[SA18874] @Mail Webmail Image Tag Script Insertion Vulnerability

TITLE:
@Mail Webmail Image Tag Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA18874

VERIFY ADVISORY:
http://secunia.com/advisories/18874/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
@Mail 4.x
http://secunia.com/product/5459/

DESCRIPTION:
Thomas Pollet has discovered a vulnerability in @Mail, which can be
exploited by malicious people to conduct script insertion attacks.

The vulnerability is cause due to missing sanitisation of email
messages that contain HTML image tags with "javascript:" URLs that
has " " in the middle. This can be exploited to execute arbitrary
JavaScript code in the context of the user's session.

Example:
<img src="java script:[code]">

Successful exploitation requires that the user views images in an
email message.

The vulnerability has been confirmed in version 4.3. Other versions
may also be affected.

SOLUTION:
Filter potential malicious email messages with an email filtering
gateway.

PROVIDED AND/OR DISCOVERED BY:
Thomas Pollet

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