SUSE-SU-2016:1205-1: moderate: Security update for libxml2

[sle-updates at lists.suse.com]

   SUSE Security Update: Security update for libxml2
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Announcement ID:    SUSE-SU-2016:1205-1
Rating:             moderate
References:         #972335 #975947 
Cross-References:   CVE-2016-3627
Affected Products:
                    SUSE Linux Enterprise Software Development Kit 11-SP4
                    SUSE Linux Enterprise Server 11-SP4
                    SUSE Linux Enterprise Debuginfo 11-SP4
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   An update that solves one vulnerability and has one errata
   is now available.

Description:

   This update for libxml2 fixes two security issues:

   - libxml2 limits the number of recursions an XML document can contain so
     to protect against the "Billion Laughs" denial-of-service attack.
     Unfortunately, the underlying counter was not incremented properly in
     all necessary locations. Therefore, specially crafted XML documents
     could exhaust all available stack space and crash the XML parser without
     running into the recursion limit. This vulnerability has been fixed.
     (bsc#975947)

   - When running in recovery mode, certain invalid XML documents would
     trigger an infinite recursion in libxml2 that ran until all stack space
     was exhausted. This vulnerability could have been used to facilitate a
     denial-of-sevice attack. (CVE-2016-3627, bsc#972335)


Patch Instructions:

   To install this SUSE Security Update use YaST online_update.
   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Software Development Kit 11-SP4:

      zypper in -t patch sdksp4-libxml2-12538=1

   - SUSE Linux Enterprise Server 11-SP4:

      zypper in -t patch slessp4-libxml2-12538=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-libxml2-12538=1

   To bring your system up-to-date, use "zypper patch".


Package List:

   - SUSE Linux Enterprise Software Development Kit 11-SP4 (i586 ia64 ppc64 s390x x86_64):

      libxml2-devel-2.7.6-0.40.1

   - SUSE Linux Enterprise Software Development Kit 11-SP4 (ppc64 s390x x86_64):

      libxml2-devel-32bit-2.7.6-0.40.1

   - SUSE Linux Enterprise Server 11-SP4 (i586 ia64 ppc64 s390x x86_64):

      libxml2-2.7.6-0.40.1
      libxml2-doc-2.7.6-0.40.1
      libxml2-python-2.7.6-0.40.3

   - SUSE Linux Enterprise Server 11-SP4 (ppc64 s390x x86_64):

      libxml2-32bit-2.7.6-0.40.1

   - SUSE Linux Enterprise Server 11-SP4 (ia64):

      libxml2-x86-2.7.6-0.40.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ia64 ppc64 s390x x86_64):

      libxml2-debuginfo-2.7.6-0.40.1
      libxml2-debugsource-2.7.6-0.40.1
      libxml2-python-debuginfo-2.7.6-0.40.3
      libxml2-python-debugsource-2.7.6-0.40.3


References:

   https://www.suse.com/security/cve/CVE-2016-3627.html
   https://bugzilla.suse.com/972335
   https://bugzilla.suse.com/975947