Important: dovecot security update. {"type": "TYPE_SECURITY", "shortCode": "RL", "name": "RLSA-2026:13857", "synopsis": "Important: dovecot security update", "severity": "SEVERITY_IMPORTANT", "topic": "An update is available for dovecot.\nThis update affects Rocky Linux 9.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list", "description": "Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. \n\nSecurity Fix(es):\n\n* dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command (CVE-2025-59032)\n\n* dovecot: denial of service via crafted message before authentication (CVE-2026-27858)\n\n* dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)\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.", "solution": null, "affectedProducts": ["Rocky Linux 9"], "fixes": [{"ticket": "2452172", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452172", "description": ""}, {"ticket": "2452175", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452175", "description": ""}, {"ticket": "2452179", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452179", "description": ""}], "cves": [{"name": "CVE-2025-59032", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-59032", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-229"}, {"name": "CVE-2026-27857", "sourceBy": "MITRE", "sourceLink":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27857", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-770"}, {"name": "CVE-2026-27858", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27858", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-770"}], "references": [], "publishedAt": "2026-05-07T12:03:39.445016Z", "rpms": {"Rocky Linux 9": {"nvras": ["dovecot-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-1:2.3.16-15.el9_7.1.i686.rpm", "dovecot-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-1:2.3.16-15.el9_7.1.src.rpm", "dovecot-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-debuginfo-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-debuginfo-1:2.3.16-15.el9_7.1.i686.rpm", "dovecot-debuginfo-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-debuginfo-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-debuginfo-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-debugsource-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-debugsource-1:2.3.16-15.el9_7.1.i686.rpm", "dovecot-debugsource-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-debugsource-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-debugsource-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-devel-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-devel-1:2.3.16-15.el9_7.1.i686.rpm", "dovecot-devel-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-devel-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-devel-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-mysql-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-mysql-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-mysql-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-mysql-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-mysql-debuginfo-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-mysql-debuginfo-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-mysql-debuginfo-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-mysql-debuginfo-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-pgsql-1:2.3.16-15.el9_7.1.aarch64.rpm","dovecot-pgsql-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-pgsql-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-pgsql-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-pigeonhole-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-pigeonhole-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-pigeonhole-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-pigeonhole-1:2.3.16-15.el9_7.1.x86_64.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-15.el9_7.1.aarch64.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-15.el9_7.1.ppc64le.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-15.el9_7.1.s390x.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-15.el9_7.1.x86_64.rpm"]}}, "rebootSuggested": false, "buildReferences": []}. Dovecot security update for Rocky Linux addresses important issues including denial of service vulnerabilities. Read more for details.. Dovecot Security Update, Rocky Linux Dovecot, Important Security Advisory. . Severity: Important. LinuxSecurity.com Team
Important: dovecot security update. {"type": "TYPE_SECURITY", "shortCode": "RL", "name": "RLSA-2026:13830", "synopsis": "Important: dovecot security update", "severity": "SEVERITY_IMPORTANT", "topic": "An update is available for dovecot.\nThis update affects Rocky Linux 8.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list", "description": "Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. \n\nSecurity Fix(es):\n\n* dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command (CVE-2025-59032)\n\n* dovecot: denial of service via crafted message before authentication (CVE-2026-27858)\n\n* dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)\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.", "solution": null, "affectedProducts": ["Rocky Linux 8"], "fixes": [{"ticket": "2452172", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452172", "description": ""}, {"ticket": "2452175", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452175", "description": ""}, {"ticket": "2452179", "sourceBy": "Red