{"id":"USN-3816-2","summary":"systemd vulnerability","details":"USN-3816-1 fixed several vulnerabilities in systemd. However, the fix for\nCVE-2018-6954 was not sufficient. This update provides the remaining fixes.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Jann Horn discovered that unit_deserialize incorrectly handled status messages\n above a certain length. A local attacker could potentially exploit this via\n NotifyAccess to inject arbitrary state across re-execution and obtain root\n privileges. (CVE-2018-15686)\n \n Jann Horn discovered a race condition in chown_one(). A local attacker\n could potentially exploit this by setting arbitrary permissions on certain\n files to obtain root privileges. This issue only affected Ubuntu 18.04 LTS\n and Ubuntu 18.10. (CVE-2018-15687)\n \n It was discovered that systemd-tmpfiles mishandled symlinks in\n non-terminal path components. A local attacker could potentially exploit\n this by gaining ownership of certain files to obtain root privileges. This\n issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-6954)\n","modified":"2026-04-22T09:51:41.627684Z","published":"2018-11-19T22:03:24Z","related":["UBUNTU-CVE-2018-6954"],"upstream":["CVE-2018-6954","UBUNTU-CVE-2018-6954"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3816-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-6954"}],"affected":[{"package":{"name":"systemd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/systemd@229-4ubuntu21.9?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"229-4ubuntu21.9"}]}],"versions":["225-1ubuntu9","227-2ubuntu1","227-2ubuntu2","228-1ubuntu2","228-2ubuntu1","228-2ubuntu2","228-3ubuntu1","228-4ubuntu1","228-4ubuntu2","228-5ubuntu1","228-5ubuntu2","228-5ubuntu3","228-6ubuntu1","229-1ubuntu2","229-1ubuntu4","229-2ubuntu1","229-3ubuntu1","229-3ubuntu2","229-4ubuntu1","229-4ubuntu4","229-4ubuntu5","229-4ubuntu6","229-4ubuntu7","229-4ubuntu8","229-4ubuntu10","229-4ubuntu11","229-4ubuntu12","229-4ubuntu13","229-4ubuntu16","229-4ubuntu17","229-4ubuntu19","229-4ubuntu20","229-4ubuntu21","229-4ubuntu21.1","229-4ubuntu21.2","229-4ubuntu21.3","229-4ubuntu21.4","229-4ubuntu21.5","229-4ubuntu21.6","229-4ubuntu21.8"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss-myhostname","binary_version":"229-4ubuntu21.9"},{"binary_name":"libnss-mymachines","binary_version":"229-4ubuntu21.9"},{"binary_name":"libnss-resolve","binary_version":"229-4ubuntu21.9"},{"binary_name":"libpam-systemd","binary_version":"229-4ubuntu21.9"},{"binary_name":"libsystemd0","binary_version":"229-4ubuntu21.9"},{"binary_name":"libudev1","binary_version":"229-4ubuntu21.9"},{"binary_name":"systemd","binary_version":"229-4ubuntu21.9"},{"binary_name":"systemd-container","binary_version":"229-4ubuntu21.9"},{"binary_name":"systemd-coredump","binary_version":"229-4ubuntu21.9"},{"binary_name":"systemd-journal-remote","binary_version":"229-4ubuntu21.9"},{"binary_name":"systemd-sysv","binary_version":"229-4ubuntu21.9"},{"binary_name":"udev","binary_version":"229-4ubuntu21.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3816-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"systemd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/systemd@237-3ubuntu10.9?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"237-3ubuntu10.9"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnss-myhostname","binary_version":"237-3ubuntu10.9"},{"binary_name":"libnss-mymachines","binary_version":"237-3ubuntu10.9"},{"binary_name":"libnss-resolve","binary_version":"237-3ubuntu10.9"},{"binary_name":"libnss-systemd","binary_version":"237-3ubuntu10.9"},{"binary_name":"libpam-systemd","binary_version":"237-3ubuntu10.9"},{"binary_name":"libsystemd0","binary_version":"237-3ubuntu10.9"},{"binary_name":"libudev1","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd-container","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd-coredump","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd-journal-remote","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd-sysv","binary_version":"237-3ubuntu10.9"},{"binary_name":"systemd-tests","binary_version":"237-3ubuntu10.9"},{"binary_name":"udev","binary_version":"237-3ubuntu10.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3816-2.json","cves_map":{"cves":[{"severity":[{"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":"CVSS_V3"},{"score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2018-6954"}],"ecosystem":"Ubuntu:18.04:LTS"}}}],"schema_version":"1.7.5"}