Is an up-to-date browser secure on an out-of-date OS?





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35















Windows 7 support will end on January 14, 2020. Assuming that after that day I still use an updated browser, is it true that I'm still safe? Can it "patch" the OS-based security holes?



Minor question: typically, how long would the browsers stop supporting abandoned OS? Is there any number on this?






Related: Why should browser security be prioritized?

FYI: Attack surface - Wikipedia










share|improve this question




















  • 2





    Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

    – forest
    yesterday








  • 5





    Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

    – forest
    23 hours ago








  • 4





    unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

    – Ooker
    23 hours ago






  • 3





    Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

    – forest
    23 hours ago






  • 3





    in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

    – phuclv
    12 hours ago


















35















Windows 7 support will end on January 14, 2020. Assuming that after that day I still use an updated browser, is it true that I'm still safe? Can it "patch" the OS-based security holes?



Minor question: typically, how long would the browsers stop supporting abandoned OS? Is there any number on this?






Related: Why should browser security be prioritized?

FYI: Attack surface - Wikipedia










share|improve this question




















  • 2





    Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

    – forest
    yesterday








  • 5





    Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

    – forest
    23 hours ago








  • 4





    unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

    – Ooker
    23 hours ago






  • 3





    Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

    – forest
    23 hours ago






  • 3





    in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

    – phuclv
    12 hours ago














35












35








35


6






Windows 7 support will end on January 14, 2020. Assuming that after that day I still use an updated browser, is it true that I'm still safe? Can it "patch" the OS-based security holes?



Minor question: typically, how long would the browsers stop supporting abandoned OS? Is there any number on this?






Related: Why should browser security be prioritized?

FYI: Attack surface - Wikipedia










share|improve this question
















Windows 7 support will end on January 14, 2020. Assuming that after that day I still use an updated browser, is it true that I'm still safe? Can it "patch" the OS-based security holes?



Minor question: typically, how long would the browsers stop supporting abandoned OS? Is there any number on this?






Related: Why should browser security be prioritized?

FYI: Attack surface - Wikipedia







web-browser appsec operating-systems attack-vector windows-7






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 hours ago







Ooker

















asked yesterday









OokerOoker

7511913




7511913








  • 2





    Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

    – forest
    yesterday








  • 5





    Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

    – forest
    23 hours ago








  • 4





    unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

    – Ooker
    23 hours ago






  • 3





    Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

    – forest
    23 hours ago






  • 3





    in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

    – phuclv
    12 hours ago














  • 2





    Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

    – forest
    yesterday








  • 5





    Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

    – forest
    23 hours ago








  • 4





    unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

    – Ooker
    23 hours ago






  • 3





    Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

    – forest
    23 hours ago






  • 3





    in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

    – phuclv
    12 hours ago








2




2





Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

– forest
yesterday







Why not just install Windows 10? It's a pain, but you can disable the privacy-violating "telemetry" features and change the desktop to look more like that of 7. Windows 10 has significantly superior security anyways.

– forest
yesterday






5




5





Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

– forest
23 hours ago







Perhaps you should consider switching to a popular Linux distribution like Ubuntu then. It's secure, privacy-friendly, and works very well on a wide-variety of hardware (even old hardware).

– forest
23 hours ago






4




4





unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

– Ooker
23 hours ago





unfortunately, I need Windows programs (AutoHotKey, ShareX, ManicTime). Libre Office can replace MS Office, but it's buggy for large files

– Ooker
23 hours ago




3




3





Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

– forest
23 hours ago





Wine works for many programs, and there are good (sometimes superior) alternatives to many Windows-native programs that are incompatible with Wine. I suppose you'll have to decide whether or not it's important enough for you to buy a new computer (and continue to do so every few years).

– forest
23 hours ago




3




3





in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

– phuclv
12 hours ago





in fact windows 10 should often be smoother on the same specs compared to Windows 7 because of several improvements like user-space font rendering (which means less context switches → lower Meltdown impact), compressed memory (like zram on Linux) which significantly enhances responsiveness on systems with low memory

– phuclv
12 hours ago










4 Answers
4






active

oldest

votes


















44














Do not use an outdated OS, even with a modern browser.




