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TITLE:
Linux Kernel NULL Pointer Dereferences and Security Bypass

SECUNIA ADVISORY ID:
SA24492

VERIFY ADVISORY:
http://secunia.com/advisories/24492/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, DoS

WHERE:
>From remote

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

DESCRIPTION:
Some vulnerabilities have been reported in the Linux Kernel, which
potentially can be exploited by malicious people to bypass certain
security restrictions or cause a DoS (Denial of Service).

1) NULL pointer dereferences within net/netfilter/nfnetlink_log.c can
potentially be exploited to cause a kernel panic by sending specially
crafted packets to a vulnerable system.

2) An error exists within conntrack when assembling fragmented IPv6
packets. This can potentially be exploited to bypass certain rulesets
that accept ESTABLISHED packets early.

SOLUTION:
Update to version 2.6.20.3.

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

ORIGINAL ADVISORY:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3

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About:
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