Scientific Linux Security Update : kernel on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issue :

- A flaw in the xfrm6_tunnel_rcv() function in the Linux
kernel's IPv6 implementation could lead to a
use-after-free or double free flaw in tunnel6_rcv(). A
remote attacker could use this flaw to send
specially-crafted packets to a target system that is
using IPv6 and also has the xfrm6_tunnel kernel module
loaded, causing it to crash. (CVE-2012-1583, Important)

If you do not run applications that use xfrm6_tunnel, you can prevent
the xfrm6_tunnel module from being loaded by creating (as the root
user) a '/etc/modprobe.d/xfrm6_tunnel.conf' file, and adding the
following line to it :

blacklist xfrm6_tunnel

This way, the xfrm6_tunnel module cannot be loaded accidentally. A
reboot is not necessary for this change to take effect.

This update also fixes various bugs and adds an enhancement. The
system must be rebooted for this update to take effect.

The corresponding kernel-module-<module>-<kernel-version> modules have
also been updated to match the kernel version.

See also :

http://www.nessus.org/u?91c75017

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61301 ()

Bugtraq ID:

CVE ID: CVE-2012-1583