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TITLE:
Linux Kernel "sys_epoll_wait()" Function Integer Overflow

SECUNIA ADVISORY ID:
SA14548

VERIFY ADVISORY:
http://secunia.com/advisories/14548/

CRITICAL:
Not critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/

DESCRIPTION:
Georgi Guninski has reported a potential vulnerability in the Linux
kernel, which may be exploited by malicious people to gain escalated
privileges.

The vulnerability is caused due to an integer overflow in the
"sys_epoll_wait()" function and can be exploited to cause a buffer
overflow overwriting low kernel memory.

Successful exploitation may potentially allow execution of arbitrary
code with escalated privileges. However, few applications reportedly
use the affected part of the kernel memory space.

The vulnerability has been reported in versions 2.6 through 2.6.11.

SOLUTION:
Update to version 2.6.11.2 or later.
http://kernel.org/

PROVIDED AND/OR DISCOVERED BY:
Georgi Guninski

ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.11.2

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