Assuming that after that day I still use an updated browser, is it true that I'm still safe?




No, you cannot avoid browser-based security holes only by updating the browser. There are a few reasons for this. Primarily, the browser is not entirely self-contained. It makes use of operating system libraries, for example the system memory allocator. This allocator is designed to mitigate various memory corruption-related security issues. If the allocator is not kept up to date, memory exploitation bugs may be easier to perform against the browser, no matter how up to date the browser is.



Another reason is that browser security often relies on OS sandboxing features. A powerful browser exploit must be combined with a so-called sandbox escape. How easy that escape is depends on how secure the operating system is as well as how secure the browser is. By using an outdated operating system, your browser is being protected by out of date and potentially vulnerable security features.




Can it "patch" the OS-based security holes?




No. Patching operating system vulnerabilities requires elevated privileges, which a browser does not have. Even if it did, browsers are not designed to modify system settings or system files. There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS.




Minor question: typically, how long would the browsers stop supporting abandoned OS?




This is impossible to answer factually. Programs typically continue working on older systems for a very long time. They only stop working when they begin to rely on newer system APIs that aren't present in older versions. This is relatively rare. A browser should be able to run on an outdated operating system for many years, albeit not very securely. Most likely, as it begins to rely on newer and newer APIs, features in the browser will just start breaking one by one (especially security-related features) until it eventually does not start up at all. This does not give you an excuse to use an outdated OS though...






share|improve this answer



















  • 6





    Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

    – DreamConspiracy
    20 hours ago






  • 2





    In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

    – Roger Lipscombe
    17 hours ago






  • 3





    @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

    – James_pic
    16 hours ago






  • 3





    @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

    – Voo
    13 hours ago






  • 1





    @Ooker what the other two said

    – DreamConspiracy
    10 hours ago



















1














One benefit of the newer operating systems, like Windows 10 over Windows 7, is that they have more advanced features built in to the operating system to protect against entire classes of vulnerabilities.



There have actually been examples of web browsers being more secure on Windows 10 than Windows 7 even though Windows 7 is still supported! See for example this Google security vulnerability disclosure.



There was a vulnerability in Chrome, but Google's researchers believe that it was only exploitable in Windows 7 due to an additional vulnerability in that version of Windows. The additional protections in Windows 10 protected the system despite the browser vulnerability.



To answer your question about how long the browser will support legacy operating systems: Firefox for example supported Windows XP and Windows Vista until June 2018, which was well after the end of support dates for those operating systems (2014 and 2017 respectively). In their announcement, they claim to have ended support because the operating systems had known exploits which made it difficult to maintain Firefox.



Chrome supported Windows XP and Vista until version 50, which came out in April 2016 (they stopped supporting Vista before Microsoft did!)






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kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    1














    Answer:



    Browsers are a big surface-area for security flaws and are a common source of bugs and weaknesses. While 'up-to-date' and 'secure' are not the same thing at all, having a robust browser will lower your exposure significantly, and in general newer (at the very least) means there will be fewer exploits 'in use' that will effect you. So yes this helps, and if it's the only way in to you system and if it behaves itself, then the OS only needs to behave in a sane way to prevent you from being exposed (sane in a way all likely OSs are).



    However:




    • Browsers are not the only source of security issues. There is nothing it can do to protect you from anything other than itself and in a compromised system the browser could be too.


    • OS level protections while not as good as not-having-the-bug-in-the-first-place and limit the damage of a bug.



    Hence:




    • What you use the machine for and what services it has running etc will significantly effect the other risks and hence the answer to your question. If there are lots of other risky targets open and listening, how good your browser is might not be very relevant at all.


    Advice:



    The accepted wisdom (in these parts) and the advice people line up to give is:



    "More security is more better, and more newer is more security.", which in this case translates to "Update your OS too".



    Both are reasonable in my opinion and I wouldn't council against updating. But:




    • It's not a silver bullet: no-one is ever 100% safe.

