Rule:

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Sid:
307

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Summary:
This event is generated when an attempt is made to exploit 
vulnerable versions of the Chocoa IRC client.

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Impact:
Serious. System compromize presenting the attacker with the opportunity to execute arbitrary code on the client.

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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.

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

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

Exploit scripts are available

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Ease of Attack:
Simple. Exploits are available.

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
Upgrade to the latest non-affected version of the software.

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Contributors:
Sourcefire Research Team
Brian Caswell <brian.caswell@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0672

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