Description
fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.
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 | fetchmail | 6.3.6-1 | — |
| Debian 13 | fetchmail | 6.3.6-1 | — |
| Debian 12 | fetchmail | 6.3.6-1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | fetchmail | 6.4.21-2.1 | openSUSE-SU-2024:10753-1 |
Advisories 1
- openSUSE-SU-2024:10753-1 fetchmail-6.4.21-2.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- 1017479 vdb-entry
- SSA:2007-024-01 vendor-advisory
- http://fetchmail.berlios.de/fetchmail-SA-2006-03.txt
- 23838 third-party-advisory
- 24151 third-party-advisory
- 20070105 fetchmail security announcement 2006-03 (CVE-2006-5974) mailing-list
- 23631 third-party-advisory
- 23804 third-party-advisory
- ADV-2007-0088 vdb-entry
- SUSE-SR:2007:004 vendor-advisory
- FEDORA-2007-041 vendor-advisory
- 23923 third-party-advisory
- 31836 vdb-entry
- OpenPKG-SA-2007.004 vendor-advisory
- 2007-0007 vendor-advisory
- GLSA-200701-13 vendor-advisory
- ADV-2007-0087 vdb-entry
- 21902 vdb-entry