{"id":"UBUNTU-CVE-2017-1000071","details":"Jasig phpCAS version 1.3.4 is vulnerable to an authentication bypass in the validateCAS20 function when configured to authenticate against an old CAS server.","modified":"2025-10-24T04:46:41Z","published":"2017-07-17T13:18:00Z","upstream":["CVE-2017-1000071"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-1000071"},{"type":"REPORT","url":"https://github.com/Jasig/phpCAS/issues/228"},{"type":"REPORT","url":"https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-1000071"}],"affected":[{"package":{"name":"php-cas","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/php-cas@1.3.3-2ubuntu1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.3-1","1.3.3-2","1.3.3-2ubuntu1","1.3.3-2ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"php-cas","binary_version":"1.3.3-2ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-1000071.json"}},{"package":{"name":"php-cas","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/php-cas@1.3.3-4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.3-4"],"ecosystem_specific":{"binaries":[{"binary_name":"php-cas","binary_version":"1.3.3-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-1000071.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}