{"id":"USN-3976-3","aliases":[],"status":"published","title":"samba regression","description":"USN-3976-1 fixed a vulnerability in Samba. The update introduced a\nregression causing Samba to occasionally crash. This update fixes the\nproblem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked\n S4U2Self packets. In certain environments, a remote attacker could possibly\n use this issue to escalate privileges.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2019-05-27T11:39:45Z","modified":"2026-04-22T09:55:37Z","fixes":[{"ecosystem":"Ubuntu:16.04:LTS","package":"samba","fixed_in":["2:4.3.11+dfsg-0ubuntu0.16.04.21"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"samba","fixed_in":["2:4.7.6+dfsg~ubuntu-0ubuntu2.11"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.3.11+dfsg-0ubuntu0.16.04.21"}]}],"versions":["2:4.1.17+dfsg-4ubuntu2","2:4.1.20+dfsg-1ubuntu1","2:4.1.20+dfsg-1ubuntu2","2:4.1.20+dfsg-1ubuntu3","2:4.1.20+dfsg-1ubuntu5","2:4.3.3+dfsg-1ubuntu1","2:4.3.3+dfsg-1ubuntu2","2:4.3.3+dfsg-1ubuntu3","2:4.3.6+dfsg-1ubuntu1","2:4.3.8+dfsg-0ubuntu1","2:4.3.9+dfsg-0ubuntu0.16.04.1","2:4.3.9+dfsg-0ubuntu0.16.04.2","2:4.3.9+dfsg-0ubuntu0.16.04.3","2:4.3.11+dfsg-0ubuntu0.16.04.1","2:4.3.11+dfsg-0ubuntu0.16.04.3","2:4.3.11+dfsg-0ubuntu0.16.04.5","2:4.3.11+dfsg-0ubuntu0.16.04.6","2:4.3.11+dfsg-0ubuntu0.16.04.7","2:4.3.11+dfsg-0ubuntu0.16.04.8","2:4.3.11+dfsg-0ubuntu0.16.04.9","2:4.3.11+dfsg-0ubuntu0.16.04.10","2:4.3.11+dfsg-0ubuntu0.16.04.11","2:4.3.11+dfsg-0ubuntu0.16.04.12","2:4.3.11+dfsg-0ubuntu0.16.04.13","2:4.3.11+dfsg-0ubuntu0.16.04.15","2:4.3.11+dfsg-0ubuntu0.16.04.16","2:4.3.11+dfsg-0ubuntu0.16.04.17","2:4.3.11+dfsg-0ubuntu0.16.04.18","2:4.3.11+dfsg-0ubuntu0.16.04.19","2:4.3.11+dfsg-0ubuntu0.16.04.20"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.7.6+dfsg~ubuntu-0ubuntu2.11"}]}],"versions":["2:4.6.7+dfsg-1ubuntu3","2:4.7.1+dfsg-1ubuntu1","2:4.7.3+dfsg-1ubuntu1","2:4.7.4+dfsg-1ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu2","2:4.7.6+dfsg~ubuntu-0ubuntu2.2","2:4.7.6+dfsg~ubuntu-0ubuntu2.4","2:4.7.6+dfsg~ubuntu-0ubuntu2.5","2:4.7.6+dfsg~ubuntu-0ubuntu2.6","2:4.7.6+dfsg~ubuntu-0ubuntu2.7","2:4.7.6+dfsg~ubuntu-0ubuntu2.9","2:4.7.6+dfsg~ubuntu-0ubuntu2.10"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-3976-3","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1827924","tags":["report"]}],"sources":{"osv":[{"id":"USN-3976-3","title":"samba regression","description":"USN-3976-1 fixed a vulnerability in Samba. The update introduced a\nregression causing Samba to occasionally crash. This update fixes the\nproblem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked\n S4U2Self packets. In certain environments, a remote attacker could possibly\n use this issue to escalate privileges.\n","status":"published","published":"2019-05-27T11:39:45Z","modified":"2026-04-22T09:55:37.958721Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}