{"id":"CVE-2021-4091","aliases":["ALSA-2022:0889","DEBIAN-CVE-2021-4091","DLA-3399-1","DLA-4021-1","EUVD-2021-33978","GHSA-qwhp-2gp7-qhfq","MGASA-2022-0106","RHSA-2022:0628","RHSA-2022:0889","RHSA-2022:0952","RHSA-2022:1410","RLSA-2022:0889","SUSE-SU-2022:2081-1","SUSE-SU-2022:2105-1","SUSE-SU-2022:2109-1","SUSE-SU-2022:2163-1","SUSE-SU-2022:2295-1","UBUNTU-CVE-2021-4091"],"status":"published","title":"A double-free was found in the way 389-ds-base handles virtual attributes context in persistent...","description":"A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches. An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02014,"percentile":0.8103,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-415"],"published":"2022-02-18T00:00:00Z","modified":"2026-10-29T11:01:14Z","fixes":[{"ecosystem":"AlmaLinux:8","package":"389-ds-base","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"389-ds-base-devel","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"389-ds-base-legacy-tools","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"389-ds-base-libs","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"389-ds-base-snmp","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"python3-lib389","fixed_in":["1.4.3.23-14.module_el8.5.0+2628+c731dc97"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"389-ds-base","fixed_in":["2.0.15-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"389-ds-base","fixed_in":["2.0.15-1"],"sources":["osv"]},{"ecosystem":"Mageia:8","package":"389-ds-base","fixed_in":["1.4.0.26-8.2.mga8"],"sources":["osv"]},{"ecosystem":"Red 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An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.","status":"published","published":"2022-02-18T18:15:10.3Z","modified":"2026-10-23T18:03:33.898729315Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"RHSA-2022:0628","title":"Red Hat Security Advisory: 389-ds-base security and bug fix update","status":"published","published":"2024-09-16T07:02:20Z","modified":"2026-06-26T12:22:28.57483765Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2022:0889","title":"Red Hat Security Advisory: 389-ds:1.4 security and bug fix update","status":"published","published":"2024-09-16T07:02:28Z","modified":"2025-11-22T12:31:09Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2022:0952","title":"Red Hat Security Advisory: redhat-ds:11.3 security and bug fix update","status":"published","published":"2024-09-16T07:02:35Z","modified":"2026-06-27T10:14:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2022:1410","title":"Red Hat Security Advisory: 389-ds:1.4 security and bug fix update","status":"published","published":"2024-09-16T07:02:43Z","modified":"2025-11-22T12:32:24Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RLSA-2022:0889","title":"Low: 389-ds:1.4 security and bug fix update","description":"389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. \n\nSecurity Fix(es):\n\n* 389-ds-base: double free of the virtual attribute context in persistent search (CVE-2021-4091)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* Paged search lookthroughlimit counter doesnt take read ahead into account (BZ#2059893)\n\n* Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing (BZ#2060106)","status":"published","published":"2022-03-15T09:10:39Z","modified":"2026-02-04T22:45:09.853141Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"UBUNTU-CVE-2021-4091","description":"A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches. An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.","status":"published","published":"2022-02-18T18:15:00Z","modified":"2026-10-17T12:56:20.781171668Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"ALSA-2022:0889","title":"Low: 389-ds:1.4 security and bug fix update","description":"389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. \n\nSecurity Fix(es):\n\n* 389-ds-base: double free of the virtual attribute context in persistent search (CVE-2021-4091)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* Paged search lookthroughlimit counter doesnt take read ahead into account (BZ#2059893)\n\n* Based on 1944494 (RFC 4530 entryUUID attribute) - plugin entryuuid failing (BZ#2060106)","status":"published","published":"2022-03-15T09:10:39Z","modified":"2026-10-29T11:01:14.920980391Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"DLA-3399-1","title":"389-ds-base - security update","status":"published","published":"2023-04-24T00:00:00Z","modified":"2026-03-09T01:20:05.255613Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DLA-4021-1","title":"389-ds-base - security update","status":"published","published":"2025-01-19T00:00:00Z","modified":"2026-03-09T01:19:06.435503Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"MGASA-2022-0106","title":"Updated 389-ds-base packages fix security vulnerability","description":"A double-free was found in the way 389-ds-base handles virtual attributes\ncontext in persistent searches. An attacker could send a series of search\nrequests, forcing the server to behave unexpectedly, and crash.\n(CVE-2021-4091)\n","status":"published","published":"2022-03-21T20:18:30Z","modified":"2026-04-16T04:40:39.001658345Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"SUSE-SU-2022:2081-1","title":"Security update for 389-ds","description":"This update for 389-ds fixes the following issues:\n\n- CVE-2021-4091: Fixed double free in psearch (bsc#1195324).\n- CVE-2022-1949: Fixed full access control bypass with simple crafted query (bsc#1199889).\n","status":"published","published":"2022-06-14T19:04:14Z","modified":"2026-02-04T04:19:34.888487Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2105-1","title":"Security update for 389-ds","description":"This update for 389-ds fixes the following issues:\n\n- CVE-2021-4091: Fixed double free in psearch (bsc#1195324).\n- CVE-2022-1949: Fixed full access control bypass with simple crafted query (bsc#1199889).\n","status":"published","published":"2022-06-16T13:22:49Z","modified":"2026-02-04T03:35:34.355778Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2109-1","title":"Security update for 389-ds","description":"This update for 389-ds fixes the following issues:\n\t  \n- CVE-2021-3652: Fixed disabled accounts may be able to bind with crypt passwords (bsc#1188455).  \n- CVE-2022-1949: Fixed full access control bypass with simple crafted query (bsc#1199889).\n- CVE-2021-4091: Fixed double free in psearch (bsc#1195324).\n","status":"published","published":"2022-06-16T13:26:57Z","modified":"2026-02-04T04:08:48.604246Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2163-1","title":"Security update for 389-ds","description":"This update for 389-ds fixes the following issues:\n\n- CVE-2022-1949: Fixed full access control bypass with simple crafted query (bsc#1199889).\n- CVE-2022-0918: Fixed denial of service issue via crafted messages (bsc#1197275).\n- CVE-2022-0996: Fixed mishandling of password expiry (bsc#1197345).\n- CVE-2021-4091: Fixed double free in psearch (bsc#1195324).\n- CVE-2021-3652: Fixed disabled accounts may be able to bind with crypt passwords (bsc#1188455). \n","status":"published","published":"2022-06-23T12:34:06Z","modified":"2026-02-04T03:18:11.555587Z","updated_at":"2026-11-02T15:53:50.513981Z"},{"id":"SUSE-SU-2022:2295-1","title":"Security update for 389-ds","description":"This update for 389-ds fixes the following issues:\n\n- CVE-2021-4091: Fixed double free in psearch (bsc#1195324).    \n- CVE-2022-1949: Fixed full access control bypass with simple crafted query (bsc#1199889).\n","status":"published","published":"2022-07-06T11:34:50Z","modified":"2026-02-04T02:18:50.212107Z","updated_at":"2026-11-02T15:53:50.965375Z"}]}}