{"id":"UBUNTU-CVE-2025-24031","details":"PAM-PKCS#11 is a Linux-PAM login module that allows a X.509 certificate based user login. In versions 0.6.12 and prior, the pam_pkcs11 module segfaults when a user presses ctrl-c/ctrl-d when they are asked for a PIN. When a user enters no PIN at all, `pam_get_pwd` will never initialize the password buffer pointer and as such `cleanse` will try to dereference an uninitialized pointer. On my system this pointer happens to have the value 3 most of the time when running sudo and as such it will segfault. The most likely impact to a system affected by this issue is an availability impact due to a daemon that uses PAM crashing. As of time of publication, a patch for the issue is unavailable.","modified":"2026-05-20T16:20:54.916877538Z","published":"2025-02-10T16:15:00Z","upstream":["CVE-2025-24031"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-24031"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-24031"},{"type":"REPORT","url":"https://github.com/OpenSC/pam_pkcs11/security/advisories/GHSA-wvr3-c9x3-9mff"},{"type":"REPORT","url":"https://github.com/OpenSC/pam_pkcs11/blob/bb2e3f3a95e44fdf44b0d5a4b377db3179021380/src/pam_pkcs11/pam_pkcs11.c#L211"},{"type":"REPORT","url":"https://github.com/OpenSC/pam_pkcs11/blob/bb2e3f3a95e44fdf44b0d5a4b377db3179021380/src/pam_pkcs11/pam_pkcs11.c#L797"}],"affected":[{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.8-4","0.6.8-4ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.8-4ubuntu0.1~esm1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.9-1","0.6.9-2","0.6.9-2build1","0.6.9-2build2","0.6.9-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.9-2ubuntu0.1~esm1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.11-2","0.6.11-2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.11-2ubuntu0.1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.11-4build1","0.6.11-4build2","0.6.11-4ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.11-4ubuntu0.1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.12-1","0.6.12-2","0.6.12-2build2","0.6.12-2build3","0.6.12-2ubuntu0.24.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.12-2ubuntu0.24.04.1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.13-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.13-1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}},{"package":{"name":"pam-pkcs11","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/pam-pkcs11?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.13-1","0.6.13-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.13-1build1","binary_name":"libpam-pkcs11"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-24031.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L"},{"type":"Ubuntu","score":"medium"}]}