Two vulnerabilities have been discovered in Serv-U, which can be exploited by malicious people to compromise a vulnerable system.

1) A boundary error in the web administration interface when parsing session cookies can be exploited to cause a stack-based buffer overflow by sending an HTTP request containing a specially crafted cookie to the server.

Successful exploitation allows execution of arbitrary code.

2) A boundary error exists in a function when decoding a hexadecimal representation of a string using the TEA decoding algorithm. This can be exploited to cause a stack-based buffer overflow by passing an overly long string.

Successful exploitation may allow execution of arbitrary code.

The vulnerabilities are confirmed in version 9.0.0.5. Other versions may also be affected.

Solution
Update to version 9.1.0.0.

Provided and/or discovered by
1) Nikolaos Rangos, KC Security.
2) Secunia Research

Changelog
Further details available to Secunia VIM customers

Original Advisory
Nikolaos Rangos:
http://www.rangos.de/ServU-ADV.txt

Secunia Research:
http://secunia.com/secunia_research/2009-46/

Deep Links
Links available to Secunia VIM customers