Rule:  

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Sid:
2263

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

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Impact:
Remote arbitrary code execution.

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Detailed Information:
A vulnerability exists in the prescan() function used in Sendmail prior
to version 8.12.9. This function contains an error when converting a
character to an integer value while processing SMTP headers.

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Affected Systems:
All systems using Sendmail.

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Attack Scenarios:
An attacker could exploit this condition to process code of their
choosing and open a listening shell bound to a high port, thus opening the
system to further compromise.

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Ease of Attack:
Simple. Exploit code exists.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Upgrade Sendmail to the latest non-affected verison.

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

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Additional References:

CERT:
http://www.cert.org/advisories/CA-2003-07.html

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