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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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RETGUARD: A Return-Oriented Programming Defense From OpenBSD
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Grelb's Reminder:
Eighty percent of all people consider themselves to be above
average drivers.
(Score: 2) by Wootery on Thursday September 14 2017, @08:18AM
I don't know about that - ARM is doing ok. MIPS, POWER, SPARC, SuperH, Alpha... not so much. I hope there's a future for RISC-V.
In the GPU world they're essentially free to re-architect their hardware every generation, as everything is JIT compiled.