RHEL 5 : kernel (RHSA-2014:1959)

This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated kernel packages that fix one security issue and three bugs are
now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.

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

* It was found that the permission checks performed by the Linux
kernel when a netlink message was received were not sufficient. A
local, unprivileged user could potentially bypass these restrictions
by passing a netlink socket as stdout or stderr to a more privileged
process and altering the output of this process. (CVE-2014-0181,
Moderate)

Red Hat would like to thank Andy Lutomirski for reporting this issue.

This update also fixes the following bugs :

* Previously, the kernel did not successfully deliver multicast
packets when the multicast querier was disabled. Consequently, the
corosync utility terminated unexpectedly and the affected storage node
did not join its intended cluster. With this update, multicast packets
are delivered properly when the multicast querier is disabled, and
corosync handles the node as expected. (BZ#902454)

* Previously, the kernel wrote the metadata contained in all system
information blocks on a single page of the /proc/sysinfo file.
However, when the machine configuration was very extensive and the
data did not fit on a single page, the system overwrote random memory
regions, which in turn caused data corruption when reading the
/proc/sysconf file. With this update, /proc/sysinfo automatically
allocates a larger buffer if the data output does not fit the current
buffer, which prevents the data corruption. (BZ#1131283)

* Prior to this update, the it_real_fn() function did not, in certain
cases, successfully acquire the SIGLOCK signal when the do_setitimer()
function used the ITIMER_REAL timer. As a consequence, the current
process entered an endless loop and became unresponsive. This update
fixes the bug and it_real_fn() no longer causes the kernel to become
unresponsive. (BZ#1134654)

All kernel users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. The system
must be rebooted for this update to take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2014-0181.html
http://rhn.redhat.com/errata/RHSA-2014-1959.html

Solution :

Update the affected packages.

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 1.4
(CVSS2#E:U/RL:OF/RC:UC)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 79737 ()

Bugtraq ID: 67034

CVE ID: CVE-2014-0181

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