Description
The argument parser of the PARTIAL command in Cyrus IMAP Server 2.2.6 and earlier allows remote authenticated users to execute arbitrary code via a certain command ("body[p") that is treated as a different command ("body.peek") and causes an index increment error that leads to an out-of-bounds memory corruption.
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 | cyrus-imapd | 1.5.19-20 | — |
| Debian 13 | cyrus-imapd | 1.5.19-20 | — |
| Debian 12 | cyrus-imapd | 1.5.19-20 | — |
| Debian 3.0 | cyrus21-imapd | 1.5.19-9.2 | DSA-597-1 |
Advisories 1
- DSA-597-1 cyrus-imapd - buffer overflow Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-597 vendor-advisory
- cyrus-imap-commands-execute-code(18199) vdb-entry
- http://security.e-matters.de/advisories/152004.html
- http://asg.web.cmu.edu/cyrus/download/imapd/changes.html
- MDKSA-2004:139 vendor-advisory
- 20041122 Advisory 15/2004: Cyrus IMAP Server multiple remote vulnerabilities mailing-list
- [cyrus-announce] 20041122 Cyrus IMAPd 2.2.9 Released mailing-list
- 13274 third-party-advisory
- GLSA-200411-34 vendor-advisory
- USN-31-1 vendor-advisory