    • There is potentially a trade-off against other things like convenience (which are often wrongly overlooked).

    • There's always a slim possibility updating leads to you using Windows-10, and nobody wants that...






    share|improve this answer



















    • 1





      I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

      – T. Sar
      9 hours ago



















    1














    Oh goodie a surface area question.



    The surface area of attacks against the OS via the browser varies wildly with the browser. With Internet Explorer, the surface area is vast. On the other hand, Firefox mostly uses its own decoders for everything, crushing the surface area down to only a few pieces. In any case, the TCP stack, DNS, and the font rendering engine remain attack targets. It is unwise to assume the attacker will not select a vulnerability that will actually work, and I see GDI+ remote code execution vulnerabilities every few months almost like clockwork.



    Don't do it man. At least not on Windows. On Linux we can do exotic things that make shellcode not work that would at least make the attacker have to target you specifically. But if you haven't done them don't do it on Linux either.






    share|improve this answer
























    • why can we make shellcode not working on Linux but not on Windows?

      – Ooker
      2 hours ago











    • @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

      – Joshua
      2 hours ago












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    4 Answers
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    4 Answers
    4






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    44














    Do not use an outdated OS, even with a modern browser.




    Assuming that after that day I still use an updated browser, is it true that I'm still safe?




    No, you cannot avoid browser-based security holes only by updating the browser. There are a few reasons for this. Primarily, the browser is not entirely self-contained. It makes use of operating system libraries, for example the system memory allocator. This allocator is designed to mitigate various memory corruption-related security issues. If the allocator is not kept up to date, memory exploitation bugs may be easier to perform against the browser, no matter how up to date the browser is.



    Another reason is that browser security often relies on OS sandboxing features. A powerful browser exploit must be combined with a so-called sandbox escape. How easy that escape is depends on how secure the operating system is as well as how secure the browser is. By using an outdated operating system, your browser is being protected by out of date and potentially vulnerable security features.




    Can it "patch" the OS-based security holes?




    No. Patching operating system vulnerabilities requires elevated privileges, which a browser does not have. Even if it did, browsers are not designed to modify system settings or system files. There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS.




    Minor question: typically, how long would the browsers stop supporting abandoned OS?




    This is impossible to answer factually. Programs typically continue working on older systems for a very long time. They only stop working when they begin to rely on newer system APIs that aren't present in older versions. This is relatively rare. A browser should be able to run on an outdated operating system for many years, albeit not very securely. Most likely, as it begins to rely on newer and newer APIs, features in the browser will just start breaking one by one (especially security-related features) until it eventually does not start up at all. This does not give you an excuse to use an outdated OS though...






    share|improve this answer



















    • 6





      Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

      – DreamConspiracy
      20 hours ago






    • 2





      In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

      – Roger Lipscombe
      17 hours ago






    • 3





      @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

      – James_pic
      16 hours ago






    • 3





      @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

      – Voo
      13 hours ago






    • 1





      @Ooker what the other two said

      – DreamConspiracy
      10 hours ago
















    44














    Do not use an outdated OS, even with a modern browser.




    Assuming that after that day I still use an updated browser, is it true that I'm still safe?




    No, you cannot avoid browser-based security holes only by updating the browser. There are a few reasons for this. Primarily, the browser is not entirely self-contained. It makes use of operating system libraries, for example the system memory allocator. This allocator is designed to mitigate various memory corruption-related security issues. If the allocator is not kept up to date, memory exploitation bugs may be easier to perform against the browser, no matter how up to date the browser is.



    Another reason is that browser security often relies on OS sandboxing features. A powerful browser exploit must be combined with a so-called sandbox escape. How easy that escape is depends on how secure the operating system is as well as how secure the browser is. By using an outdated operating system, your browser is being protected by out of date and potentially vulnerable security features.




    Can it "patch" the OS-based security holes?




    No. Patching operating system vulnerabilities requires elevated privileges, which a browser does not have. Even if it did, browsers are not designed to modify system settings or system files. There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS.




    Minor question: typically, how long would the browsers stop supporting abandoned OS?




