File: 1987.txt

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Rule:

--
Sid:
1987

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Summary:
This event is generated when an attempt is made to exploit a flaw in the
X Windows Font Service.

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Impact:
Arbitrary code execution. Denial of Service.

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Detailed Information:
Certain versions of XFS distributed with Sun's Solaris are vulnerable to
a remote buffer overflow. The Dispatch() routine within fs.auto does not
provide adequate bounds-checking.

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Affected Systems:
	Sun Solaris 2.5.1 to 9 (Update 2)

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Attack Scenarios:
An attacker must have access to tcp port 7100. The attacker can then 
either cause XFS to crash or run code as user "nobody".

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Ease of Attack:
Difficult

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False Positives:
None Known

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False Negatives:
None Known

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Corrective Action:
Disable XFS in the inetd configuration file (normally /etc/inetd.conf 
under line fs.auto).

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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Josh Sakofsky

-- 
Additional References:

Nessus:
http://cgi.nessus.org/plugins/dump.php3?id=11188

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1317

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