{"id":"USN-4705-1","summary":"sudo vulnerabilities","details":"It was discovered that Sudo incorrectly handled memory when parsing command\nlines. A local attacker could possibly use this issue to obtain unintended\naccess to the administrator account. (CVE-2021-3156)\n\nIt was discovered that the Sudo sudoedit utility incorrectly handled\nchecking directory permissions. A local attacker could possibly use this\nissue to bypass file permissions and determine if a directory exists or\nnot.  (CVE-2021-23239)\n","modified":"2026-04-27T16:03:35.496549186Z","published":"2021-01-26T18:48:16Z","related":["UBUNTU-CVE-2021-23239","UBUNTU-CVE-2021-3156"],"upstream":["CVE-2021-23239","CVE-2021-3156","UBUNTU-CVE-2021-23239","UBUNTU-CVE-2021-3156"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4705-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3156"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23239"}],"affected":[{"package":{"name":"sudo","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/sudo@1.8.16-0ubuntu1.10?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.16-0ubuntu1.10"}]}],"versions":["1.8.12-1ubuntu3","1.8.16-0ubuntu1","1.8.16-0ubuntu1.1","1.8.16-0ubuntu1.2","1.8.16-0ubuntu1.3","1.8.16-0ubuntu1.4","1.8.16-0ubuntu1.5","1.8.16-0ubuntu1.6","1.8.16-0ubuntu1.7","1.8.16-0ubuntu1.8","1.8.16-0ubuntu1.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"sudo","binary_version":"1.8.16-0ubuntu1.10"},{"binary_name":"sudo-ldap","binary_version":"1.8.16-0ubuntu1.10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4705-1.json","cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2021-3156"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-23239"}]}}},{"package":{"name":"sudo","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/sudo@1.8.21p2-3ubuntu1.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.21p2-3ubuntu1.4"}]}],"versions":["1.8.20p2-1ubuntu1","1.8.21p2-2ubuntu1","1.8.21p2-3ubuntu1","1.8.21p2-3ubuntu1.1","1.8.21p2-3ubuntu1.2","1.8.21p2-3ubuntu1.3"],"ecosystem_specific":{"binaries":[{"binary_name":"sudo","binary_version":"1.8.21p2-3ubuntu1.4"},{"binary_name":"sudo-ldap","binary_version":"1.8.21p2-3ubuntu1.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4705-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2021-3156"},{"id":"CVE-2021-23239","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}]}}},{"package":{"name":"sudo","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/sudo@1.8.31-1ubuntu1.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.31-1ubuntu1.2"}]}],"versions":["1.8.27-1ubuntu4","1.8.29-1ubuntu1","1.8.31-1ubuntu1","1.8.31-1ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"sudo","binary_version":"1.8.31-1ubuntu1.2"},{"binary_name":"sudo-ldap","binary_version":"1.8.31-1ubuntu1.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4705-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2021-3156"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-23239"}]}}}],"schema_version":"1.7.5"}