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posted by Fnord666 on Wednesday September 13 2017, @06:03AM   Printer-friendly
from the going-back dept.

Return-oriented programming (ROP) is now a common technique for compromising systems via a stack-smashing vulnerability. Although restrictions on executing code on the stack have mostly put an end to many simple stack-smashing attacks, that does not mean that they are no longer a threat. There are various schemes in use for defeating ROP attacks. A new mechanism called "RETGUARD" is being implemented in OpenBSD and is notable for its relative simplicity. It makes use of a simple return-address transformation to disrupt ROP chains to hinder their execution and takes the form of a patch to the LLVM compiler adding a new flag.


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  • (Score: 2) by Virindi on Wednesday September 13 2017, @11:48AM

    by Virindi (3484) on Wednesday September 13 2017, @11:48AM (#567181)

    On further reflection, you're right. I didn't consider that the "next frame location" could be based on some kind of pseudorandom reversible sequence. Could work :)

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