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TITLE:
Linux Kernel "rt6_fill_node()" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA31579

VERIFY ADVISORY:
http://secunia.com/advisories/31579/

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 can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The vulnerability is caused due to a NULL-pointer dereference error
within the "rt6_fill_node()" function in net/ipv6/route.c. This can
be exploited to trigger a kernel panic via an "ip route get"
command.

Successful exploitation requires that the IPv6 default route is not
set.

The vulnerability is reported in version 2.6.26.2. Other versions may
also be affected.

SOLUTION:
Fixed in the GIT repository.
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5e0115e500fe9dd2ca11e6f92db9123204f1327a

Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
John Gumb

ORIGINAL ADVISORY:
http://lkml.org/lkml/2008/8/7/230

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