Description
imap/nntpd.c in the NNTP server (nntpd) for Cyrus IMAPd 2.4.x before 2.4.12 allows remote attackers to bypass authentication by sending an AUTHINFO USER command without sending an additional AUTHINFO PASS 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_1.4 | RHSA-2011:1508 |
| RHEL 5 | cyrus-imapd +3 | 2.3.7-12.el5_7.2 | RHSA-2011:1508 |
| RHEL 4 | perl-Cyrus +5 | 2.2.12-17.el4 | RHSA-2011:1508 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cyrus-imapd | 2.4.18-3.4 | openSUSE-SU-2024:10015-1 |
Advisories 3
- RHSA-2011:1508 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
- openSUSE-SU-2024:10015-1 cyradm-2.4.18-3.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- http://cyrusimap.org/mediawiki/index.php/Latest_Updates
- https://bugzilla.redhat.com/show_bug.cgi?id=740822
- RHSA-2011:1508 vendor-advisory
- MDVSA-2011:149 vendor-advisory
- 46093 third-party-advisory
- http://git.cyrusimap.org/cyrus-imapd/commit/?id=77903669e04c9788460561dd0560b9c916519594
- 1026363 vdb-entry
- http://secunia.com/secunia_research/2011-68
- DSA-2318 vendor-advisory