The xsltStylePreCompute function in preproc.c in libxslt 1.1.28 does not check if the parent node is an element, which allows attackers to cause a denial of service via a crafted XML file, related to a "type confusion" issue.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-7995
• https://bugzilla.redhat.com/show_bug.cgi?id=1257962
• https://git.gnome.org/browse/libxslt/commit/?id=7ca19df892ca22d9314e95d59ce2abdeff46b617
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
• https://puppet.com/security/cve/cve-2015-7995
• https://support.apple.com/HT205729
• https://support.apple.com/HT205731
• https://support.apple.com/HT205732
• https://support.apple.com/HT206168
• http://lists.apple.com/archives/security-announce/2016/Jan/msg00002.html
• http://lists.apple.com/archives/security-announce/2016/Jan/msg00003.html
• http://lists.apple.com/archives/security-announce/2016/Jan/msg00005.html
• http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html
• http://lists.opensuse.org/opensuse-updates/2016-05/msg00123.html
• http://www.debian.org/security/2016/dsa-3605
• http://www.openwall.com/lists/oss-security/2015/10/27/10
• http://www.openwall.com/lists/oss-security/2015/10/28/4
• http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
• http://www.securityfocus.com/bid/77325
• http://www.securitytracker.com/id/1034736
• http://www.securitytracker.com/id/1038623
• http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.386546