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Kerio MailServer Buffer Overflows and Cross Site Scripting
Secunia Advisory: SA9077
Release Date: 2003-06-19
Popularity: 5,850 views

Critical:
Highly critical
Impact: Cross Site Scripting
DoS
System access
Where: From remote
Solution Status: Unpatched

Software:Kerio MailServer 5.x

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Description:
Multiple vulnerabilities have been identified in Kerio MailServer allowing malicious people to hi-jack accounts and gain system access.

The web mail in Kerio is vulnerable to basic Cross Site Scripting in the following scripts:
/add_acl?folder=~conde0@localhost/INBOX&add_name=<malicious_script>
/do_map?action=new&oldalias=eso&alias=<malicious_script>

Multiple buffer overflows have been identified in the handling of the "showuser", "folder", and "user" parameters. This can possibly allow execution of arbitrary code, but may only be exploited by authenticated users.

Version 5.6.3 has been reported to be vulnerable.

Solution:
Use a firewall or proxy server with URL filtering capabilities to filter malicious requests.

Provided and/or discovered by:
David F. Madrid

Original Advisory:
http://nautopia.org/vulnerabilidades/kerio_mailserver.htm


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