Some vulnerabilities have been reported Zeus Web Server, which can be exploited by malicious people to manipulate certain data, conduct spoofing attacks, conduct cross-site scripting attacks, cause a DoS (Denial of Service), or potentially compromise a vulnerable system.

1) The vulnerability is caused due to an error in the processing of SSLv2 packets and can be exploited to cause a buffer overflow.

2) An error in the TLS protocol while handling session re-negotiations can be exploited to insert arbitrary plaintext before data sent by a legitimate client in an existing TLS session via Man-in-the-Middle (MitM) attacks.

3) The application does not use unpredictable transaction IDs for DNS requests, which can be exploited to spoof DNS responses.

4) Certain unspecified input is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Successful exploitation requires that the admin server is configured to use SSL.

Note: Additionally, this fixes a crash when handling connections that have aborted early.

The vulnerabilities are reported in versions prior to 4.3r5.

Solution
Update to version 4.3r5.
Further details available in Customer Area

Provided and/or discovered by
1) Reportedly a module for VulnDisco Pack.
2-4) Reported by the vendor.

Changelog
Further details available in Customer Area

Original Advisory
Zeus:
http://support.zeus.com/zws/news/2010/01/13/zws_4_3r5_released
http://support.zeus.com/zws/media/docs/4.3/RELEASE_NOTES

Intevydis:
http://intevydis.com/vd-list.shtml
http://intevydis.blogspot.com/2010/01/zeus-web-server-ssl2clienthello.html

Deep Links
Links available in Customer Area