{"id":"UBUNTU-CVE-2025-24032","details":"PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. Prior to version 0.6.13, if cert_policy is set to none (the default value), then pam_pkcs11 will only check if the user is capable of logging into the token. An attacker may create a different token with the user's public data (e.g. the user's certificate) and a PIN known to the attacker. If no signature with the private key is required, then the attacker may now login as user with that created token. The default to *not* check the private key's signature has been changed with commit commi6638576892b59a99389043c90a1e7dd4d783b921, so that all versions starting with pam_pkcs11-0.6.0 should be affected. As a workaround, in `pam_pkcs11.conf`, set at least `cert_policy = signature;`.","modified":"2026-02-04T04:25:35.410296Z","published":"2025-02-10T16:15:00Z","related":["USN-7363-1"],"upstream":["CVE-2025-24032"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-24032"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-24032"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7363-1"}],"affected":[{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11@0.6.8-4ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.8-4ubuntu0.1~esm1"}]}],"versions":["0.6.8-4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libpam-pkcs11","binary_version":"0.6.8-4ubuntu0.1~esm1"}],"priority_reason":"flaw would allow bypassing strong authentication"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24032.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11@0.6.9-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.9-2ubuntu0.1~esm1"}]}],"versions":["0.6.9-1","0.6.9-2","0.6.9-2build1","0.6.9-2build2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libpam-pkcs11","binary_version":"0.6.9-2ubuntu0.1~esm1"}],"priority_reason":"flaw would allow bypassing strong authentication"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24032.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11@0.6.11-2ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.11-2ubuntu0.1"}]}],"versions":["0.6.11-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libpam-pkcs11","binary_version":"0.6.11-2ubuntu0.1"}],"priority_reason":"flaw would allow bypassing strong authentication"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24032.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11@0.6.11-4ubuntu0.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.11-4ubuntu0.1"}]}],"versions":["0.6.11-4build1","0.6.11-4build2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libpam-pkcs11","binary_version":"0.6.11-4ubuntu0.1"}],"priority_reason":"flaw would allow bypassing strong authentication"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24032.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11@0.6.12-2ubuntu0.24.04.1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.12-2ubuntu0.24.04.1"}]}],"versions":["0.6.12-1","0.6.12-2","0.6.12-2build2","0.6.12-2build3"],"ecosystem_specific":{"priority_reason":"flaw would allow bypassing strong authentication","availability":"No subscription required","binaries":[{"binary_name":"libpam-pkcs11","binary_version":"0.6.12-2ubuntu0.24.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24032.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L"},{"type":"Ubuntu","score":"high"}]}