Hat", "sourceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=2452179", "description": ""}], "cves": [{"name": "CVE-2025-59032", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-59032", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-229"}, {"name": "CVE-2026-27857", "sourceBy": "MITRE", "sourceLink":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27857", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-770"}, {"name": "CVE-2026-27858", "sourceBy": "MITRE", "sourceLink": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-27858", "cvss3ScoringVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "cvss3BaseScore": "7.5", "cwe": "CWE-770"}], "references": [], "publishedAt": "2026-05-07T06:00:59.922786Z", "rpms": {"Rocky Linux 8": {"nvras": ["dovecot-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-1:2.3.16-7.el8_10.i686.rpm", "dovecot-1:2.3.16-7.el8_10.src.rpm", "dovecot-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-debuginfo-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-debuginfo-1:2.3.16-7.el8_10.i686.rpm", "dovecot-debuginfo-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-debugsource-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-debugsource-1:2.3.16-7.el8_10.i686.rpm", "dovecot-debugsource-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-devel-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-devel-1:2.3.16-7.el8_10.i686.rpm", "dovecot-devel-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-mysql-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-mysql-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-mysql-debuginfo-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-mysql-debuginfo-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-pgsql-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-pgsql-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-pgsql-debuginfo-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-pigeonhole-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-pigeonhole-1:2.3.16-7.el8_10.x86_64.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-7.el8_10.aarch64.rpm", "dovecot-pigeonhole-debuginfo-1:2.3.16-7.el8_10.x86_64.rpm"]}}, "rebootSuggested": false, "buildReferences": []}. Dovecot security update for Rocky Linux 8 addresses multiple denial-of-service issues, improving overall server protection.. Dovecot security update, Rocky Linux advisories, Denial of Service, IMAP server updates. . Severity: Important.LinuxSecurity.com Team
Stack-based buffer overflow has been fixed in gross, a server for greylisting emails. For Debian 10 buster, this problem has been fixed in version . - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3774-1
A vulnerability has been discovered in Dovecot that can lead to a privilege escalation when master and non-master passdbs are used.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202310-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Dovecot: Privilege Escalation Date: October 30, 2023 Bugs: #856733 ID: 202310-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A vulnerability has been discovered in Dovecot that can lead to a privilege escalation when master and non-master passdbs are used. Background ========== Dovecot is an open source IMAP and POP3 email server. Affected packages ================= Package Vulnerable Unaffected ---------------- ------------- -------------- net-mail/dovecot < 2.3.19.1-r1 > = 2.3.19.1-r1 Description =========== A vulnerability has been discovered in Dovecot. Please review the CVE identifier referenced below for details. Impact ====== When two passdb configuration entries exist in Dovecot configuration, which have the same driver and args settings, the incorrect username_filter and mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead to an unintended security configuration and can permit privilege escalation with certain configurations involving master user authentication. Dovecot documentation does not advise against the use of passdb definitions which have the same driver and args settings. One such configuration would be where an administrator wishes to use the same pam configuration or passwd file for both normal and master users but use the username_filter setting to restrict which of the users is able to be a master user. Workaround ========== There isno known workaround at this time. Resolution ========== All Dovecot users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "> =net-mail/dovecot-2.3.19.1-r1" References ========== [ 1 ] CVE-2022-30550 https://nvd.nist.gov/vuln/detail/CVE-2022-30550 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202310-19 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to
Two security issues were discovered in dovecot: IMAP and POP3 email server. CVE-2021-33515 . - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3122-1
Moderate: dovecot security update. \{'type': 'Security', 'shortCode': 'RL', 'name': 'RLSA-2022:1950', 'synopsis': 'Moderate: dovecot security update', 'severity': 'Moderate', 'topic': 'An update for dovecot is now available for Rocky Linux 8.\nRocky Linux Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.', 'description': 'Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. \nThe following packages have been upgraded to a later upstream version: dovecot (2.3.16). (BZ#1980014)\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.