Description
Postfix 2.4 before 2.4.9, 2.5 before 2.5.5, and 2.6 before 2.6-20080902, when used with the Linux 2.6 kernel, leaks epoll file descriptors during execution of "non-Postfix" commands, which allows local users to cause a denial of service (application slowdown or exit) via a crafted command, as demonstrated by a command in a .forward file.
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 | postfix | 2.5.5-1 | — |
| Debian 13 | postfix | 2.5.5-1 | — |
| Debian 12 | postfix | 2.5.5-1 | — |
References
- 31986 third-party-advisory
- FEDORA-2008-8595 vendor-advisory
- 32231 third-party-advisory
- 20080916 [Suspected Spam][CVE-2008-4042] Postfix Linux-only local denial of service - PoC mailing-list
- 31982 third-party-advisory
- USN-642-1 vendor-advisory
- 30977 vdb-entry
- FEDORA-2008-8593 vendor-advisory
- 31800 third-party-advisory
- postfix-filedescriptor-dos(44865) vdb-entry
- 4239 third-party-advisory
- SUSE-SR:2008:018 vendor-advisory
- GLSA-200809-09 vendor-advisory
- http://www.wekk.net/research/CVE-2008-3889/
- 31716 third-party-advisory
- 6472 exploit
- MDVSA-2008:190 vendor-advisory
- 1020800 vdb-entry
- http://www.postfix.org/announcements/20080902.html
- 20081104 rPSA-2008-0311-1 postfix mailing-list
- 20080902 Postfix Linux-only local denial of service mailing-list
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0311