Description
smtp.c in the c-client library in University of Washington IMAP Toolkit 2007b allows remote SMTP servers to cause a denial of service (NULL pointer dereference and application crash) by responding to the QUIT command with a close of the TCP connection instead of the expected 221 response code.
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 12 | uw-imap | 7:2007d~dfsg-1 | — |
| Debian 5.0 | uw-imap | 2007b~dfsg-4+lenny1 | DTSA-174-2, DTSA-174-1 |
| Debian 4.0 | uw-imap | 7:2002edebian1-13.1+etch1 | DSA-1685-1 |
Advisories 3
- DSA-1685-1 uw-imap - multiple vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DTSA-174-2 uw-imap - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DTSA-174-1 uw-imap - buffer overflow Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20081103 Re: CVE request - uw-imap mailing-list
- DSA-1685 vendor-advisory
- imap-toolkit-smtp-dos(46604) vdb-entry
- 32280 vdb-entry
- 33142 third-party-advisory
- MDVSA-2009:146 vendor-advisory