    This is impossible to answer factually. Programs typically continue working on older systems for a very long time. They only stop working when they begin to rely on newer system APIs that aren't present in older versions. This is relatively rare. A browser should be able to run on an outdated operating system for many years, albeit not very securely. Most likely, as it begins to rely on newer and newer APIs, features in the browser will just start breaking one by one (especially security-related features) until it eventually does not start up at all. This does not give you an excuse to use an outdated OS though...






    share|improve this answer



















    • 6





      Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

      – DreamConspiracy
      20 hours ago






    • 2





      In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

      – Roger Lipscombe
      17 hours ago






    • 3





      @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

      – James_pic
      16 hours ago






    • 3





      @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

      – Voo
      13 hours ago






    • 1





      @Ooker what the other two said

      – DreamConspiracy
      10 hours ago














    44












    44








    44







    Do not use an outdated OS, even with a modern browser.




    Assuming that after that day I still use an updated browser, is it true that I'm still safe?




    No, you cannot avoid browser-based security holes only by updating the browser. There are a few reasons for this. Primarily, the browser is not entirely self-contained. It makes use of operating system libraries, for example the system memory allocator. This allocator is designed to mitigate various memory corruption-related security issues. If the allocator is not kept up to date, memory exploitation bugs may be easier to perform against the browser, no matter how up to date the browser is.



    Another reason is that browser security often relies on OS sandboxing features. A powerful browser exploit must be combined with a so-called sandbox escape. How easy that escape is depends on how secure the operating system is as well as how secure the browser is. By using an outdated operating system, your browser is being protected by out of date and potentially vulnerable security features.




    Can it "patch" the OS-based security holes?




    No. Patching operating system vulnerabilities requires elevated privileges, which a browser does not have. Even if it did, browsers are not designed to modify system settings or system files. There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS.




    Minor question: typically, how long would the browsers stop supporting abandoned OS?




    This is impossible to answer factually. Programs typically continue working on older systems for a very long time. They only stop working when they begin to rely on newer system APIs that aren't present in older versions. This is relatively rare. A browser should be able to run on an outdated operating system for many years, albeit not very securely. Most likely, as it begins to rely on newer and newer APIs, features in the browser will just start breaking one by one (especially security-related features) until it eventually does not start up at all. This does not give you an excuse to use an outdated OS though...






    share|improve this answer













    Do not use an outdated OS, even with a modern browser.




    Assuming that after that day I still use an updated browser, is it true that I'm still safe?




    No, you cannot avoid browser-based security holes only by updating the browser. There are a few reasons for this. Primarily, the browser is not entirely self-contained. It makes use of operating system libraries, for example the system memory allocator. This allocator is designed to mitigate various memory corruption-related security issues. If the allocator is not kept up to date, memory exploitation bugs may be easier to perform against the browser, no matter how up to date the browser is.



    Another reason is that browser security often relies on OS sandboxing features. A powerful browser exploit must be combined with a so-called sandbox escape. How easy that escape is depends on how secure the operating system is as well as how secure the browser is. By using an outdated operating system, your browser is being protected by out of date and potentially vulnerable security features.




    Can it "patch" the OS-based security holes?




    No. Patching operating system vulnerabilities requires elevated privileges, which a browser does not have. Even if it did, browsers are not designed to modify system settings or system files. There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS.




    Minor question: typically, how long would the browsers stop supporting abandoned OS?




    This is impossible to answer factually. Programs typically continue working on older systems for a very long time. They only stop working when they begin to rely on newer system APIs that aren't present in older versions. This is relatively rare. A browser should be able to run on an outdated operating system for many years, albeit not very securely. Most likely, as it begins to rely on newer and newer APIs, features in the browser will just start breaking one by one (especially security-related features) until it eventually does not start up at all. This does not give you an excuse to use an outdated OS though...







