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

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

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

Description :

This update fixes the following security issues :

- A use-after-free flaw was found in the madvise() system
call implementation in the Linux kernel. A local,
unprivileged user could use this flaw to cause a denial
of service or, potentially, escalate their privileges.
(CVE-2012-3511, Moderate)

- A flaw was found in the way the Linux kernel's TCP/IP
protocol suite implementation handled IPv6 sockets that
used the UDP_CORK option. A local, unprivileged user
could use this flaw to cause a denial of service.
(CVE-2013-4162, Moderate)

- An information leak flaw in the Linux kernel could allow
a local, unprivileged user to leak kernel memory to
user-space. (CVE-2013-2141, Low)

This update also fixes the following bugs :

- A bug in the be2net driver prevented communication
between NICs using be2net. This update applies a patch
addressing this problem along with several other
upstream patches that fix various other problems.
Traffic between NICs using the be2net driver now
proceeds as expected.

- A recent patch fixing a problem that prevented
communication between NICs using the be2net driver
caused the firmware of NICs to become unresponsive, and
thus triggered a kernel panic. The problem was caused by
unnecessary usage of a hardware workaround that allows
skipping VLAN tag insertion. A patch has been applied
and the workaround is now used only when the
multi-channel configuration is enabled on the NIC. Note
that the bug only affected the NICs with firmware
version 4.2.xxxx.

- A bug in the autofs4 mount expiration code could cause
the autofs4 module to falsely report a busy tree of NFS
mounts as 'not in use'. Consequently, automount
attempted to unmount the tree and failed with a 'failed
to umount offset' error, leaving the mount tree to
appear as empty directories. A patch has been applied to
remove an incorrectly used autofs dentry mount check and
the aforementioned problem no longer occurs.

- A race condition in the be_open function in the be2net
driver could trigger the BUG_ON() macro, which resulted
in a kernel panic. A patch addressing this problem has
been applied and the race condition is now avoided by
enabling polling before enabling interrupts globally.
The kernel no longer panics in this situation.

The system must be rebooted for this update to take effect.

See also :

http://www.nessus.org/u?8eb452e1

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.2
(CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 70188 ()

Bugtraq ID:

CVE ID: CVE-2012-3511
CVE-2013-2141
CVE-2013-4162