[RHSA-2011:1749-03] Low: libxml2 security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Low: libxml2 security and bug fix update

Advisory ID: RHSA-2011:1749-03

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1749.html

Issue date: 2011-12-06

CVE Names: CVE-2010-4008 CVE-2010-4494 CVE-2011-0216

CVE-2011-1944 CVE-2011-2821 CVE-2011-2834

=====================================================================

 

1. Summary:

 

Updated libxml2 packages that fix several security issues and various bugs

are now available for Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having low

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.

 

2. Relevant releases/architectures:

 

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

 

3. Description:

 

The libxml2 library is a development toolbox providing the implementation

of various XML standards. One of those standards is the XML Path Language

(XPath), which is a language for addressing parts of an XML document.

 

An off-by-one error, leading to a heap-based buffer overflow, was found in

the way libxml2 parsed certain XML files. 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-2011-0216)

 

An integer overflow flaw, leading to a heap-based buffer overflow, was

found in the way libxml2 parsed certain XPath expressions. If an attacker

were able to supply a specially-crafted XML file to an application using

libxml2, as well as an XPath expression for that application to run against

the crafted file, it could cause the application to crash or, possibly,

execute arbitrary code. (CVE-2011-1944)

 

Multiple flaws were found in the way libxml2 parsed certain XPath

expressions. If an attacker were able to supply a specially-crafted XML

file to an application using libxml2, as well as an XPath expression for

that application to run against the crafted file, it could cause the

application to crash. (CVE-2010-4008, CVE-2010-4494, CVE-2011-2821,

CVE-2011-2834)

 

Note: Red Hat does not ship any applications that use libxml2 in a way that

would allow the CVE-2011-1944, CVE-2010-4008, CVE-2010-4494, CVE-2011-2821,

and CVE-2011-2834 flaws to be exploited; however, third-party applications

may allow XPath expressions to be passed which could trigger these flaws.

 

Red Hat would like to thank the Google Security Team for reporting the

CVE-2010-4008 issue. Upstream acknowledges Bui Quang Minh from Bkis as the

original reporter of CVE-2010-4008.

 

This update also fixes the following bugs:

 

* A number of patches have been applied to harden the XPath processing code

in libxml2, such as fixing memory leaks, rounding errors, XPath numbers

evaluations, and a potential error in encoding conversion. (BZ#732335)

 

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.

 

4. 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/kb/docs/DOC-11259

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

645341 - CVE-2010-4008 libxml2: Crash (stack frame overflow or NULL pointer dereference) by traversal of XPath axis

665963 - CVE-2010-4494 libxml2: double-free in XPath processing code

709747 - CVE-2011-1944 libxml, libxml2: Heap-based buffer overflow by adding new namespace node to an existing nodeset or merging nodesets

724906 - CVE-2011-0216 libxml2: Off-by-one error leading to heap-based buffer overflow in encoding

732335 - Fix various problems and harden the XPath evaluation engine

735712 - CVE-2011-2821 libxml2: double free caused by malformed XPath expression in XSLT

735751 - CVE-2011-2834 libxml2: double-free caused by malformed XPath expression in XSLT

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-python-2.7.6-4.el6.i686.rpm

 

x86_64:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-2.7.6-4.el6.x86_64.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-python-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-static-2.7.6-4.el6.i686.rpm

 

x86_64:

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.x86_64.rpm

libxml2-static-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

x86_64:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-2.7.6-4.el6.x86_64.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-python-2.7.6-4.el6.x86_64.rpm

 

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

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

x86_64:

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.x86_64.rpm

libxml2-static-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-python-2.7.6-4.el6.i686.rpm

 

ppc64:

libxml2-2.7.6-4.el6.ppc.rpm

libxml2-2.7.6-4.el6.ppc64.rpm

libxml2-debuginfo-2.7.6-4.el6.ppc.rpm

libxml2-debuginfo-2.7.6-4.el6.ppc64.rpm

libxml2-devel-2.7.6-4.el6.ppc.rpm

libxml2-devel-2.7.6-4.el6.ppc64.rpm

libxml2-python-2.7.6-4.el6.ppc64.rpm

 

s390x:

libxml2-2.7.6-4.el6.s390.rpm

libxml2-2.7.6-4.el6.s390x.rpm

libxml2-debuginfo-2.7.6-4.el6.s390.rpm

libxml2-debuginfo-2.7.6-4.el6.s390x.rpm

libxml2-devel-2.7.6-4.el6.s390.rpm

libxml2-devel-2.7.6-4.el6.s390x.rpm

libxml2-python-2.7.6-4.el6.s390x.rpm

 

x86_64:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-2.7.6-4.el6.x86_64.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.x86_64.rpm

libxml2-python-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-static-2.7.6-4.el6.i686.rpm

 

ppc64:

libxml2-debuginfo-2.7.6-4.el6.ppc64.rpm

libxml2-static-2.7.6-4.el6.ppc64.rpm

 

s390x:

libxml2-debuginfo-2.7.6-4.el6.s390x.rpm

libxml2-static-2.7.6-4.el6.s390x.rpm

 

x86_64:

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-static-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-python-2.7.6-4.el6.i686.rpm

 

x86_64:

libxml2-2.7.6-4.el6.i686.rpm

libxml2-2.7.6-4.el6.x86_64.rpm

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-devel-2.7.6-4.el6.i686.rpm

libxml2-devel-2.7.6-4.el6.x86_64.rpm

libxml2-python-2.7.6-4.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/libxml2-2.7.6-4.el6.src.rpm

 

i386:

libxml2-debuginfo-2.7.6-4.el6.i686.rpm

libxml2-static-2.7.6-4.el6.i686.rpm

 

x86_64:

libxml2-debuginfo-2.7.6-4.el6.x86_64.rpm

libxml2-static-2.7.6-4.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2010-4008.html

https://www.redhat.com/security/data/cve/CVE-2010-4494.html

https://www.redhat.com/security/data/cve/CVE-2011-0216.html

https://www.redhat.com/security/data/cve/CVE-2011-1944.html

https://www.redhat.com/security/data/cve/CVE-2011-2821.html

https://www.redhat.com/security/data/cve/CVE-2011-2834.html

https://access.redhat.com/security/updates/classification/#low

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2011 Red Hat, Inc.

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