RHSA-2012:1265: Important: libxslt security update

libxslt is a library for transforming XML files into other textual formats(including HTML, plain text, and other XML representations of theunderlying data) using the standard XSLT stylesheet transformationmechanism.A heap-based buffer overflow flaw was found in the way libxslt appliedtemplates to nodes selected by certain namespaces. An attacker could usethis flaw to create a malicious XSL file that, when used by an applicationlinked against libxslt to perform an XSL transformation, could cause theapplication to crash or, possibly, execute arbitrary code with theprivileges of the user running the application. (CVE-2012-2871)Several denial of service flaws were found in libxslt. An attacker coulduse these flaws to create a malicious XSL file that, when used by anapplication linked against libxslt to perform an XSL transformation, couldcause the application to crash. (CVE-2012-2825, CVE-2012-2870,CVE-2011-3970)An information leak could occur if an application using libxslt processedan untrusted XPath expression, or used a malicious XSL file to perform anXSL transformation. If combined with other flaws, this leak could possiblyhelp an attacker bypass intended memory corruption protections.(CVE-2011-1202)All libxslt users are advised to upgrade to these updated packages, whichcontain backported patches to resolve these issues. All runningapplications linked against libxslt must be restarted for this update totake effect.