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TITLE:
Linux Kernel "pppol2tp_recvmsg()" Memory Corruption Vulnerability

SECUNIA ADVISORY ID:
SA30719

VERIFY ADVISORY:
http://secunia.com/advisories/30719/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

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 people to cause a DoS
(Denial of Service).

The vulnerability is caused due to a boundary error in the
"pppol2tp_recvmsg()" function and can potentially be exploited to
corrupt kernel memory via a specially crafted PPP over L2TP packet.

The vulnerability is reported in 2.6.x versions prior to 2.6.26-rc6.

SOLUTION:
Use PPP over L2TP in trusted networks only.

Fixed in version 2.6.26-rc6.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Ilja of Netric.

ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.26-rc6

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6b6707a50c7598a83820077393f8823ab791abf8

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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