A vulnerability has been reported in MailMarshal SMTP, which can be exploited by malicious users to conduct script insertion attacks.

Input passed via unspecified parameters in the "list of blocked senders" and "list of safe senders" functionality of the Spam Quarantine Management (SQM) component is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is viewed.

Successful exploitation requires valid user credentials.

NOTE: Reportedly, this vulnerability can further be exploited to install arbitrary files on a victim's system.

The vulnerability is reported in versions 6.0 through 6.3.

Solution
Update to version 6.4 or later.

Provided and/or discovered by
Dr. Marian Ventuneac, Data Communication Security Laboratory, University of Limerick

Original Advisory
MailMarshal:
http://www.marshal.com/kb/article.aspx?id=12175

Dr. Marian Ventuneac:
http://www.dcsl.ul.ie/marshal.htm

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