TITLE:
Linux Kernel Socket Data Buffering Denial of Service

SECUNIA ADVISORY ID:
SA18205

VERIFY ADVISORY:
http://secunia.com/advisories/18205/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/product/2719/
Linux Kernel 2.4.x
http://secunia.com/product/763/

DESCRIPTION:
A vulnerability has been reported in the Linux Kernel, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerability is caused due to missing memory availability
checking when buffering data for transfer over a pair of sockets.
This can be exploited by malicious users to cause a DoS (memory
exhaustion) by creating a large number of connected file descriptors
or socketpairs that use the largest possible kernel buffer for the
data transfer. 

The vulnerability has been reported in version 2.4.22 and 2.6.12.
Other versions may also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Discovered by anonymous and reported via iDEFENSE.

ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=362

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