GEN:SID 1:307
Message EXPLOIT CHAT IRC topic overflow
Summary This event is generated when an attempt is made to exploit
vulnerable versions of the Chocoa IRC client.
Impact Serious. System compromize presenting the attacker with the opportunity to execute arbitrary code on the client.
Detailed Information It is possible for a malicious attacker to exploit a vulnerability in the Chocoa IRC client by setting an IRC channel topic specially designed to cause a buffer overflow.

Affected Systems:
    Fujitsu Chocoa 1.0 beta 7r for Windows 9x and NT.

Affected Systems  
Attack Scenarios The attacker would need to set a specially crafted IRC channel topic to cause the overflow.

Exploit scripts are available
Ease of Attack Simple. Exploits are available.
Corrective Action Upgrade to the latest non-affected version of the software.
Additional References CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0672

Bugtraq:
http://www.securityfocus.com/bid/573
Rule References bugtraq: 573
cve: 1999-0672