vulnerability
Red Hat: CVE-2024-23184: dovecot: using a large number of address headers may trigger a denial of service (Multiple Advisories)
Severity | CVSS | Published | Added | Modified |
---|---|---|---|---|
7 | (AV:N/AC:L/Au:S/C:N/I:N/A:C) | Aug 15, 2024 | Sep 10, 2024 | Jun 3, 2025 |
Severity
7
CVSS
(AV:N/AC:L/Au:S/C:N/I:N/A:C)
Published
Aug 15, 2024
Added
Sep 10, 2024
Modified
Jun 3, 2025
Description
Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.
Solution(s)
redhat-upgrade-dovecotredhat-upgrade-dovecot-debuginforedhat-upgrade-dovecot-debugsourceredhat-upgrade-dovecot-develredhat-upgrade-dovecot-mysqlredhat-upgrade-dovecot-mysql-debuginforedhat-upgrade-dovecot-pgsqlredhat-upgrade-dovecot-pgsql-debuginforedhat-upgrade-dovecot-pigeonholeredhat-upgrade-dovecot-pigeonhole-debuginfo

NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.