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Red Hat Enterprise Linux 5 & 6: RHSA-2012:1512-01 Critical Buffer Underflow

red hat
Calendar Grey November 29, 2012
Scroller Redhat
The advisory from Red Hat outlines a significant libxml2 upgrade targeting a severe security vulnerability within Enterprise Linux environments.
Updated libxml2 packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6

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

Summary

The libxml2 library is a development toolbox providing the implementation of various XML standards.
A heap-based buffer underflow flaw was found in the way libxml2 decoded certain entities. A remote attacker could provide a specially-crafted XML file that, when opened in an application linked against libxml2, would cause the application to crash or, potentially, execute arbitrary code with the privileges of the user running the application. (CVE-2012-5134)
All users of libxml2 are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The desktop must be restarted (log out, then log back in) for this update to take effect.

Topics%20covered

Topics Covered

security advisory critical software update Red Hat Enterprise Linux important libxml2 buffer underflow

References

https://access.redhat.com/security/cve/CVE-2012-5134 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: libxml2-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-python-2.6.26-2.1.15.el5_8.6.i386.rpm
x86_64: libxml2-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-2.6.26-2.1.15.el5_8.6.x86_64.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.x86_64.rpm libxml2-python-2.6.26-2.1.15.el5_8.6.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-devel-2.6.26-2.1.15.el5_8.6.i386.rpm
x86_64: libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.x86_64.rpm libxml2-devel-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-devel-2.6.26-2.1.15.el5_8.6.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: libxml2-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-devel-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-python-2.6.26-2.1.15.el5_8.6.i386.rpm
ia64: libxml2-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-2.6.26-2.1.15.el5_8.6.ia64.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.i386.rpm libxml2-debuginfo-2.6.26-2.1.15.el5_8.6.ia64.rpm libxml2-devel-2.6.26-2.1.15.el5_8.6.ia64.rpm libxml2-python-2.6.26-2.1.15.el5_8.6.ia64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2012:1512-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1512.html
Issue date: 2012-11-29

Topic

Updated libxml2 packages that fix one security issue are now available forRed Hat Enterprise Linux 5 and 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory critical software update Red Hat Enterprise Linux important libxml2 buffer underflow

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

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

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

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

880466 - CVE-2012-5134 libxml2: Heap-buffer-underflow in xmlParseAttValueComplex

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