GLSA-200809-09 : Postfix: Denial of Service
Low Nessus Plugin ID 34248
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200809-09 (Postfix: Denial of Service)
It has been discovered than Postfix leaks an epoll file descriptor when executing external commands, e.g. user-controlled $HOME/.forward or $HOME/.procmailrc files. NOTE: This vulnerability only concerns Postfix instances running on Linux 2.6 kernels.
A local attacker could exploit this vulnerability to reduce the performance of Postfix, and possibly trigger an assertion, resulting in a Denial of Service.
Allow only trusted users to control delivery to non-Postfix commands.
SolutionAll Postfix 2.4 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=mail-mta/postfix-2.4.9' All Postfix 2.5 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=mail-mta/postfix-2.5.5'