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered yesterday









    forestforest

    39.9k18131145




    39.9k18131145








    • 6





      Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

      – DreamConspiracy
      20 hours ago






    • 2





      In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

      – Roger Lipscombe
      17 hours ago






    • 3





      @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

      – James_pic
      16 hours ago






    • 3





      @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

      – Voo
      13 hours ago






    • 1





      @Ooker what the other two said

      – DreamConspiracy
      10 hours ago














    • 6





      Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

      – DreamConspiracy
      20 hours ago






    • 2





      In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

      – Roger Lipscombe
      17 hours ago






    • 3





      @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

      – James_pic
      16 hours ago






    • 3





      @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

      – Voo
      13 hours ago






    • 1





      @Ooker what the other two said

      – DreamConspiracy
      10 hours ago








    6




    6





    Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

    – DreamConspiracy
    20 hours ago





    Re: "There is no extension or web page you can go to that is able to patch security vulnerabilities in your OS". Well... There might be. But they would likely end up patching whatever security vulnerability allowed them to work in the first place.

    – DreamConspiracy
    20 hours ago




    2




    2





    In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

    – Roger Lipscombe
    17 hours ago





    In addition to the memory allocator example you give: The browser uses the OS networking stack, which might have vulnerabilities. Above that, the browser might use the OS implementation of TLS.

    – Roger Lipscombe
    17 hours ago




    3




    3





    @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

    – James_pic
    16 hours ago





    @Ooker I believe there have been instances where attackers (who in the cases I'm thinking of, were believed to be nation state actors) compromised a high-value system, then applied the necessary security updates to the system to prevent anyone else compromising it (presumably because they were worried about other nation state actors).

    – James_pic
    16 hours ago




    3




    3





    @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

    – Voo
    13 hours ago





    @james I don't think we have to go that far (state sponsored malware). It's common for standard malware to patch the system after they've gotten access. Why share your valuable infected system with someone else?

    – Voo
    13 hours ago




    1




    1





    @Ooker what the other two said

    – DreamConspiracy
    10 hours ago





    @Ooker what the other two said

    – DreamConspiracy
    10 hours ago













    1














    One benefit of the newer operating systems, like Windows 10 over Windows 7, is that they have more advanced features built in to the operating system to protect against entire classes of vulnerabilities.



    There have actually been examples of web browsers being more secure on Windows 10 than Windows 7 even though Windows 7 is still supported! See for example this Google security vulnerability disclosure.



    There was a vulnerability in Chrome, but Google's researchers believe that it was only exploitable in Windows 7 due to an additional vulnerability in that version of Windows. The additional protections in Windows 10 protected the system despite the browser vulnerability.



    To answer your question about how long the browser will support legacy operating systems: Firefox for example supported Windows XP and Windows Vista until June 2018, which was well after the end of support dates for those operating systems (2014 and 2017 respectively). In their announcement, they claim to have ended support because the operating systems had known exploits which made it difficult to maintain Firefox.



    Chrome supported Windows XP and Vista until version 50, which came out in April 2016 (they stopped supporting Vista before Microsoft did!)






    share|improve this answer








    New contributor




    kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.

























      1














      One benefit of the newer operating systems, like Windows 10 over Windows 7, is that they have more advanced features built in to the operating system to protect against entire classes of vulnerabilities.



      There have actually been examples of web browsers being more secure on Windows 10 than Windows 7 even though Windows 7 is still supported! See for example this Google security vulnerability disclosure.



      There was a vulnerability in Chrome, but Google's researchers believe that it was only exploitable in Windows 7 due to an additional vulnerability in that version of Windows. The additional protections in Windows 10 protected the system despite the browser vulnerability.



      To answer your question about how long the browser will support legacy operating systems: Firefox for example supported Windows XP and Windows Vista until June 2018, which was well after the end of support dates for those operating systems (2014 and 2017 respectively). In their announcement, they claim to have ended support because the operating systems had known exploits which made it difficult to maintain Firefox.



      Chrome supported Windows XP and Vista until version 50, which came out in April 2016 (they stopped supporting Vista before Microsoft did!)






      share|improve this answer








      New contributor




      kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.























        1












        1








        1







        One benefit of the newer operating systems, like Windows 10 over Windows 7, is that they have more advanced features built in to the operating system to protect against entire classes of vulnerabilities.



