Rule:  

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Sid:
1792

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Summary:
This event is generated when an attempt is made to exploit a known
vulnerability in Mnews.

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Impact:
Serious. Execution of arbitrary code is possible.

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Detailed Information:
A buffer overflow condition exists in Mnews, an NNTP and mail client.
The overflow can be caused by a server sending enough data with a 200
response to overwrite stack memory and so present the attacker with the
oppotunity to execute code of their choosing.

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Affected Systems:
	FreeBSD 4.1
	FreeBSD 4.2
	FreeBSD 4.3
	FreeBSD 4.4
	FreeBSD 4.5

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Attack Scenarios:
The attacker needs to send enough extra data with the 200 response from
a server to cause the overflow.

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Ease of Attack:
Moderate.

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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 <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0909

Bugtraq:
http://www.securityfocus.com/bid/4900

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