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Category:   Application (Generic)  >   Libxml2 Vendors:   xmlsoft.org
(Red Hat Issues Fix for libxml2) Google Chrome Multiple Flaws Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1026653
SecurityTracker URL:  http://securitytracker.com/id/1026653
CVE Reference:   CVE-2011-3919   (Links to External Site)
Date:  Feb 8 2012
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 16.0.912.75
Description:   Several vulnerabilities were reported in Google Chrome. A remote user can cause arbitrary code to be executed on the target user's system. libxml2 is affected by one vulnerability.

A remote user can create specially crafted content that, when loaded by the target user, will execute arbitrary code on the target system. The code will run with the privileges of the target user.

Specially crafted animation frames can trigger a use-after-free memory error [CVE-2011-3921]. Boris Zbarsky of Mozilla reported this vulnerability.

A remote user can trigger a heap overflow in libxml [CVE-2011-3919]. Juri Aedla reported this vulnerability.

A remote user can trigger a stack overflow in glyph handling [CVE-2011-3922]. The Google Chrome Security Team (Cris Neckar) reported this vulnerability.

A remote user can trigger a use-after-free in Safe Browsing navigation [CVE-2011-3925]. Chamal de Silva reported this vulnerability.


Impact:   A remote user can create HTML that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   Red Hat has issued a fix for libxml2.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-0104.html
Cause:   Access control error, Boundary error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 6 2012 Google Chrome Multiple Flaws Let Remote Users Execute Arbitrary Code


 Source Message Contents
Date:  Wed, 8 Feb 2012 20:12:25 +0000
Subject:  [RHSA-2012:0104-01] Important: libxml2 security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: libxml2 security update
Advisory ID:       RHSA-2012:0104-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-0104.html
Issue date:        2012-02-08
CVE Names:         CVE-2011-3919 
=====================================================================

1. Summary:

Updated libxml2 packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.6 Extended Update Support.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux EUS (v. 5.6 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

The libxml2 library is a development toolbox providing the implementation
of various XML standards.

A heap-based buffer overflow flaw was found in the way libxml2 decoded
entity references with long names. 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-2011-3919)

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.

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/):

771896 - CVE-2011-3919 libxml2: Heap-based buffer overflow when decoding an entity reference with a long name

6. Package List:

Red Hat Enterprise Linux EUS (v. 5.6 server):

Source:
libxml2-2.6.26-2.1.2.8.el5_6.2.src.rpm

i386:
libxml2-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-python-2.6.26-2.1.2.8.el5_6.2.i386.rpm

ia64:
libxml2-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-2.6.26-2.1.2.8.el5_6.2.ia64.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.ia64.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.ia64.rpm
libxml2-python-2.6.26-2.1.2.8.el5_6.2.ia64.rpm

ppc:
libxml2-2.6.26-2.1.2.8.el5_6.2.ppc.rpm
libxml2-2.6.26-2.1.2.8.el5_6.2.ppc64.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.ppc.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.ppc64.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.ppc.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.ppc64.rpm
libxml2-python-2.6.26-2.1.2.8.el5_6.2.ppc.rpm

s390x:
libxml2-2.6.26-2.1.2.8.el5_6.2.s390.rpm
libxml2-2.6.26-2.1.2.8.el5_6.2.s390x.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.s390.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.s390x.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.s390.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.s390x.rpm
libxml2-python-2.6.26-2.1.2.8.el5_6.2.s390x.rpm

x86_64:
libxml2-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-2.6.26-2.1.2.8.el5_6.2.x86_64.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-debuginfo-2.6.26-2.1.2.8.el5_6.2.x86_64.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.i386.rpm
libxml2-devel-2.6.26-2.1.2.8.el5_6.2.x86_64.rpm
libxml2-python-2.6.26-2.1.2.8.el5_6.2.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-2011-3919.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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