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Red Hat: RHSA-2014:1885-01 Moderate: Libxml2 DoS Flaw Fix

red hat
Calendar Grey November 20, 2014
Dist Redhat Esm H88
A slight enhancement for libxml2 in RHEL addresses a potential DoS threat arising from excessive entity expansion within XML documents.
Updated libxml2 packages that fix one security issue 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/articles/11258

Summary

The libxml2 library is a development toolbox providing the implementation of various XML standards.
A denial of service flaw was found in libxml2, a library providing support to read, modify and write XML and HTML files. A remote attacker could provide a specially crafted XML file that, when processed by an application using libxml2, would lead to excessive CPU consumption (denial of service) based on excessive entity substitutions, even if entity substitution was disabled, which is the parser default behavior. (CVE-2014-3660)
All libxml2 users 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 moderate security update Red Hat DoS libxml2

References

https://access.redhat.com/security/cve/CVE-2014-3660 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source: libxml2-2.6.26-2.1.25.el5_11.src.rpm
i386: libxml2-2.6.26-2.1.25.el5_11.i386.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-python-2.6.26-2.1.25.el5_11.i386.rpm
x86_64: libxml2-2.6.26-2.1.25.el5_11.i386.rpm libxml2-2.6.26-2.1.25.el5_11.x86_64.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.x86_64.rpm libxml2-python-2.6.26-2.1.25.el5_11.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source: libxml2-2.6.26-2.1.25.el5_11.src.rpm
i386: libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-devel-2.6.26-2.1.25.el5_11.i386.rpm
x86_64: libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.x86_64.rpm libxml2-devel-2.6.26-2.1.25.el5_11.i386.rpm libxml2-devel-2.6.26-2.1.25.el5_11.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: libxml2-2.6.26-2.1.25.el5_11.src.rpm
i386: libxml2-2.6.26-2.1.25.el5_11.i386.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-devel-2.6.26-2.1.25.el5_11.i386.rpm libxml2-python-2.6.26-2.1.25.el5_11.i386.rpm
ia64: libxml2-2.6.26-2.1.25.el5_11.i386.rpm libxml2-2.6.26-2.1.25.el5_11.ia64.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.i386.rpm libxml2-debuginfo-2.6.26-2.1.25.el5_11.ia64.rpm

Read the Full Advisory


Advisory ID: RHSA-2014:1885-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:1885.html
Issue date: 2014-11-20

Topic

Updated libxml2 packages that fix one security issue are now available forRed Hat Enterprise Linux 5.Red Hat Product Security has rated this update as having Moderate securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat DoS 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

Bugs Fixed

1149084 - CVE-2014-3660 libxml2: denial of service via recursive entity expansion

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