{"id":"USN-8688-1","summary":"pam vulnerability","details":"Juthawong Naisanguansee discovered that PAM incorrectly cleared failed\nlogin attempt records when certain services invoked the account phase\nwithout first performing authentication. An attacker could possibly use\nthis issue to reset failed login counters, resulting in authentication\nlockout restrictions being bypassed.","modified":"2026-08-31T17:16:06.871331742Z","published":"2026-08-27T19:43:08Z","references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8688-1"},{"type":"REPORT","url":"https://launchpad.net/bugs/2164901"}],"affected":[{"package":{"name":"pam","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pam?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.8-3.6ubuntu2.18.04.6+esm2"}]}],"versions":["1.1.8-3.2ubuntu3","1.1.8-3.2ubuntu4","1.1.8-3.6ubuntu1","1.1.8-3.6ubuntu2","1.1.8-3.6ubuntu2.18.04.1","1.1.8-3.6ubuntu2.18.04.2","1.1.8-3.6ubuntu2.18.04.3","1.1.8-3.6ubuntu2.18.04.4","1.1.8-3.6ubuntu2.18.04.6","1.1.8-3.6ubuntu2.18.04.6+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-cracklib","binary_version":"1.1.8-3.6ubuntu2.18.04.6+esm2"},{"binary_version":"1.1.8-3.6ubuntu2.18.04.6+esm2","binary_name":"libpam-modules"},{"binary_version":"1.1.8-3.6ubuntu2.18.04.6+esm2","binary_name":"libpam-modules-bin"},{"binary_name":"libpam-runtime","binary_version":"1.1.8-3.6ubuntu2.18.04.6+esm2"},{"binary_name":"libpam0g","binary_version":"1.1.8-3.6ubuntu2.18.04.6+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8688-1.json"}},{"package":{"name":"pam","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/pam?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.1-5ubuntu4.7+esm1"}]}],"versions":["1.3.1-5ubuntu1","1.3.1-5ubuntu3","1.3.1-5ubuntu4","1.3.1-5ubuntu4.1","1.3.1-5ubuntu4.2","1.3.1-5ubuntu4.3","1.3.1-5ubuntu4.4","1.3.1-5ubuntu4.6","1.3.1-5ubuntu4.7"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.1-5ubuntu4.7+esm1","binary_name":"libpam-cracklib"},{"binary_name":"libpam-modules","binary_version":"1.3.1-5ubuntu4.7+esm1"},{"binary_version":"1.3.1-5ubuntu4.7+esm1","binary_name":"libpam-modules-bin"},{"binary_name":"libpam-runtime","binary_version":"1.3.1-5ubuntu4.7+esm1"},{"binary_version":"1.3.1-5ubuntu4.7+esm1","binary_name":"libpam0g"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8688-1.json"}},{"package":{"name":"pam","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pam?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.0-11ubuntu2.8"}]}],"versions":["1.3.1-5ubuntu11","1.4.0-10ubuntu1","1.4.0-10ubuntu2","1.4.0-11ubuntu1","1.4.0-11ubuntu2","1.4.0-11ubuntu2.1","1.4.0-11ubuntu2.3","1.4.0-11ubuntu2.4","1.4.0-11ubuntu2.5","1.4.0-11ubuntu2.6","1.4.0-11ubuntu2.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.4.0-11ubuntu2.8","binary_name":"libpam-cracklib"},{"binary_name":"libpam-modules","binary_version":"1.4.0-11ubuntu2.8"},{"binary_name":"libpam-modules-bin","binary_version":"1.4.0-11ubuntu2.8"},{"binary_version":"1.4.0-11ubuntu2.8","binary_name":"libpam-runtime"},{"binary_name":"libpam0g","binary_version":"1.4.0-11ubuntu2.8"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8688-1.json"}},{"package":{"name":"pam","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pam?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-5ubuntu5.7"}]}],"versions":["1.5.2-6ubuntu1","1.5.2-9.1ubuntu1","1.5.2-9.1ubuntu2","1.5.2-9.1ubuntu3","1.5.3-5ubuntu3","1.5.3-5ubuntu4","1.5.3-5ubuntu5","1.5.3-5ubuntu5.1","1.5.3-5ubuntu5.4","1.5.3-5ubuntu5.5","1.5.3-5ubuntu5.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-modules","binary_version":"1.5.3-5ubuntu5.7"},{"binary_name":"libpam-modules-bin","binary_version":"1.5.3-5ubuntu5.7"},{"binary_version":"1.5.3-5ubuntu5.7","binary_name":"libpam-runtime"},{"binary_name":"libpam0g","binary_version":"1.5.3-5ubuntu5.7"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8688-1.json"}}],"schema_version":"1.9.0"}