Some vulnerabilities have been discovered in Xitami, which can be exploited by malicious people to compromise a vulnerable system.

1) A boundary error exists in the processing HTTP requests. This can be exploited to cause a stack-based buffer overflow by sending a specially crafted HTTP request containing an overly long "If-Modified-Since" header.

Successful exploitation allows execution of arbitrary code.

2) A format string error exists in the processing of requested SSI URLs. This can be exploited via a specially crafted HTTP request to port 80/TCP by default.

3) A format string error exists in the processing of LRWP (Long Running Web Process) requests. This can be exploited via a specially crafted request sent to port 81/TCP by default.

Successful exploitation of the vulnerabilities may allow execution of arbitrary code.

The vulnerabilities are confirmed in version 2.5c2. Other versions may also be affected.

Solution
Restrict access to the web server.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Krystian Kloskowski
2, 3) bratax

Changelog
Further details available to Secunia VIM customers

Original Advisory
1) http://milw0rm.com/exploits/4450
2, 3) http://www.bratax.be/advisories/b013.html

Deep Links
Links available to Secunia VIM customers