MIME-tools: Virus detection evasion

Background

MIME-tools is a Perl module containing functions to handle MIME attachments.

Description

MIME-tools doesn’t correctly parse attachment boundaries with an empty name (boundary=“”).

Impact

An attacker could send a carefully crafted email and evade detection on some email virus-scanning programs using MIME-tools for attachment decoding.

Workaround

There is no known workaround at this time.

Resolution

All MIME-tools users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-perl/MIME-tools-5.415"