{"id":"UBUNTU-CVE-2019-3843","details":"It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.","modified":"2026-04-22T11:57:47.581306Z","published":"2019-04-26T21:29:00Z","related":["USN-4269-1"],"upstream":["CVE-2019-3843"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-3843"},{"type":"REPORT","url":"https://github.com/systemd/systemd-stable/pull/54"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4269-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-3843"}],"affected":[{"package":{"name":"systemd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/systemd@237-3ubuntu10.38?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"237-3ubuntu10.38"}]}],"versions":["234-2ubuntu12","235-2ubuntu3","235-3ubuntu2","235-3ubuntu3","237-3ubuntu3","237-3ubuntu4","237-3ubuntu6","237-3ubuntu7","237-3ubuntu8","237-3ubuntu10","237-3ubuntu10.2","237-3ubuntu10.3","237-3ubuntu10.4","237-3ubuntu10.6","237-3ubuntu10.9","237-3ubuntu10.11","237-3ubuntu10.12","237-3ubuntu10.13","237-3ubuntu10.15","237-3ubuntu10.17","237-3ubuntu10.19","237-3ubuntu10.20","237-3ubuntu10.21","237-3ubuntu10.22","237-3ubuntu10.23","237-3ubuntu10.24","237-3ubuntu10.25","237-3ubuntu10.26","237-3ubuntu10.28","237-3ubuntu10.29","237-3ubuntu10.31","237-3ubuntu10.33"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss-myhostname","binary_version":"237-3ubuntu10.38"},{"binary_name":"libnss-mymachines","binary_version":"237-3ubuntu10.38"},{"binary_name":"libnss-resolve","binary_version":"237-3ubuntu10.38"},{"binary_name":"libnss-systemd","binary_version":"237-3ubuntu10.38"},{"binary_name":"libpam-systemd","binary_version":"237-3ubuntu10.38"},{"binary_name":"libsystemd0","binary_version":"237-3ubuntu10.38"},{"binary_name":"libudev1","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd-container","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd-coredump","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd-journal-remote","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd-sysv","binary_version":"237-3ubuntu10.38"},{"binary_name":"systemd-tests","binary_version":"237-3ubuntu10.38"},{"binary_name":"udev","binary_version":"237-3ubuntu10.38"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3843.json"}}],"schema_version":"1.7.5","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:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}