{"id":"USN-6425-2","aliases":[],"status":"published","title":"samba regression","description":"USN-6425-1 fixed vulnerabilities in Samba. Due to a build issue on Ubuntu\n20.04 LTS, the update introduced regressions in macro handling and\npossibly other functionality.\n\nThis update fixes the problem. We apologize for the inconvenience.\n\nOriginal advisory details:\n\n Sri Nagasubramanian discovered that the Samba acl_xattr VFS module\n incorrectly handled read-only files. When Samba is configured to ignore\n system ACLs, a remote attacker could possibly use this issue to truncate\n read-only files. (CVE-2023-4091)\n \n Andrew Bartlett discovered that Samba incorrectly handled the DirSync\n control. A remote attacker with an RODC DC account could possibly use this\n issue to obtain all domain secrets. (CVE-2023-4154)\n \n Andrew Bartlett discovered that Samba incorrectly handled the rpcecho\n development server. A remote attacker could possibly use this issue to\n cause Samba to stop responding, resulting in a denial of service.\n (CVE-2023-42669)\n \n Kirin van der Veer discovered that Samba incorrectly handled certain RPC\n service listeners. A remote attacker could possibly use this issue to cause\n Samba to start multiple incompatible RPC listeners, resulting in a denial\n of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.\n (CVE-2023-42670)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-10-11T20:11:55Z","modified":"2026-04-22T10:40:34Z","fixes":[{"ecosystem":"Ubuntu:20.04:LTS","package":"samba","fixed_in":["2:4.15.13+dfsg-0ubuntu0.20.04.7"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.15.13+dfsg-0ubuntu0.20.04.7"}]}],"versions":["2:4.10.7+dfsg-0ubuntu2","2:4.10.7+dfsg-0ubuntu3","2:4.11.1+dfsg-3ubuntu1","2:4.11.1+dfsg-3ubuntu2","2:4.11.1+dfsg-3ubuntu4","2:4.11.5+dfsg-1ubuntu1","2:4.11.5+dfsg-1ubuntu2","2:4.11.6+dfsg-0ubuntu1","2:4.11.6+dfsg-0ubuntu1.1","2:4.11.6+dfsg-0ubuntu1.2","2:4.11.6+dfsg-0ubuntu1.3","2:4.11.6+dfsg-0ubuntu1.4","2:4.11.6+dfsg-0ubuntu1.5","2:4.11.6+dfsg-0ubuntu1.6","2:4.11.6+dfsg-0ubuntu1.8","2:4.11.6+dfsg-0ubuntu1.9","2:4.11.6+dfsg-0ubuntu1.10","2:4.13.14+dfsg-0ubuntu0.20.04.1","2:4.13.14+dfsg-0ubuntu0.20.04.2","2:4.13.14+dfsg-0ubuntu0.20.04.3","2:4.13.14+dfsg-0ubuntu0.20.04.4","2:4.13.17~dfsg-0ubuntu0.21.04.1","2:4.13.17~dfsg-0ubuntu0.21.04.2","2:4.13.17~dfsg-0ubuntu1.20.04.1","2:4.13.17~dfsg-0ubuntu1.20.04.2","2:4.13.17~dfsg-0ubuntu1.20.04.4","2:4.13.17~dfsg-0ubuntu1.20.04.5","2:4.15.13+dfsg-0ubuntu0.20.04.1","2:4.15.13+dfsg-0ubuntu0.20.04.2","2:4.15.13+dfsg-0ubuntu0.20.04.3","2:4.15.13+dfsg-0ubuntu0.20.04.4","2:4.15.13+dfsg-0ubuntu0.20.04.5","2:4.15.13+dfsg-0ubuntu0.20.04.6"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-6425-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2039031","tags":["report"]}],"sources":{"osv":[{"id":"USN-6425-2","title":"samba regression","description":"USN-6425-1 fixed vulnerabilities in Samba. Due to a build issue on Ubuntu\n20.04 LTS, the update introduced regressions in macro handling and\npossibly other functionality.\n\nThis update fixes the problem. We apologize for the inconvenience.\n\nOriginal advisory details:\n\n Sri Nagasubramanian discovered that the Samba acl_xattr VFS module\n incorrectly handled read-only files. When Samba is configured to ignore\n system ACLs, a remote attacker could possibly use this issue to truncate\n read-only files. (CVE-2023-4091)\n \n Andrew Bartlett discovered that Samba incorrectly handled the DirSync\n control. A remote attacker with an RODC DC account could possibly use this\n issue to obtain all domain secrets. (CVE-2023-4154)\n \n Andrew Bartlett discovered that Samba incorrectly handled the rpcecho\n development server. A remote attacker could possibly use this issue to\n cause Samba to stop responding, resulting in a denial of service.\n (CVE-2023-42669)\n \n Kirin van der Veer discovered that Samba incorrectly handled certain RPC\n service listeners. A remote attacker could possibly use this issue to cause\n Samba to start multiple incompatible RPC listeners, resulting in a denial\n of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.\n (CVE-2023-42670)\n","status":"published","published":"2023-10-11T20:11:55Z","modified":"2026-04-22T10:40:34.023967Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}