{"id":"CVE-2018-10918","aliases":["ALPINE-CVE-2018-10918","DEBIAN-CVE-2018-10918","EUVD-2018-2972","GHSA-3gcv-q5vm-qrxr","SUSE-SU-2018:2318-1","UBUNTU-CVE-2018-10918","USN-3738-1","openSUSE-SU-2024:11365-1"],"status":"published","title":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB...","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","severity":{"version":"3.0","score":5.2,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.02514,"percentile":0.84907,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2018-08-14T00:00:00Z","modified":"2026-10-24T10:30:36Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.7","package":"samba","fixed_in":["4.7.6-r1"],"sources":["osv"]},{"ecosystem":"Alpine:v3.8","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"samba","fixed_in":["4.8.4-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"samba","fixed_in":["2:4.8.4+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"samba","fixed_in":["2:4.8.4+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"samba","fixed_in":["2:4.8.4+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"samba","fixed_in":["2:4.7.6+dfsg~ubuntu-0ubuntu2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.10","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.11","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.7","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.7.6-r1"}]}]},{"source":"osv","ecosystem":"Alpine:v3.8","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.9","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.7.0"},{"fixed":"4.8.4-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.8.4+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.8.4+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"samba","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.8.4+dfsg-1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux 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Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-22T17:00:00Z","modified":"2024-08-05T07:54:35Z","cvss":[{"version":"3.0","score":5.2,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T02:39:57.009215Z"}],"ghsa":[{"id":"GHSA-3gcv-q5vm-qrxr","title":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB...","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2022-05-13T01:34:54Z","modified":"2023-02-01T05:08:26Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:50:46.174982Z"}],"nvd":[{"id":"CVE-2018-10918","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-22T17:29:00.477Z","modified":"2026-06-17T01:34:55.217Z","cvss":[{"version":"3.0","score":5.2,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:04:36.842579Z"}],"osv":[{"id":"ALPINE-CVE-2018-10918","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-22T17:29:00.477Z","modified":"2026-10-23T17:17:55.2015517Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:27:47.187336Z"},{"id":"CVE-2018-10918","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-22T17:29:00.477Z","modified":"2026-10-24T10:30:36.224977868Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:07.641418Z"},{"id":"DEBIAN-CVE-2018-10918","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-22T17:29:00.477Z","modified":"2026-10-23T18:03:35.66536829Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:29.988046Z"},{"id":"UBUNTU-CVE-2018-10918","description":"A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.","status":"published","published":"2018-08-14T00:00:00Z","modified":"2026-04-22T11:41:02.893404Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.0","score":5.2,"vector":"CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"openSUSE-SU-2024:11365-1","title":"ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media","description":"These are all security issues fixed in the ctdb-4.14.6+git.182.2205d5224e3-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:12:49.07167Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"SUSE-SU-2018:2318-1","title":"Security update for samba","description":"This update for samba fixes the following issues:\n\nThe following security vulnerabilities were fixed:\n\n- CVE-2018-1139: Disable NTLMv1 auth if smb.conf doesn't allow it; (bsc#1095048)\n- CVE-2018-1140: ldbsearch '(distinguishedName=abc)' and DNS query with escapes crashes; (bsc#1095056)\n- CVE-2018-10919: Confidential attribute disclosure via substring search; (bsc#1095057)\n- CVE-2018-10858: smbc_urlencode helper function is a subject to buffer overflow; (bsc#1103411)\n- CVE-2018-10918: Fix NULL ptr dereference in DsCrackNames on a user without a SPN; (bsc#1103414)\n\n","status":"published","published":"2018-08-14T09:53:11Z","modified":"2026-02-04T04:08:21.035288Z","updated_at":"2026-11-02T15:53:44.972817Z"},{"id":"USN-3738-1","title":"samba vulnerabilities","description":"Svyatoslav Phirsov discovered that the Samba libsmbclient library\nincorrectly handled extra long filenames. A malicious server could use this\nissue to cause Samba to crash, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2018-10858)\n\nVolker Mauel discovered that Samba incorrectly handled database output.\nWhen used as an Active Directory Domain Controller, a remote authenticated\nattacker could use this issue to cause Samba to crash, resulting in a\ndenial of service. This issue only affected Ubuntu 18.04 LTS.\n(CVE-2018-10918)\n\nPhillip Kuhrt discovered that the Samba LDAP server incorrectly handled\ncertain confidential attribute values. A remote authenticated attacker\ncould possibly use this issue to obtain certain sensitive information.\n(CVE-2018-10919)\n\nVivek Das discovered that Samba incorrectly handled NTLMv1 being explicitly\ndisabled on the server. A remote user could possibly be authenticated using\nNTLMv1, contrary to expectations. This issue only affected Ubuntu 18.04\nLTS. (CVE-2018-1139)\n","status":"published","published":"2018-08-14T17:02:50Z","modified":"2026-04-22T09:47:47.922312Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}