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A webserver could use the contents of the User-Agent header for logging purposes, to control access ("deny all bots") or return alternative responses ("mobile-friendly pages"). The validity of a header value depends on the application, it is not possible to write on rule that works with everything. Consider the Cookie header. One site could purely use it to ...


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The vulnerability (still undisclosed) is also described as "Microsoft Schannel Remote Code Execution Vulnerability", which indicates that it is an implementation weakness (namely, a probably boring buffer overflow), not a protocol weakness. Thus, there is no reason to believe that the vulnerability would be shared with any other independent implementation of ...


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Yes, you normally overflow buffers without using environment variables. In fact, I'm not exactly sure how you would manage to overflow a buffer using only an environment variable. Ok, that last part is slightly facetious, you could potentially malform an environment variable to cause an overflow as well, but you can cause a buffer overflow with any ...



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