Security update for libxml2

SUSE Security Update: Security update for libxml2
Announcement ID: SUSE-SU-2016:1205-1
Rating: moderate
References: #972335 #975947
Affected Products:
  • SUSE Linux Enterprise Software Development Kit 11-SP4
  • SUSE Linux Enterprise Server 11-SP4
  • SUSE Linux Enterprise Debuginfo 11-SP4
    		•

    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: