Squirrelmail: Another XSS vulnerability

Background

SquirrelMail is a webmail package written in PHP. It supports IMAP and SMTP, and can optionally be installed with SQL support.

Description

A new cross-site scripting (XSS) vulnerability in Squirrelmail-1.4.3_rc1 has been discovered. In functions/mime.php Squirrelmail fails to properly sanitize user input.

Impact

By enticing a user to read a specially crafted e-mail, an attacker can execute arbitrary scripts running in the context of the victim’s browser. This could lead to a compromise of the user’s webmail account, cookie theft, etc.

Workaround

There is no known workaround at this time.

Resolution

All SquirrelMail users should upgrade to the latest stable version:

 # emerge sync
 
 # emerge -pv ">=mail-client/squirrelmail-1.4.3"
 # emerge ">=mail-client/squirrelmail-1.4.3"