Rule:

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Sid:
286

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Summary:
This event is generated when an attempt is made to exploit a buffer 
overflow in the POP3 qpopper service on BSD systems.

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Impact:
An attacker can gain access to a shell running with root privileges.

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Detailed Information:
This rule looks for a piece of shell code (executable code) that is
used to exploit a known vulnerability in an older version of the Qualcom
based POP3 daemon distributed with BSD Unixes.

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Affected Systems:
*BSD systems using Qualcomm Qpopper 2.4

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Attack Scenarios:
The attack is done remotely and gives the attacker a command shell
running with root privileges.

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Ease of Attack:
Simple.  An exploit is readily available.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Install the available security patches from your vendor.

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Contributors:
Original Rule Writer Unknown
Sourcefire Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Steven Alexander<alexander.s@mccd.edu>

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Additional References:

Bugtraq:
http://www.securityfocus.com/bid/133

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-1999-0006

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