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Hat Security Advisory: dovecot security update","status":"published","published":"2024-09-16T04:45:38Z","modified":"2026-06-26T12:22:15.569171294Z","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":"2026-11-02T15:53:07.57369Z"},{"id":"UBUNTU-CVE-2020-12100","description":"In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.","status":"published","published":"2020-08-12T12:00:00Z","modified":"2026-04-22T12:27:20.215145Z","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":"2026-11-02T15:54:22.804634Z"},{"id":"CLSA-2021-1634573745","title":"Fix of CVE: CVE-2020-25275, CVE-2020-12100","description":"- CVE-2020-12100: Resource exhaustion via deeply nested MIME parts\n- CVE-2020-25275: Denial of service via mail MIME parsing","status":"published","published":"2021-10-18T16:15:45Z","modified":"2026-10-21T10:47:41.667640234Z","updated_at":"2026-11-02T15:43:39.801198Z"},{"id":"CLSA-2021-1634922570","title":"Fixed CVEs in dovecot: CVE-2020-25275, CVE-2020-12100","description":"- CVE-2020-12100: Resource exhaustion via deeply nested MIME parts\n- CVE-2020-25275: Denial of service via mail MIME parsing","status":"published","published":"2021-10-22T17:09:30Z","modified":"2026-10-21T10:46:44.706697871Z","updated_at":"2026-11-02T15:43:39.801198Z"},{"id":"DLA-2328-1","title":"dovecot - security update","status":"published","published":"2020-08-15T00:00:00Z","modified":"2026-03-09T01:22:15.717861Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DSA-4745-1","title":"dovecot - security update","status":"published","published":"2020-08-12T00:00:00Z","modified":"2026-03-09T02:11:35.973682Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2020-0330","title":"Updated dovecot packages fix security vulnerability","description":"CVE-2020-12100: Receiving mail with deeply nested MIME parts leads to resource\nexhaustion as Dovecot attempts to parse it.\nCVE-2020-12673: Dovecot's NTLM implementation does not correctly check message\nbuffer size, which leads to reading past allocation which can lead to crash.\nCVE-2020-12674: Dovecot's RPA mechanism implementation accepts zero-length\nmessage, which leads to assert-crash later on.\n","status":"published","published":"2020-08-18T17:41:27Z","modified":"2026-04-16T04:44:24.455513488Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2021:0026-1","title":"Security update for dovecot23","description":"This update for dovecot23 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920).\n- CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405).\n- CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).\n\nNon-security issues fixed:\n\n- Pigeonhole was updated to version 0.5.11.\n- Dovecot was updated to version 2.3.11.3.\n\nThis update was imported from the SUSE:SLE-15-SP1:Update update project.","status":"published","published":"2021-01-07T15:52:33Z","modified":"2026-02-04T02:15:34.355449Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2021:0072-1","title":"Security update for dovecot23","description":"This update for dovecot23 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920).\n- CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405).\n- CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).\n\nNon-security issues fixed:\n\n- Pigeonhole was updated to version 0.5.11.\n- Dovecot was updated to version 2.3.11.3.\n\nThis update was imported from the SUSE:SLE-15-SP1:Update update project.","status":"published","published":"2021-01-16T10:05:36Z","modified":"2025-05-07T18:11:21.104351Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:10726-1","title":"dovecot23-2.3.16-1.6 on GA media","description":"These are all security issues fixed in the dovecot23-2.3.16-1.6 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:09:35.541917Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"openSUSE-SU-2025:14715-1","title":"dovecot24-2.4.0-1.1 on GA media","description":"These are all security issues fixed in the dovecot24-2.4.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-01-30T00:00:00Z","modified":"2026-02-04T03:33:59.818366Z","updated_at":"2026-11-02T16:58:36.976155Z"},{"id":"SUSE-SU-2021:0027-1","title":"Security update for dovecot23","description":"This update for dovecot23 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920).\n- CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405).\n- CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).\n\nNon-security issues fixed:\n\n- Pigeonhole was updated to version 0.5.11.\n- Dovecot was updated to version 2.3.11.3.\n","status":"published","published":"2021-01-05T14:57:36Z","modified":"2026-02-04T03:51:55.132727Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0028-1","title":"Security update for dovecot23","description":"This update for dovecot23 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920).\n- CVE-2020-12673: Fixed an improper implementation of NTLM that did not check the message buffer size (bsc#1174922).\n- CVE-2020-12674: Fixed an improper implementation of the RPA mechanism (bsc#1174923).\n- CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405).\n- CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).\n\nNon-security issues fixed:\n\n- Pigeonhole was updated to version 0.5.11.\n- Dovecot was updated to version 2.3.11.3.\n","status":"published","published":"2021-01-05T14:57:48Z","modified":"2026-02-04T03:42:29.96382Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:0029-1","title":"Security update for dovecot23","description":"This update for dovecot23 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-12100: Fixed a resource exhaustion caused by deeply nested MIME parts (bsc#1174920).\n- CVE-2020-24386: Fixed an issue with IMAP hibernation that allowed users to access other users' emails (bsc#1180405).\n- CVE-2020-25275: Fixed a crash when the 10000th MIME part was message/rfc822 (bsc#1180406).\n\nNon-security issues fixed:\n\n- Pigeonhole was updated to version 0.5.11.\n- Dovecot was updated to version 2.3.11.3.\n","status":"published","published":"2021-01-05T14:58:15Z","modified":"2026-02-04T02:37:15.356621Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"USN-4456-1","title":"dovecot vulnerabilities","description":"It was discovered that Dovecot incorrectly handled deeply nested MIME\nparts. A remote attacker could possibly use this issue to cause Dovecot to\nconsume resources, resulting in a denial of service. (CVE-2020-12100)\n\nIt was discovered that Dovecot incorrectly handled memory when using NTLM.\nA remote attacker could possibly use this issue to cause Dovecot to crash,\nresulting in a denial of service. (CVE-2020-12673)\n\nIt was discovered that the Dovecot RPA mechanism incorrectly handled\nzero-length messages. A remote attacker could possibly use this issue to\ncause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)\n","status":"published","published":"2020-08-12T13:42:30Z","modified":"2026-04-22T10:07:09.379006Z","updated_at":"2026-11-02T16:58:14.547547Z"},{"id":"USN-4456-2","title":"dovecot vulnerabilities","description":"USN-4456-1 fixed several vulnerabilities in Dovecot. This update provides\nthe corresponding update for Ubuntu 14.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that Dovecot incorrectly handled deeply nested MIME\n parts. A remote attacker could possibly use this issue to cause Dovecot to\n consume resources, resulting in a denial of service. (CVE-2020-12100)\n\n It was discovered that Dovecot incorrectly handled memory when using NTLM.\n A remote attacker could possibly use this issue to cause Dovecot to crash,\n resulting in a denial of service. (CVE-2020-12673)\n\n It was discovered that the Dovecot RPA mechanism incorrectly handled\n zero-length messages. A remote attacker could possibly use this issue to\n cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)\n","status":"published","published":"2020-08-17T12:32:32Z","modified":"2026-04-22T10:07:21.142714Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}