TITLE:
Open-Xchange Webmail HTML Attachment Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA18285

VERIFY ADVISORY:
http://secunia.com/advisories/18285/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Open-Xchange 0.x
http://secunia.com/product/6735/

DESCRIPTION:
Thomas Pollet has reported a vulnerability in Open-Xchange, which can
be exploited by malicious people to conduct script insertion attacks.

The vulnerability is caused due to missing sanitisation of HTML
attachments before displaying them to the user in the Webmail. This
can be exploited to execute arbitrary script code in a user's browser
session in context of an affected website when a malicious email is
viewed.

Successful exploitation requires that inlining of HTML attachments is
enabled.

The vulnerability has been reported in version 0.8.1-6 and prior.
Other versions may also be affected.

SOLUTION:
Disable inlining of HTML attachments in the Webmail options to
prevent malicious HTML attachments from being automatically displayed
when the email is viewed.

PROVIDED AND/OR DISCOVERED BY:
Thomas Pollet

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