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A recently published attack exploiting newer versions of the Linux kernel is getting plenty of notice because it works even when security enhancements are running and the bug is virtually impossible to detect in source code reviews.

The exploit code was released Friday by Brad Spengler of grsecurity, a developer of applications that enhance the security of the open-source OS. While it targets Linux versions that have yet to be adopted by most vendors, the bug has captured the attention of security researchers, who say it exposes overlooked weaknesses.

Linux developers "tried to protect against it and what this exploit shows is that even with all the protections turned to super max, it's still possible for an attacker to figure out ways around this system," said Bas Alberts, senior security researcher at Immunity. "The interesting angle here is the actual thing that made it exploitable, the whole class of vulnerabilities, which is a very serious thing."

http://www.theregister.co.uk/2009/07/17 … l_exploit/