{"id":"UBUNTU-CVE-2020-27743","details":"libtac in pam_tacplus through 1.5.1 lacks a check for a failure of RAND_bytes()/RAND_pseudo_bytes(). This could lead to use of a non-random/predictable session_id.","modified":"2025-10-24T04:48:51Z","published":"2020-10-26T22:15:00Z","upstream":["CVE-2020-27743"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-27743"},{"type":"REPORT","url":"https://github.com/kravietz/pam_tacplus/pull/163"},{"type":"REPORT","url":"https://tools.ietf.org/html/rfc8907"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-27743"}],"affected":[{"package":{"name":"libpam-tacplus","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libpam-tacplus@1.3.8-2+deb8u1build0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8-2","1.3.8-2+deb8u1build0.16.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-tacplus","binary_version":"1.3.8-2+deb8u1build0.16.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-27743.json"}},{"package":{"name":"libpam-tacplus","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libpam-tacplus@1.3.8-2+deb8u1build0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8-2","1.3.8-2+deb8u1build0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-tacplus","binary_version":"1.3.8-2+deb8u1build0.18.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-27743.json"}},{"package":{"name":"libpam-tacplus","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libpam-tacplus@1.3.8-2+deb8u1build0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8-2","1.3.8-2+deb8u1build0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-tacplus","binary_version":"1.3.8-2+deb8u1build0.20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-27743.json"}},{"package":{"name":"libpam-tacplus","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libpam-tacplus@1.3.8-2.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpam-tacplus","binary_version":"1.3.8-2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-27743.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}