Dovecot: Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2024-1867 · first 16.08.2024 · updated 17.09.2026 · CVSS 7,5
What it is about
Dovecot ist ein Open Source IMAP und POP3 E-Mail Server. Ein entfernter Angreifer kann mehrere Schwachstellen in Dovecot ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- Debian Linux
- Amazon Linux 2
- Red Hat Enterprise Linux
- Fedora Linux
- Ubuntu Linux
- SUSE Linux
- Oracle Linux
- SUSE openSUSE
- RESF Rocky Linux
- Open Source Dovecot IMAP Server <2.3.21.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Dovecot IMAP Server 2.3.21.1
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- OSS Security Mailing List vom 2024-08-15 www.openwall.com
- OSS Security Mailing List vom 2024-08-15 www.openwall.com
- Fedora Security Advisory FEDORA-2024-BA5BB9F63A vom 2024-08-19 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2024-E23E8A3F1E vom 2024-08-19 bodhi.fedoraproject.org
- Debian Security Advisory DSA-5752 vom 2024-08-21 lists.debian.org
- Ubuntu Security Notice USN-6982-1 vom 2024-09-02 ubuntu.com
- Debian Security Advisory DLA-3860 vom 2024-09-02 lists.debian.org
- SUSE Security Update SUSE-SU-2024:3118-1 vom 2024-09-03 lists.suse.com
- Red Hat Security Advisory RHSA-2024:6465 vom 2024-09-09 access.redhat.com
- Red Hat Security Advisory RHSA-2024:6529 vom 2024-09-10 access.redhat.com
- Oracle Linux Security Advisory ELSA-2024-6529 vom 2024-09-10 linux.oracle.com
- Ubuntu Security Notice USN-7013-1 vom 2024-09-16 ubuntu.com
- Rocky Linux Security Advisory RLSA-2024:6529 vom 2024-09-17 errata.build.resf.org
- Red Hat Security Advisory RHSA-2024:6973 vom 2024-09-24 access.redhat.com
- Oracle Linux Security Advisory ELSA-2024-6973 vom 2024-09-25 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2024:6973 vom 2024-09-30 errata.build.resf.org
- Amazon Linux Security Advisory ALAS-2024-2719 vom 2024-12-20 alas.aws.amazon.com
- openSUSE Security Update OPENSUSE-SU-2025:14715-1 vom 2025-01-31 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:4139-1 vom 2026-09-16 lists.suse.com
CVE: CVE-2024-23184, CVE-2024-23185
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.