Description
Stack-based buffer overflow in the split_wildmats function in nntpd.c in nntpd in Cyrus IMAP Server before 2.3.17 and 2.4.x before 2.4.11 allows remote attackers to execute arbitrary code via a crafted NNTP command.
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 6.0 | cyrus-imapd-2.2 | 2.2.13-19+squeeze2 | DSA-2318-1 |
| Debian 5.0 | cyrus-imapd-2.2 | 2.2.13-14+lenny5 | DSA-2318-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | cyrus-imapd +2 | 2.3.16-6.el6_1.3 | RHSA-2011:1317 |
| RHEL 5 | cyrus-imapd +3 | 2.3.7-12.el5_7.1 | RHSA-2011:1317 |
| RHEL 4 | perl-Cyrus +5 | 2.2.12-16.el4 | RHSA-2011:1317 |
Advisories 2
- RHSA-2011:1317 Red Hat Security Advisory: cyrus-imapd security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2318-1 cyrus-imapd-2.2 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- SUSE-SU-2011:1034 vendor-advisory
- 46064 third-party-advisory
- http://git.cyrusimap.org/cyrus-imapd/commit/?id=3244c18c928fa331f6927e2b8146abe90feafddd
- 49534 vdb-entry
- 75307 vdb-entry
- openSUSE-SU-2011:1036 vendor-advisory
- [cyrus-announce] 20110908 Cyrus 2.4.11 Released mailing-list
- 45975 third-party-advisory
- cyrus-splitwildmats-bo(69679) vdb-entry
- [cyrus-announce] 20110908 Cyrus 2.3.17 Released mailing-list
- RHSA-2011:1317 vendor-advisory
- 45938 third-party-advisory
- MDVSA-2011:149 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=734926
- DSA-2318 vendor-advisory
- http://git.cyrusimap.org/cyrus-imapd/commit/?id=0f8f026699829b65733c3081657b24e2174f4f4d
- 1026031 vdb-entry