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Red Hat Enterprise Linux 5 RHSA-2012:1445-01 Low: ext4 DoS Fix

red hat
Calendar Grey November 13, 2012
Dist Redhat Esm H88
Red Hat Security Advisory Synopsis: Low: kernel security and bug fix update Advisory ID: RHSA-2012:1
Updated kernel packages that fix one security issue and several bugs are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issue:
* It was found that the RHSA-2010:0178 update did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. (CVE-2012-2100, Low)
This update also fixes several bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section.
Users should upgrade to these updated packages, which contain backported patches to correct this issue, and fix the bugs noted in the Technical Notes. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory kernel update Red Hat Enterprise Linux low severity Denial of Service ext4 fix

References

https://access.redhat.com/security/cve/CVE-2012-2100 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/errata/RHSA-2010:0178.html

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: kernel-2.6.18-308.20.1.el5.i686.rpm kernel-PAE-2.6.18-308.20.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-308.20.1.el5.i686.rpm kernel-PAE-devel-2.6.18-308.20.1.el5.i686.rpm kernel-debug-2.6.18-308.20.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-308.20.1.el5.i686.rpm kernel-debug-devel-2.6.18-308.20.1.el5.i686.rpm kernel-debuginfo-2.6.18-308.20.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-308.20.1.el5.i686.rpm kernel-devel-2.6.18-308.20.1.el5.i686.rpm kernel-headers-2.6.18-308.20.1.el5.i386.rpm kernel-xen-2.6.18-308.20.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-308.20.1.el5.i686.rpm kernel-xen-devel-2.6.18-308.20.1.el5.i686.rpm
noarch: kernel-doc-2.6.18-308.20.1.el5.noarch.rpm
x86_64: kernel-2.6.18-308.20.1.el5.x86_64.rpm kernel-debug-2.6.18-308.20.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-308.20.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-308.20.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-308.20.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-308.20.1.el5.x86_64.rpm kernel-devel-2.6.18-308.20.1.el5.x86_64.rpm kernel-headers-2.6.18-308.20.1.el5.x86_64.rpm kernel-xen-2.6.18-308.20.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-308.20.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-308.20.1.el5.x86_64.rpm


Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2012:1445-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1445.html
Issue date: 2012-11-13

Topic

Updated kernel packages that fix one security issue and several bugs arenow available for Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having lowsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory kernel update Red Hat Enterprise Linux low severity Denial of Service ext4 fix

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64

Bugs Fixed

809687 - CVE-2012-2100 kernel: ext4: fix inconsistency in ext4_fill_flex_info()

859946 - kernel: xen: change the default behaviour of CVE-2012-2934 fix [rhel-5.8.z]

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