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

Announced

2010-09-06

Revised

2010-09-06

Access

local

Bugs

#308043

Advisory

https://security.gentoo.org/glsa/201009-02

Affected packages

Package	Arch	Vulnerable	Unaffected
mail-filter/maildrop	*	< 2.4.2	>= 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

• CVE-2010-0301