Postfix: Denial of service

Postfix: Denial of service A memory leak in Postfix might allow local users to cause a Denial of Service. postfix 2008-09-19 2008-09-19 236453 local 2.4.9 2.5.5 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"

CVE-2008-3889 keytoaster p-y p-y