Description
Dovecot 1.1 before 2.2.13 and dovecot-ee before 2.1.7.7 and 2.2.x before 2.2.12.12 does not properly close old connections, which allows remote attackers to cause a denial of service (resource consumption) via an incomplete SSL/TLS handshake for an IMAP/POP3 connection.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dovecot | 1:2.2.13~rc1-1 | — |
| Debian 13 | dovecot | 1:2.2.13~rc1-1 | — |
| Debian 12 | dovecot | 1:2.2.13~rc1-1 | — |
| Debian 7 | dovecot | 1:2.1.7-7+deb7u1 | DSA-2954-1 |
| Debian 6.0 | dovecot | 1:1.2.15-7+deb6u1 | DLA-0004-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | dovecot | 1:2.2.9-1ubuntu2.1 | USN-2213-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | dovecot +3 | 1:2.2.10-4.el7_0.1 | RHSA-2014:0790 |
| RHEL 6 | dovecot +4 | 1:2.0.9-7.el6_5.1 | RHSA-2014:0790 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dovecot22 | 2.2.27-1.1 | openSUSE-SU-2024:10158-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dovecot +3 | 1:2.2.10-4.el7_0.1 | ELSA-2014-0790 |
| Oracle Linux 7 | dovecot-devel | 1:2.0.9-7.el6_5.1 | ELSA-2014-0790 |
Advisories 6
- RHSA-2014:0790 Red Hat Security Advisory: dovecot security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2213-1 dovecot vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-2954-1 dovecot - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-0004-1 dovecot - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10158-1 dovecot22-2.2.27-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2014-0790 Moderate: dovecot security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 25, 2014
References
- [oss-security] 20140509 CVE request: Denial of Service attacks against Dovecot v1.1+ mailing-list
- 59051 third-party-advisory
- [oss-security] 20140509 Re: CVE request: Denial of Service attacks against Dovecot v1.1+ mailing-list
- 59537 third-party-advisory
- http://advisories.mageia.org/MGASA-2014-0223.html
- [dovecot] 20140508 Denial of Service attacks against Dovecot v1.1+ mailing-list
- DSA-2954 vendor-advisory
- 59552 third-party-advisory
- USN-2213-1 vendor-advisory
- 67306 vdb-entry
- MDVSA-2015:113 vendor-advisory
- RHSA-2014:0790 vendor-advisory
- http://linux.oracle.com/errata/ELSA-2014-0790.html
- [Dovecot-news] 20140511 v2.2.13 released mailing-list