Q&A: Ubuntu 9.10 securityNov 06, 2009, 07:34 (0 Talkback[s])
(Other stories by Mirko Zorz)
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"Modern CPUs allow regions of memory to be marked as "non-executable", like the stack and heap. This puts a stop to large classes of vulnerability exploits. For systems that do not have it (or do not run in 64bit mode), Ubuntu's kernel now includes a partial form of this, emulated in the kernel by way of memory segment limits.
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