A memory leak in Postfix might allow local users to cause a Denial of Service.
Package | mail-mta/postfix on all architectures |
---|---|
Affected versions | < 2.4.9 < 2.5.5 |
Unaffected versions | >= 2.4.9 >= 2.5.5 |
Postfix is Wietse Venema's mailer that attempts to be fast, easy to administer, and secure, as an alternative to the widely-used Sendmail program.
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.
All 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"
Release date
September 19, 2008
Latest revision
September 19, 2008: 01
Severity
normal
Exploitable
local
Bugzilla entries