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

Synopsis:          Important: libxml2 security update
Advisory ID:       RHSA-2012:0018-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-0018.html
Issue date:        2012-01-11
CVE Names:         CVE-2011-3905 CVE-2011-3919 
=====================================================================

1. Summary:

Updated libxml2 packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.

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

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)

An out-of-bounds memory read flaw was found in libxml2. 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.
(CVE-2011-3905)

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/):

767387 - CVE-2011-3905 libxml2 out of bounds read
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 Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/libxml2-2.7.6-4.el6_2.1.src.rpm

i386:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-python-2.7.6-4.el6_2.1.i686.rpm

x86_64:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-python-2.7.6-4.el6_2.1.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_2.1.src.rpm

i386:
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-static-2.7.6-4.el6_2.1.i686.rpm

x86_64:
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-static-2.7.6-4.el6_2.1.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_2.1.src.rpm

x86_64:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-python-2.7.6-4.el6_2.1.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_2.1.src.rpm

x86_64:
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-static-2.7.6-4.el6_2.1.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_2.1.src.rpm

i386:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-python-2.7.6-4.el6_2.1.i686.rpm

ppc64:
libxml2-2.7.6-4.el6_2.1.ppc.rpm
libxml2-2.7.6-4.el6_2.1.ppc64.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.ppc.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.ppc64.rpm
libxml2-devel-2.7.6-4.el6_2.1.ppc.rpm
libxml2-devel-2.7.6-4.el6_2.1.ppc64.rpm
libxml2-python-2.7.6-4.el6_2.1.ppc64.rpm

s390x:
libxml2-2.7.6-4.el6_2.1.s390.rpm
libxml2-2.7.6-4.el6_2.1.s390x.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.s390.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.s390x.rpm
libxml2-devel-2.7.6-4.el6_2.1.s390.rpm
libxml2-devel-2.7.6-4.el6_2.1.s390x.rpm
libxml2-python-2.7.6-4.el6_2.1.s390x.rpm

x86_64:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-python-2.7.6-4.el6_2.1.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_2.1.src.rpm

i386:
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-static-2.7.6-4.el6_2.1.i686.rpm

ppc64:
libxml2-debuginfo-2.7.6-4.el6_2.1.ppc64.rpm
libxml2-static-2.7.6-4.el6_2.1.ppc64.rpm

s390x:
libxml2-debuginfo-2.7.6-4.el6_2.1.s390x.rpm
libxml2-static-2.7.6-4.el6_2.1.s390x.rpm

x86_64:
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-static-2.7.6-4.el6_2.1.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_2.1.src.rpm

i386:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-python-2.7.6-4.el6_2.1.i686.rpm

x86_64:
libxml2-2.7.6-4.el6_2.1.i686.rpm
libxml2-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-devel-2.7.6-4.el6_2.1.i686.rpm
libxml2-devel-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-python-2.7.6-4.el6_2.1.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_2.1.src.rpm

i386:
libxml2-debuginfo-2.7.6-4.el6_2.1.i686.rpm
libxml2-static-2.7.6-4.el6_2.1.i686.rpm

x86_64:
libxml2-debuginfo-2.7.6-4.el6_2.1.x86_64.rpm
libxml2-static-2.7.6-4.el6_2.1.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-2011-3905.html
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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