The REXML parser in Ruby 1.9.x before 1.9.3 patchlevel 551, 2.0.x before 2.0.0 patchlevel 598, and 2.1.x before 2.1.5 allows remote attackers to cause a denial of service (CPU and memory consumption) a crafted XML document containing an empty string in an entity that is used in a large number of nested entity references, aka an XML Entity Expansion (XEE) attack. NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-1821 and CVE-2014-8080.
advisories.mageia.org/MGASA-2014-0472.html
lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
lists.opensuse.org/opensuse-updates/2014-12/msg00035.html
lists.opensuse.org/opensuse-updates/2015-01/msg00000.html
lists.opensuse.org/opensuse-updates/2015-01/msg00004.html
rhn.redhat.com/errata/RHSA-2014-1911.html
rhn.redhat.com/errata/RHSA-2014-1912.html
rhn.redhat.com/errata/RHSA-2014-1913.html
rhn.redhat.com/errata/RHSA-2014-1914.html
secunia.com/advisories/59948
secunia.com/advisories/62050
secunia.com/advisories/62748
www.debian.org/security/2015/dsa-3157
www.debian.org/security/2015/dsa-3159
www.mandriva.com/security/advisories?name=MDVSA-2015:129
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www.securityfocus.com/bid/71230
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