[security-alerts] FW: [SA24492] Linux Kernel NULL Pointer Dereferences and Security Bypass

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> 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
>