        There have actually been examples of web browsers being more secure on Windows 10 than Windows 7 even though Windows 7 is still supported! See for example this Google security vulnerability disclosure.



        There was a vulnerability in Chrome, but Google's researchers believe that it was only exploitable in Windows 7 due to an additional vulnerability in that version of Windows. The additional protections in Windows 10 protected the system despite the browser vulnerability.



        To answer your question about how long the browser will support legacy operating systems: Firefox for example supported Windows XP and Windows Vista until June 2018, which was well after the end of support dates for those operating systems (2014 and 2017 respectively). In their announcement, they claim to have ended support because the operating systems had known exploits which made it difficult to maintain Firefox.



        Chrome supported Windows XP and Vista until version 50, which came out in April 2016 (they stopped supporting Vista before Microsoft did!)






        share|improve this answer








        New contributor




        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.










        One benefit of the newer operating systems, like Windows 10 over Windows 7, is that they have more advanced features built in to the operating system to protect against entire classes of vulnerabilities.



        There have actually been examples of web browsers being more secure on Windows 10 than Windows 7 even though Windows 7 is still supported! See for example this Google security vulnerability disclosure.



        There was a vulnerability in Chrome, but Google's researchers believe that it was only exploitable in Windows 7 due to an additional vulnerability in that version of Windows. The additional protections in Windows 10 protected the system despite the browser vulnerability.



        To answer your question about how long the browser will support legacy operating systems: Firefox for example supported Windows XP and Windows Vista until June 2018, which was well after the end of support dates for those operating systems (2014 and 2017 respectively). In their announcement, they claim to have ended support because the operating systems had known exploits which made it difficult to maintain Firefox.



        Chrome supported Windows XP and Vista until version 50, which came out in April 2016 (they stopped supporting Vista before Microsoft did!)







        share|improve this answer








        New contributor




        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        share|improve this answer



        share|improve this answer






        New contributor




        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        answered 11 hours ago









        kepstinkepstin

        111




        111




        New contributor




        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.





        New contributor





        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.






        kepstin is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.























            1














            Answer:



            Browsers are a big surface-area for security flaws and are a common source of bugs and weaknesses. While 'up-to-date' and 'secure' are not the same thing at all, having a robust browser will lower your exposure significantly, and in general newer (at the very least) means there will be fewer exploits 'in use' that will effect you. So yes this helps, and if it's the only way in to you system and if it behaves itself, then the OS only needs to behave in a sane way to prevent you from being exposed (sane in a way all likely OSs are).



            However:




            • Browsers are not the only source of security issues. There is nothing it can do to protect you from anything other than itself and in a compromised system the browser could be too.


            • OS level protections while not as good as not-having-the-bug-in-the-first-place and limit the damage of a bug.



            Hence:




            • What you use the machine for and what services it has running etc will significantly effect the other risks and hence the answer to your question. If there are lots of other risky targets open and listening, how good your browser is might not be very relevant at all.


            Advice:



            The accepted wisdom (in these parts) and the advice people line up to give is:



            "More security is more better, and more newer is more security.", which in this case translates to "Update your OS too".



            Both are reasonable in my opinion and I wouldn't council against updating. But:




            • It's not a silver bullet: no-one is ever 100% safe.

            • There is potentially a trade-off against other things like convenience (which are often wrongly overlooked).

            • There's always a slim possibility updating leads to you using Windows-10, and nobody wants that...






            share|improve this answer



















            • 1





              I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

              – T. Sar
              9 hours ago
















            1














            Answer:



            Browsers are a big surface-area for security flaws and are a common source of bugs and weaknesses. While 'up-to-date' and 'secure' are not the same thing at all, having a robust browser will lower your exposure significantly, and in general newer (at the very least) means there will be fewer exploits 'in use' that will effect you. So yes this helps, and if it's the only way in to you system and if it behaves itself, then the OS only needs to behave in a sane way to prevent you from being exposed (sane in a way all likely OSs are).



            However:




            • Browsers are not the only source of security issues. There is nothing it can do to protect you from anything other than itself and in a compromised system the browser could be too.


