Description
Integer overflow in imapparse.c for Cyrus IMAP server 1.4 and 2.1.10 allows remote attackers to execute arbitrary code via a large length value that facilitates a buffer overflow attack, a different vulnerability than CVE-2002-1347.
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 | 1.5.19-9.10 | — |
| Debian 13 | cyrus-imapd | 1.5.19-9.10 | — |
| Debian 12 | cyrus-imapd | 1.5.19-9.10 | — |
| Debian 3.0 | cyrus-imapd | 1.5.19-9.1 | DSA-215 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Cyrus IMAPD 1.4/1.5.19/2.0.12/2.0.16/2.1.9/2.1.10 - Pre-Login Heap Corruption EDB-22061 · dos · Dec 2, 2002 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-215 cyrus-imapd - buffer overflow Debian Security (DSA / DLA) · Mar 9, 2026
References
- 000557 vendor-advisory
- CLA-2002:557 vendor-advisory
- DSA-215 vendor-advisory
- http://asg.web.cmu.edu/cyrus/download/imapd/changes.html
- VU#740169 third-party-advisory
- 6298 vdb-entry
- cyrus-imap-preauth-bo(10744) vdb-entry
- 20021202 pre-login buffer overflow in Cyrus IMAP server mailing-list