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

Synopsis:          Moderate: libxml2 security update
Advisory ID:       RHSA-2015:2549-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-2549.html
Issue date:        2015-12-07
CVE Names:         CVE-2015-5312 CVE-2015-7497 CVE-2015-7498 
                   CVE-2015-7499 CVE-2015-7500 CVE-2015-7941 
                   CVE-2015-7942 CVE-2015-8241 CVE-2015-8242 
                   CVE-2015-8317 
=====================================================================

1. Summary:

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

Red Hat Product Security has rated this update as having Moderate 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.

Several denial of service flaws were found in libxml2, a library providing
support for reading, modifying, and writing XML and HTML files. A remote
attacker could provide a specially crafted XML or HTML file that, when
processed by an application using libxml2, would cause that application to
use an excessive amount of CPU, leak potentially sensitive information, or
in certain cases crash the application. (CVE-2015-5312, CVE-2015-7497,
CVE-2015-7498, CVE-2015-7499, CVE-2015-7500 CVE-2015-7941, CVE-2015-7942,
CVE-2015-8241, CVE-2015-8242, CVE-2015-8317, BZ#1213957, BZ#1281955)

Red Hat would like to thank the GNOME project for reporting CVE-2015-7497,
CVE-2015-7498, CVE-2015-7499, CVE-2015-7500, CVE-2015-8241, CVE-2015-8242,
and CVE-2015-8317. Upstream acknowledges Kostya Serebryany of Google as the
original reporter of CVE-2015-7497, CVE-2015-7498, CVE-2015-7499, and
CVE-2015-7500; Hugh Davenport as the original reporter of CVE-2015-8241 and
CVE-2015-8242; and Hanno Boeck as the original reporter of CVE-2015-8317.

All libxml2 users are advised to upgrade to these updated packages, which
contain a backported patch 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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1213957 - libxml2: out-of-bounds memory access when parsing an unclosed HTML comment
1274222 - CVE-2015-7941 libxml2: Out-of-bounds memory access
1276297 - CVE-2015-7942 libxml2: heap-based buffer overflow in xmlParseConditionalSections()
1276693 - CVE-2015-5312 libxml2: CPU exhaustion when processing specially crafted XML input
1281862 - CVE-2015-7497 libxml2: Heap-based buffer overflow in xmlDictComputeFastQKey
1281879 - CVE-2015-7498 libxml2: Heap-based buffer overflow in xmlParseXmlDecl
1281925 - CVE-2015-7499 libxml2: Heap-based buffer overflow in xmlGROW
1281930 - CVE-2015-8317 libxml2: Out-of-bounds heap read when parsing file with unfinished xml declaration
1281936 - CVE-2015-8241 libxml2: Buffer overread with XML parser in xmlNextChar
1281943 - CVE-2015-7500 libxml2: Heap buffer overflow in xmlParseMisc
1281950 - CVE-2015-8242 libxml2: Buffer overread with HTML parser in push mode in xmlSAX2TextNode
1281955 - libxml2: Multiple out-of-bounds reads in xmlDictComputeFastKey.isra.2 and xmlDictAddString.isra.O

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
libxml2-2.7.6-20.el6_7.1.src.rpm

i386:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-python-2.7.6-20.el6_7.1.i686.rpm

x86_64:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-python-2.7.6-20.el6_7.1.x86_64.rpm

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

i386:
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-static-2.7.6-20.el6_7.1.i686.rpm

x86_64:
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-static-2.7.6-20.el6_7.1.x86_64.rpm

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

Source:
libxml2-2.7.6-20.el6_7.1.src.rpm

x86_64:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-python-2.7.6-20.el6_7.1.x86_64.rpm

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

x86_64:
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-static-2.7.6-20.el6_7.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
libxml2-2.7.6-20.el6_7.1.src.rpm

i386:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-python-2.7.6-20.el6_7.1.i686.rpm

ppc64:
libxml2-2.7.6-20.el6_7.1.ppc.rpm
libxml2-2.7.6-20.el6_7.1.ppc64.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.ppc.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.ppc64.rpm
libxml2-devel-2.7.6-20.el6_7.1.ppc.rpm
libxml2-devel-2.7.6-20.el6_7.1.ppc64.rpm
libxml2-python-2.7.6-20.el6_7.1.ppc64.rpm

s390x:
libxml2-2.7.6-20.el6_7.1.s390.rpm
libxml2-2.7.6-20.el6_7.1.s390x.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.s390.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.s390x.rpm
libxml2-devel-2.7.6-20.el6_7.1.s390.rpm
libxml2-devel-2.7.6-20.el6_7.1.s390x.rpm
libxml2-python-2.7.6-20.el6_7.1.s390x.rpm

x86_64:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-python-2.7.6-20.el6_7.1.x86_64.rpm

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

i386:
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-static-2.7.6-20.el6_7.1.i686.rpm

ppc64:
libxml2-debuginfo-2.7.6-20.el6_7.1.ppc64.rpm
libxml2-static-2.7.6-20.el6_7.1.ppc64.rpm

s390x:
libxml2-debuginfo-2.7.6-20.el6_7.1.s390x.rpm
libxml2-static-2.7.6-20.el6_7.1.s390x.rpm

x86_64:
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-static-2.7.6-20.el6_7.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
libxml2-2.7.6-20.el6_7.1.src.rpm

i386:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-python-2.7.6-20.el6_7.1.i686.rpm

x86_64:
libxml2-2.7.6-20.el6_7.1.i686.rpm
libxml2-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-devel-2.7.6-20.el6_7.1.i686.rpm
libxml2-devel-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-python-2.7.6-20.el6_7.1.x86_64.rpm

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

i386:
libxml2-debuginfo-2.7.6-20.el6_7.1.i686.rpm
libxml2-static-2.7.6-20.el6_7.1.i686.rpm

x86_64:
libxml2-debuginfo-2.7.6-20.el6_7.1.x86_64.rpm
libxml2-static-2.7.6-20.el6_7.1.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/

7. References:

https://access.redhat.com/security/cve/CVE-2015-5312
https://access.redhat.com/security/cve/CVE-2015-7497
https://access.redhat.com/security/cve/CVE-2015-7498
https://access.redhat.com/security/cve/CVE-2015-7499
https://access.redhat.com/security/cve/CVE-2015-7500
https://access.redhat.com/security/cve/CVE-2015-7941
https://access.redhat.com/security/cve/CVE-2015-7942
https://access.redhat.com/security/cve/CVE-2015-8241
https://access.redhat.com/security/cve/CVE-2015-8242
https://access.redhat.com/security/cve/CVE-2015-8317
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2015 Red Hat, Inc.
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