\nAdditional Changes:\nFor detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.', 'solution': None, 'affectedProducts': ['Rocky Linux 8'], 'fixes': ['1973610', '1974508'], 'cves': ['Red Hat:::https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-33515.json:::CVE-2021-33515'], 'references': [], 'publishedAt': '2022-05-18T19:45:00.249923Z', 'rpms': ['dovecot-2.3.16-2.el8.aarch64.rpm', 'dovecot-2.3.16-2.el8.i686.rpm', 'dovecot-2.3.16-2.el8.src.rpm', 'dovecot-2.3.16-2.el8.x86_64.rpm', 'dovecot-debuginfo-2.3.16-2.el8.aarch64.rpm', 'dovecot-debuginfo-2.3.16-2.el8.i686.rpm', 'dovecot-debuginfo-2.3.16-2.el8.x86_64.rpm', 'dovecot-debugsource-2.3.16-2.el8.aarch64.rpm', 'dovecot-debugsource-2.3.16-2.el8.i686.rpm', 'dovecot-debugsource-2.3.16-2.el8.x86_64.rpm', 'dovecot-devel-2.3.16-2.el8.aarch64.rpm', 'dovecot-devel-2.3.16-2.el8.i686.rpm','dovecot-devel-2.3.16-2.el8.x86_64.rpm', 'dovecot-mysql-2.3.16-2.el8.aarch64.rpm', 'dovecot-mysql-2.3.16-2.el8.x86_64.rpm', 'dovecot-mysql-debuginfo-2.3.16-2.el8.aarch64.rpm', 'dovecot-mysql-debuginfo-2.3.16-2.el8.x86_64.rpm', 'dovecot-pgsql-2.3.16-2.el8.aarch64.rpm', 'dovecot-pgsql-2.3.16-2.el8.x86_64.rpm', 'dovecot-pgsql-debuginfo-2.3.16-2.el8.aarch64.rpm', 'dovecot-pgsql-debuginfo-2.3.16-2.el8.x86_64.rpm', 'dovecot-pigeonhole-2.3.16-2.el8.aarch64.rpm', 'dovecot-pigeonhole-2.3.16-2.el8.x86_64.rpm', 'dovecot-pigeonhole-debuginfo-2.3.16-2.el8.aarch64.rpm', 'dovecot-pigeonhole-debuginfo-2.3.16-2.el8.x86_64.rpm']}\. Dovecot security patch released for Rocky Linux 8 to mitigate moderate risk vulnerabilities. Update now for improved security!. Rocky Linux Dovecot Security Update, Moderate Security Patch, Dovecot Email Server. . LinuxSecurity.com Team
Several security issues were fixed in Dovecot.. =========================================================================Ubuntu Security Notice USN-4993-1 June 21, 2021 dovecot vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS Summary: Several security issues were fixed in Dovecot. Software Description: - dovecot: IMAP and POP3 email server Details: Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT tokens. A local attacker could possibly use this issue to validate tokens using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. (CVE-2021-29157) Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly handled STARTTLS when using the SMTP submission service. A remote attacker could possibly use this issue to inject plaintext commands before STARTTLS negotiation. (CVE-2021-33515) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: dovecot-core 1:2.3.13+dfsg1-1ubuntu1.1 Ubuntu 20.10: dovecot-core 1:2.3.11.3+dfsg1-2ubuntu0.2 Ubuntu 20.04 LTS: dovecot-core 1:2.3.7.2-1ubuntu3.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4993-1 CVE-2021-29157, CVE-2021-33515 Package Information: https://launchpad.net/ubuntu/+source/dovecot/1:2.3.13+dfsg1-1ubuntu1.1 https://launchpad.net/ubuntu/+source/dovecot/1:2.3.11.3+dfsg1-2ubuntu0.2 https://launchpad.net/ubuntu/+source/dovecot/1:2.3.7.2-1ubuntu3.4 . Fedora has recognized a number of Postfix vulnerabilities that affect multiple versions, addressing essential mail server vulnerabilities.. Dovecot Security Fixes, Ubuntu Dovecot Advisory, Email Server Issues. .LinuxSecurity.com Team
**opensmtpd 6.8.0p2** New Features: - ECDSA privsep engine support for OpenSSL, sponsored by anonymous community member Bug fixes: - Fixed a resolver memory leak as well as a regex table memory leak - Fixed a bug in the filters state machine leading to a possible crash of the daemon - Fixed the logging format which output truncated process names on some systems - Fixed. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2021-848fd34b0b 2021-01-30 01:53:46.555441 --------------------------------------------------------------------------------Name : opensmtpd Product : Fedora 33 Version : 6.8.0p2 Release : 1.fc33 URL : https://www.opensmtpd.org/ Summary : Free implementation of the server-side SMTP protocol as defined by RFC 5321 Description : OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange e-mails with other systems speaking the SMTP protocol. Started out of dissatisfaction with other implementations, OpenSMTPD nowadays is a fairly complete SMTP implementation. OpenSMTPD is primarily developed by Gilles Chehade, Eric Faurot and Charles Longeau; with contributions from various OpenBSD hackers. OpenSMTPD is part of the OpenBSD Project. The software is freely usable and re-usable by everyone under an ISC license. This package uses standard "alternatives" mechanism, you may call "/usr/sbin/alternatives --set mta /usr/sbin/sendmail.opensmtpd" if you want to switch to OpenSMTPD MTA immediately after install, and "/usr/sbin/alternatives --set mta /usr/sbin/sendmail.sendmail" to revert back to Sendmail as a default mail daemon. --------------------------------------------------------------------------------Update Information: **opensmtpd 6.8.0p2** New Features: - ECDSA privsep engine support for OpenSSL, sponsored by anonymous community member Bug fixes: - Fixeda resolver memory leak as well as a regex table memory leak - Fixed a bug in the filters state machine leading to a possible crash of the daemon - Fixed the logging format which output truncated process names on some systems - Fixed build on macOS - Various man page improvements --------------------------------------------------------------------------------ChangeLog: * Wed Jan 20 2021 Denis Fateyev - 6.8.0p2-1 - Update to 6.8.0p2 release * Thu Sep 17 2020 Denis Fateyev - 6.7.1p1-3 - Rebuild for libevent soname change --------------------------------------------------------------------------------References: [ 1 ] Bug #1910343 - opensmtpd-6.8.0p2 is available https://bugzilla.redhat.com/show_bug.cgi?id=1910343 [ 2 ] Bug #1911290 - CVE-2020-35679 opensmtpd: memory leak via messages to an instance that performs many regex lookups due to a missing regfree call [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=1911290 [ 3 ] Bug #1911294 - CVE-2020-35680 opensmtpd: NULL pointer dereference via a crafted pattern of client activity [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=1911294 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2021-848fd34b0b' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at https://fedoraproject.org/security/ --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list --
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