RHEL 5 : kernel (RHSA-2010:0178)

This script is Copyright (C) 2010-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

Updated kernel packages that fix three security issues, address
several hundred bugs, and add numerous enhancements are now available
as part of the ongoing support and maintenance of Red Hat Enterprise
Linux version 5. This is the fifth regular update.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

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

This update fixes the following security issues :

* a race condition was found in the mac80211 implementation, a
framework used for writing drivers for wireless devices. An attacker
could trigger this flaw by sending a Delete Block ACK (DELBA) packet
to a target system, resulting in a remote denial of service. Note:
This issue only affected users on 802.11n networks, and that also use
the iwlagn driver with Intel wireless hardware. (CVE-2009-4027,
Important)

* a flaw was found in the gfs2_lock() implementation. The GFS2 locking
code could skip the lock operation for files that have the S_ISGID bit
(set-group-ID on execution) in their mode set. A local, unprivileged
user on a system that has a GFS2 file system mounted could use this
flaw to cause a kernel panic. (CVE-2010-0727, Moderate)

* a divide-by-zero flaw was found in the ext4 file system code. A
local attacker could use this flaw to cause a denial of service by
mounting a specially-crafted ext4 file system. (CVE-2009-4307, Low)

These updated packages also include several hundred bug fixes for and
enhancements to the Linux kernel. Space precludes documenting each of
these changes in this advisory and users are directed to the Red Hat
Enterprise Linux 5.5 Release Notes for information on the most
significant of these changes :

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.5/html/
Release_Notes/

Also, for details concerning every bug fixed in and every enhancement
added to the kernel for this release, refer to the kernel chapter in
the Red Hat Enterprise Linux 5.5 Technical Notes :

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.5/html/
Technical_Notes/kernel.html

All Red Hat Enterprise Linux 5 users are advised to install these
updated packages, which address these vulnerabilities as well as
fixing the bugs and adding the enhancements noted in the Red Hat
Enterprise Linux 5.5 Release Notes and Technical Notes. The system
must be rebooted for this update to take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2009-4027.html
https://www.redhat.com/security/data/cve/CVE-2009-4307.html
https://www.redhat.com/security/data/cve/CVE-2010-0727.html
https://www.redhat.com/security/data/cve/CVE-2010-1188.html
http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.5/html/
http://rhn.redhat.com/errata/RHSA-2010-0178.html

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 5.8
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 46282 ()

Bugtraq ID: 37170

CVE ID: CVE-2007-6733
CVE-2009-4026
CVE-2009-4027
CVE-2009-4307
CVE-2010-0727
CVE-2010-1188