Description
Format string vulnerabilities in the (1) die or (2) log_event functions for ssmtp before 2.50.6 allow remote mail relays to cause a denial of service and possibly execute arbitrary 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 14 | ssmtp | 2.60.7 | — |
| Debian 13 | ssmtp | 2.60.7 | — |
| Debian 12 | ssmtp | 2.60.7 | — |
| Debian 3.0 | ssmtp | 2.50.6.1 | DSA-485 |
Advisories 1
- DSA-485 ssmtp - format string Debian Security (DSA / DLA) · Mar 9, 2026
References
- 11571 third-party-advisory
- DSA-485 vendor-advisory
- 20040507 [OpenPKG-SA-2004.020] OpenPKG Security Advisory (ssmtp) mailing-list
- 11384 third-party-advisory
- 1009788 vdb-entry
- 11378 third-party-advisory
- 5360 vdb-entry
- 5361 vdb-entry
- 10150 vdb-entry
- GLSA-200404-18 vendor-advisory
- ssmtp-die-logevent-format-string(15872) vdb-entry
- 11485 third-party-advisory