For those of you that are unfortunate enough to have to run this software there is something you should know this morning. It’s vulnerable to two attacks.
1) Input passed via the URL when attempting to access blocked web sites (as defined by the MIMEsweeper policy) isn’t properly sanitised before being returned to the user via an error page. This can be exploited to execute arbitrary HTML and script code in a user’s browser session in context of an arbitrary blocked web site.Example:
http://[blocked web site]/[code]2) An error in the scanning functionality can be exploited to crash the Web Policy Engine service via a specially crafted, encrypted RAR archive.
Switching to a solution that doesn’t suck would be better than patching.
Tags: MIMEsweeper, Clearswift, Email Filtering, Email antivirus, Vulnerabilities
