{"id":"UBUNTU-CVE-2017-16931","details":"parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.","modified":"2025-07-16T08:20:53.674150Z","published":"2017-11-23T21:29:00Z","withdrawn":"2025-07-18T16:44:15Z","upstream":["CVE-2017-16931"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-16931"},{"type":"REPORT","url":"http://xmlsoft.org/news.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-16931"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libxml2@2.9.1+dfsg1-3ubuntu4.10?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.1+dfsg1-3ubuntu4.10"}]}],"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","2.9.1+dfsg1-3ubuntu4.4","2.9.1+dfsg1-3ubuntu4.5","2.9.1+dfsg1-3ubuntu4.6","2.9.1+dfsg1-3ubuntu4.7","2.9.1+dfsg1-3ubuntu4.8","2.9.1+dfsg1-3ubuntu4.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-dbg"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-dbgsym"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-dev"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-dev-dbgsym"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-doc"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-udeb"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-udeb-dbgsym"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-utils"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-utils-dbg"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"libxml2-utils-dbgsym"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"python-libxml2"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"python-libxml2-dbg"},{"binary_version":"2.9.1+dfsg1-3ubuntu4.10","binary_name":"python-libxml2-dbgsym"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-16931.json"}},{"package":{"name":"libxml2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libxml2@2.9.3+dfsg1-1ubuntu0.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.3+dfsg1-1ubuntu0.3"}]}],"versions":["2.9.2+zdfsg1-4","2.9.2+zdfsg1-4ubuntu1","2.9.2+zdfsg1-4ubuntu2","2.9.2+zdfsg1-4ubuntu3","2.9.3+dfsg1-1","2.9.3+dfsg1-1ubuntu0.1","2.9.3+dfsg1-1ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-dbg"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-dbgsym"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-dev"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-dev-dbgsym"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-doc"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-udeb"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-udeb-dbgsym"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-utils"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-utils-dbg"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"libxml2-utils-dbgsym"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"python-libxml2"},{"binary_version":"2.9.3+dfsg1-1ubuntu0.3","binary_name":"python-libxml2-dbg"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-16931.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}