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Your memory address 0xbffff880 is most likely non-executable, but only read/write. There are a couple of ways you can overcome this. If that is a stack address you can use -z execstack while compiling. This will essentially make the entire stack memory executable. For a more robust solution you can write the shellcode to call mprotect on the address ...


Even if the question is pretty old, and the attack changed, the source is the same I ve been hit by the new version of this ( and stablehost is the linking keyword here, still here years after the OP asked ), one of the servers I managed ( gentoo hardened, strong grsec config )have been compromised, most probably by shellshock. For those interested, I ...

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