{"id":"UBUNTU-CVE-2014-3660","details":"parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the \"billion laughs\" attack.","modified":"2026-02-04T04:32:52.252747Z","published":"2014-10-16T00:00:00Z","related":["USN-2389-1"],"upstream":["CVE-2014-3660"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2014-3660"},{"type":"REPORT","url":"https://rhn.redhat.com/errata/RHSA-2014-1655.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2389-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2014-3660"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libxml2@2.9.1+dfsg1-3ubuntu4.4?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1+dfsg1-3ubuntu4.4"}]}],"versions":["2.9.1+dfsg1-3ubuntu2","2.9.1+dfsg1-3ubuntu3","2.9.1+dfsg1-3ubuntu4","2.9.1+dfsg1-3ubuntu4.1","2.9.1+dfsg1-3ubuntu4.2","2.9.1+dfsg1-3ubuntu4.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.9.1+dfsg1-3ubuntu4.4","binary_name":"libxml2"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.4","binary_name":"libxml2-dev"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.4","binary_name":"libxml2-utils"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.4","binary_name":"python-libxml2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2014/UBUNTU-CVE-2014-3660.json"}}],"schema_version":"1.7.3","severity":[{"type":"Ubuntu","score":"medium"}]}