Brad Spengler Exposes Exploit in Linux Kernel 2.6.31
The developer behind the grsecurity.net security portal, Brad Spengler, has released videos on the Web that demonstrate a security hole in the current Linux kernel.
Brad Spengler (alias Spender) is a known entity in the Linux security field. Revealing his videos on his YouTube channel certainly lends his case credibility. The videos show that the exploit uses a buffer overflow in the perf_counter after a kernel crash, which also bypasses SE Linux.
As Spengler shows in his video, the Kernel 2.6.31 security hole also applies to 64-bit systems.
A recent followup to Spengler's video for a 32-bit system is one for a 64-bit Ubuntu exploit. He intends to publish details soon. Fortunately the exploit is currently not freely circulating.
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How to mitigate such risks..
At our IT Security Conference, AthCon, www.athcon.org which will be hosted in Athens, Greece in Q2 2010, we'll be discussing how to mitigate such vulnerabilities in production code & how to thwart null pointer dereference vulnerabilities once & forever.
- AthCon team.