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RHSA-2012:0017: libxml2 security update

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RHSA-2012:0017: libxml2 security update

Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:C/A:C)
Published
09/02/2011
Created
07/25/2018
Added
01/26/2012
Modified
07/04/2017

Description

The libxml2 library is a development toolbox providing the implementationof various XML standards. One of those standards is the XML Path Language(XPath), which is a language for addressing parts of an XML document.A heap-based buffer overflow flaw was found in the way libxml2 decodedentity references with long names. A remote attacker could provide aspecially-crafted XML file that, when opened in an application linkedagainst libxml2, would cause the application to crash or, potentially,execute arbitrary code with the privileges of the user running theapplication. (CVE-2011-3919)An off-by-one error, leading to a heap-based buffer overflow, was found inthe way libxml2 parsed certain XML files. A remote attacker could provide aspecially-crafted XML file that, when opened in an application linkedagainst libxml2, would cause the application to crash or, potentially,execute arbitrary code with the privileges of the user running theapplication. (CVE-2011-0216)An integer overflow flaw, leading to a heap-based buffer overflow, wasfound in the way libxml2 parsed certain XPath expressions. If an attackerwere able to supply a specially-crafted XML file to an application usinglibxml2, as well as an XPath expression for that application to run againstthe crafted file, it could cause the application to crash or, possibly,execute arbitrary code. (CVE-2011-1944)Flaws were found in the way libxml2 parsed certain XPath expressions. If anattacker were able to supply a specially-crafted XML file to an applicationusing libxml2, as well as an XPath expression for that application to runagainst the crafted file, it could cause the application to crash.(CVE-2010-4008, CVE-2011-2834)An out-of-bounds memory read flaw was found in libxml2. A remote attackercould provide a specially-crafted XML file that, when opened in anapplication linked against libxml2, would cause the application to crash.(CVE-2011-3905)Note: Red Hat does not ship any applications that use libxml2 in a way thatwould allow the CVE-2011-1944, CVE-2010-4008, and CVE-2011-2834 flaws to beexploited; however, third-party applications may allow XPath expressions tobe passed which could trigger these flaws.Red Hat would like to thank the Google Security Team for reporting theCVE-2010-4008 issue. Upstream acknowledges Bui Quang Minh from Bkis as theoriginal reporter of CVE-2010-4008.All users of libxml2 are advised to upgrade to these updated packages,which contain backported patches to correct these issues. The desktop mustbe restarted (log out, then log back in) for this update to take effect.

Solution(s)

  • redhat-upgrade-libxml2
  • redhat-upgrade-libxml2-devel
  • redhat-upgrade-libxml2-python

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