{"id":"UBUNTU-CVE-2015-5523","details":"The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, which triggers a large memory allocation.","modified":"2026-04-22T10:13:44.252166Z","published":"2015-07-16T00:00:00Z","related":["USN-2695-1"],"upstream":["CVE-2015-5523"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-5523"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2015/06/04/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2695-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-5523"}],"affected":[{"package":{"name":"tidy","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/tidy@20091223cvs-1.2ubuntu1.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20091223cvs-1.2ubuntu1.1"}]}],"versions":["20091223cvs-1.2","20091223cvs-1.2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"20091223cvs-1.2ubuntu1.1","binary_name":"libtidy-0.99-0"},{"binary_version":"20091223cvs-1.2ubuntu1.1","binary_name":"tidy"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-5523.json"}}],"schema_version":"1.7.5","severity":[{"type":"Ubuntu","score":"low"}]}