{"id":"UBUNTU-CVE-2016-4553","details":"client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.","modified":"2026-01-30T01:15:27.413313Z","published":"2016-05-10T00:00:00Z","related":["USN-2995-1"],"upstream":["CVE-2016-4553"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-4553"},{"type":"REPORT","url":"http://www.squid-cache.org/Advisories/SQUID-2016_7.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2995-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-4553"}],"affected":[{"package":{"name":"squid3","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.3.8-1ubuntu6.8?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.8-1ubuntu6.8"}]}],"versions":["3.3.8-1ubuntu3","3.3.8-1ubuntu4","3.3.8-1ubuntu5","3.3.8-1ubuntu6","3.3.8-1ubuntu6.1","3.3.8-1ubuntu6.2","3.3.8-1ubuntu6.3","3.3.8-1ubuntu6.4","3.3.8-1ubuntu6.6"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"3.3.8-1ubuntu6.8"},{"binary_name":"squid-cgi","binary_version":"3.3.8-1ubuntu6.8"},{"binary_name":"squid-purge","binary_version":"3.3.8-1ubuntu6.8"},{"binary_name":"squid3","binary_version":"3.3.8-1ubuntu6.8"},{"binary_name":"squid3-common","binary_version":"3.3.8-1ubuntu6.8"},{"binary_name":"squidclient","binary_version":"3.3.8-1ubuntu6.8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-4553.json"}},{"package":{"name":"squid3","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.12-1ubuntu7.2"}]}],"versions":["3.3.8-1ubuntu16","3.3.8-1ubuntu17","3.5.12-1ubuntu6","3.5.12-1ubuntu7","3.5.12-1ubuntu7.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"3.5.12-1ubuntu7.2"},{"binary_name":"squid-cgi","binary_version":"3.5.12-1ubuntu7.2"},{"binary_name":"squid-common","binary_version":"3.5.12-1ubuntu7.2"},{"binary_name":"squid-purge","binary_version":"3.5.12-1ubuntu7.2"},{"binary_name":"squid3","binary_version":"3.5.12-1ubuntu7.2"},{"binary_name":"squidclient","binary_version":"3.5.12-1ubuntu7.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-4553.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}