493560 – (CVE-2013-6431) Kernel : net: fib: fib6_add: potential NULL pointer dereference (CVE-2013-6431)

Bug 493560 (CVE-2013-6431) - Kernel : net: fib: fib6_add: potential NULL pointer dereference (CVE-2013-6431)

Summary: Kernel : net: fib: fib6_add: potential NULL pointer dereference (CVE-2013-6431)

Status:	RESOLVED FIXED

Alias:	CVE-2013-6431

Product:	Gentoo Security
Classification:	Unclassified
Component:	Kernel (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Gentoo Kernel Security

URL:	https://bugzilla.redhat.com/show_bug....
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2013-12-07 20:02 UTC by Agostino Sarubbo
Modified:	2022-03-25 16:46 UTC (History)
CC List:	1 user (show)

See Also:
Package list:
Runtime testing required:	---

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Description Agostino Sarubbo gentoo-dev

2013-12-07 20:02:12 UTC

From ${URL} :

Linux kernel built with the IPv6 protocol(CONFIG_IPv6) along with the IPv6
source address based routing support(CONFIG_IPV6_SUBTREE) is vulnerable to a
NULL pointer dereference flaw. It could occur while doing an ioctl(SIOCADDRT)
call on an IPv6 socket. User would need to have CAP_NET_ADMIN privileges to
perform such a call.

A user/program with CAP_NET_ADMIN privileges could use this flaw to crash a
system resulting in DoS.

Upstream fix:
-------------
 -> https://git.kernel.org/linus/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2

Comment 1 GLSAMaker/CVETool Bot gentoo-dev

2013-12-12 15:20:37 UTC

CVE-2013-6431 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-6431):
  The fib6_add function in net/ipv6/ip6_fib.c in the Linux kernel before
  3.11.5 does not properly implement error-code encoding, which allows local
  users to cause a denial of service (NULL pointer dereference and system
  crash) by leveraging the CAP_NET_ADMIN capability for an IPv6 SIOCADDRT
  ioctl call.

Comment 2 John Helmert III archtester

2022-03-25 16:46:35 UTC

Fix in 3.11.5 onwards