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TITLE:
Linux Kernel PPPoE Socket "PPPIOCGCHAN" Denial of Service

SECUNIA ADVISORY ID:
SA25163

VERIFY ADVISORY:
http://secunia.com/advisories/25163/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

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

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

The vulnerability is caused due to a memory leak when releasing PPPoE
sockets after they are connected, but before the "PPPIOCGCHAN" ioctl
is called. This can be exploited to cause a DoS due to memory
exhaustion.

The vulnerability is reported in versions prior to 2.6.21-git8. Other
versions may also be affected.

SOLUTION:
Update to version 2.6.21-git8.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.21-git8.log

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