            • OS level protections while not as good as not-having-the-bug-in-the-first-place and limit the damage of a bug.



            Hence:




            • What you use the machine for and what services it has running etc will significantly effect the other risks and hence the answer to your question. If there are lots of other risky targets open and listening, how good your browser is might not be very relevant at all.


            Advice:



            The accepted wisdom (in these parts) and the advice people line up to give is:



            "More security is more better, and more newer is more security.", which in this case translates to "Update your OS too".



            Both are reasonable in my opinion and I wouldn't council against updating. But:




            • It's not a silver bullet: no-one is ever 100% safe.

            • There is potentially a trade-off against other things like convenience (which are often wrongly overlooked).

            • There's always a slim possibility updating leads to you using Windows-10, and nobody wants that...






            share|improve this answer



















            • 1





              I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

              – T. Sar
              9 hours ago














            1












            1








            1







            Answer:



            Browsers are a big surface-area for security flaws and are a common source of bugs and weaknesses. While 'up-to-date' and 'secure' are not the same thing at all, having a robust browser will lower your exposure significantly, and in general newer (at the very least) means there will be fewer exploits 'in use' that will effect you. So yes this helps, and if it's the only way in to you system and if it behaves itself, then the OS only needs to behave in a sane way to prevent you from being exposed (sane in a way all likely OSs are).



            However:




            • Browsers are not the only source of security issues. There is nothing it can do to protect you from anything other than itself and in a compromised system the browser could be too.


            • OS level protections while not as good as not-having-the-bug-in-the-first-place and limit the damage of a bug.



            Hence:




            • What you use the machine for and what services it has running etc will significantly effect the other risks and hence the answer to your question. If there are lots of other risky targets open and listening, how good your browser is might not be very relevant at all.


            Advice:



            The accepted wisdom (in these parts) and the advice people line up to give is:



            "More security is more better, and more newer is more security.", which in this case translates to "Update your OS too".



            Both are reasonable in my opinion and I wouldn't council against updating. But:




            • It's not a silver bullet: no-one is ever 100% safe.

            • There is potentially a trade-off against other things like convenience (which are often wrongly overlooked).

            • There's always a slim possibility updating leads to you using Windows-10, and nobody wants that...






            share|improve this answer













            Answer:



            Browsers are a big surface-area for security flaws and are a common source of bugs and weaknesses. While 'up-to-date' and 'secure' are not the same thing at all, having a robust browser will lower your exposure significantly, and in general newer (at the very least) means there will be fewer exploits 'in use' that will effect you. So yes this helps, and if it's the only way in to you system and if it behaves itself, then the OS only needs to behave in a sane way to prevent you from being exposed (sane in a way all likely OSs are).



            However:




            • Browsers are not the only source of security issues. There is nothing it can do to protect you from anything other than itself and in a compromised system the browser could be too.


            • OS level protections while not as good as not-having-the-bug-in-the-first-place and limit the damage of a bug.



            Hence:




            • What you use the machine for and what services it has running etc will significantly effect the other risks and hence the answer to your question. If there are lots of other risky targets open and listening, how good your browser is might not be very relevant at all.


            Advice:



            The accepted wisdom (in these parts) and the advice people line up to give is:



            "More security is more better, and more newer is more security.", which in this case translates to "Update your OS too".



            Both are reasonable in my opinion and I wouldn't council against updating. But:




            • It's not a silver bullet: no-one is ever 100% safe.

            • There is potentially a trade-off against other things like convenience (which are often wrongly overlooked).

            • There's always a slim possibility updating leads to you using Windows-10, and nobody wants that...







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 11 hours ago









            ANoneANone

            1992




            1992








            • 1





              I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

              – T. Sar
              9 hours ago














            • 1





              I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

              – T. Sar
              9 hours ago








            1




            1





            I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

            – T. Sar
            9 hours ago





            I Use Windows 10. In fact, I'm happily using it and having far less problems than any other operational system I have ever put my hands on. If microsoft wants to take a peek on my hardware and installed programs in exchange for a better, safer OS so be it. I prefer my stuff to be on the hands of a competent corporate company than on the hands of some weird guy that is know for having fits of angry rage because someone didn't keep with his arcane nomeclature scheme.

