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Re: non-executable stack (via PT_GNU_STACK) not being enforced


On Sun, Oct 10, 2010 at 09:53:40AM -0400, Brchk05 wrote:
> However, I am able to inject and execute shellcode from a stack local character buffer in both versions.  Is there another system option I am unaware of that affects enforcement?  Is enforcement not supported for my system version?

Your CPU may not support NX enforcement. Check your dmesg output, and your
cpuflags line in /proc/cpuinfo for "nx".

See https://wiki.ubuntu.com/Security/Features#nx though ignore the nx-emu
notes, as that's not in Debian.


Kees Cook                                            @debian.org

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