Maildrop: privilege escalation — GLSA 201009-02

Insecure permission handling in maildrop might allow local attackers to elevate their privileges.

Affected Packages

mail-filter/maildrop on all architectures
Affected versions < 2.4.2
Unaffected versions >= 2.4.2

Background

maildrop is the mail filter/mail delivery agent that is used by the Courier Mail Server.

Description

Christoph Anton Mitterer reported that maildrop does not properly drop its privileges when run as root.

Impact

A local attacker could create a specially crafted .mailfilter file, possibly leading to the execution of arbitrary commands with the "root" group privileges. NOTE: Successful exploitation requires that maildrop is run as root with the -d option.

Workaround

There is no known workaround at this time.

Resolution

All maildrop users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-filter/maildrop-2.4.2"

References

Release Date
September 06, 2010

Latest Revision
September 06, 2010: 01

Severity
high

Exploitable
local

Bugzilla entries