            – T. Sar
            9 hours ago











            1














            Oh goodie a surface area question.



            The surface area of attacks against the OS via the browser varies wildly with the browser. With Internet Explorer, the surface area is vast. On the other hand, Firefox mostly uses its own decoders for everything, crushing the surface area down to only a few pieces. In any case, the TCP stack, DNS, and the font rendering engine remain attack targets. It is unwise to assume the attacker will not select a vulnerability that will actually work, and I see GDI+ remote code execution vulnerabilities every few months almost like clockwork.



            Don't do it man. At least not on Windows. On Linux we can do exotic things that make shellcode not work that would at least make the attacker have to target you specifically. But if you haven't done them don't do it on Linux either.






            share|improve this answer
























            • why can we make shellcode not working on Linux but not on Windows?

              – Ooker
              2 hours ago











            • @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

              – Joshua
              2 hours ago
















            1














            Oh goodie a surface area question.



            The surface area of attacks against the OS via the browser varies wildly with the browser. With Internet Explorer, the surface area is vast. On the other hand, Firefox mostly uses its own decoders for everything, crushing the surface area down to only a few pieces. In any case, the TCP stack, DNS, and the font rendering engine remain attack targets. It is unwise to assume the attacker will not select a vulnerability that will actually work, and I see GDI+ remote code execution vulnerabilities every few months almost like clockwork.



            Don't do it man. At least not on Windows. On Linux we can do exotic things that make shellcode not work that would at least make the attacker have to target you specifically. But if you haven't done them don't do it on Linux either.






            share|improve this answer
























            • why can we make shellcode not working on Linux but not on Windows?

              – Ooker
              2 hours ago











            • @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

              – Joshua
              2 hours ago














            1












            1








            1







            Oh goodie a surface area question.



            The surface area of attacks against the OS via the browser varies wildly with the browser. With Internet Explorer, the surface area is vast. On the other hand, Firefox mostly uses its own decoders for everything, crushing the surface area down to only a few pieces. In any case, the TCP stack, DNS, and the font rendering engine remain attack targets. It is unwise to assume the attacker will not select a vulnerability that will actually work, and I see GDI+ remote code execution vulnerabilities every few months almost like clockwork.



            Don't do it man. At least not on Windows. On Linux we can do exotic things that make shellcode not work that would at least make the attacker have to target you specifically. But if you haven't done them don't do it on Linux either.






            share|improve this answer













            Oh goodie a surface area question.



            The surface area of attacks against the OS via the browser varies wildly with the browser. With Internet Explorer, the surface area is vast. On the other hand, Firefox mostly uses its own decoders for everything, crushing the surface area down to only a few pieces. In any case, the TCP stack, DNS, and the font rendering engine remain attack targets. It is unwise to assume the attacker will not select a vulnerability that will actually work, and I see GDI+ remote code execution vulnerabilities every few months almost like clockwork.



            Don't do it man. At least not on Windows. On Linux we can do exotic things that make shellcode not work that would at least make the attacker have to target you specifically. But if you haven't done them don't do it on Linux either.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 5 hours ago









            JoshuaJoshua

            73748




            73748













            • why can we make shellcode not working on Linux but not on Windows?

              – Ooker
              2 hours ago











            • @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

              – Joshua
              2 hours ago



















            • why can we make shellcode not working on Linux but not on Windows?

              – Ooker
              2 hours ago











            • @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

              – Joshua
              2 hours ago

















            why can we make shellcode not working on Linux but not on Windows?

            – Ooker
            2 hours ago





            why can we make shellcode not working on Linux but not on Windows?

            – Ooker
            2 hours ago













            @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

            – Joshua
            2 hours ago





            @Ooker: We can prevent execve() from working by ptrace() or LSM or something more exotic. We can also move the syscall gate but that doesn't block everything.

            – Joshua
            2 hours ago


















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