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Red Hat: Critical Libxml2 Security Vulnerability RHSA-2013:2575-01 Resolved

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Calendar Grey September 18, 2012
Scroller Redhat
Critical libxml2 patch released for CentOS addressing various vulnerabilities. Update recommended!
Updated libxml2 packages that fix multiple security issues 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/articles/11258

Summary

The libxml2 library is a development toolbox providing the implementation of various XML standards.
Multiple integer overflow flaws, leading to heap-based buffer overflows, were found in the way libxml2 handled documents that enable entity expansion. A remote attacker could provide a large, 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-2012-2807)
A one byte buffer overflow was found in the way libxml2 evaluated certain parts of XML Pointer Language (XPointer) expressions. 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-2011-3102)
All users of libxml2 are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The desktop must be restarted (log out, then log back in) for this update to take effect.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat buffer overflow threat mitigation libxml2

References

https://access.redhat.com/security/cve/CVE-2011-3102 https://access.redhat.com/security/cve/CVE-2012-2807 https://access.redhat.com/security/updates/classification#moderate

Package List

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


Read the Full Advisory


Advisory ID: RHSA-2012:1288-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1288.html
Issue date: 2012-09-18

Topic

Updated libxml2 packages that fix multiple security issues are nowavailable for Red Hat Enterprise Linux 5 and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat buffer overflow threat mitigation libxml2

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

822109 - CVE-2011-3102 libxml: An off-by-one out-of-bounds write by XPointer part evaluation

835863 - CVE-2012-2807 libxml2 (64-bit): Multiple integer overflows, leading to DoS or possibly other unspecified impact

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