Rule:

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Sid:
289

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Summary:
This event is generated when a remote attacker attempts to exploit a 
QUALCOMM Qpopper POP3 buffer overflow vulnerability in SCO OpenServer 
systems.

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Impact:
Remote execution of arbitrary code leading to remote root compromise.

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Detailed Information:
An exploit is available that takes advantage of a buffer overflow 
vulnerability in QUALCOMM Qpopper POP3 mail server version 2.53 or 
earlier. This exploit can be used to obtain root access to the 
compromised server.

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Affected Systems:
SCO servers that ship QUALCOMM Qpopper POP3 server version 2.53 or 
earlier:
 -SCO OpenServer Enterprise System Release 5.0.5, 5.0.6, 5.0.6a
 -SCO OpenServer Host System Release 5.0.5, 5.0.6, 5.0.6a
 -SCO OpenServer Desktop System Release 5.0.5, 5.0.6, 5.0.6a
 -SCO OpenServer Enterprise System Release 5.0.4
 -SCO OpenServer Host System Release 5.0.4
 -SCO OpenServer Desktop System Release 5.0.4

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Attack Scenarios:
An attacker executes exploit code against a vulnerable server and 
obtains root privileges on the compromised computer.

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Ease of Attack:
Simple. An exploit exists.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Upgrade QUALCOMM Qpopper. See ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.8/ for patched binaries for SCO OpenServer and an advisory with installation instructions.

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Contributors:
Original rule writer unknown
Sourcefire Research Team
Sourcefire Technical Publications Team
Jen Harvey <jennifer.harvey@sourcefire.com>

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Additional References:

CERT
http://www.cert.org/advisories/CA-1998-08.html

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