libxml2 2.7.0 and 2.7.1 does not properly handle "predefined entities definitions" in entities, which allows context-dependent attackers to cause a denial of service (memory consumption and application crash), as demonstrated by use of xmllint on a certain XML document, a different vulnerability than CVE-2003-1564 and CVE-2008-3281.
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00130.html
https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00125.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/45633
http://www.vupen.com/english/advisories/2009/1621
http://www.vupen.com/english/advisories/2009/1522
http://www.securityfocus.com/bid/31555
http://www.mandriva.com/security/advisories?name=MDVSA-2008:212
http://support.apple.com/kb/HT3639
http://support.apple.com/kb/HT3613
http://security.gentoo.org/glsa/glsa-200812-06.xml
http://secunia.com/advisories/35379
http://secunia.com/advisories/32974
http://secunia.com/advisories/32175
http://secunia.com/advisories/32130
http://openwall.com/lists/oss-security/2008/10/02/4
http://lists.apple.com/archives/security-announce/2009/jun/msg00002.html
http://lists.apple.com/archives/security-announce/2009/Jun/msg00005.html