[Snort-sigs] rule documentation for MISC xdmcp query

Josh.Sakofsky at ...1573... Josh.Sakofsky at ...1573...
Fri Jun 6 12:07:02 EDT 2003


Rule: MISC xdmcp query

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Sid: 517

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Summary: A remote user has tried to query the XDMCP service.

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Impact: Minimal

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Detailed Information: An XDMCP query can provide a wealth of information 
about a host such as a login screen, 
a list of users on the host, and to bypass access control restrictions 
used by tcpwrapper and to bypass the restriction
of login by user "root" on the box.

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Affected Systems: Any *Nix server running XDMCP.

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Attack Scenarios: An attacker can use this to find out information about 
the machine and then launch a specific attack such as
a brute force attack.

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Ease of Attack: N\A

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False Positives: None Known

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False Negatives: None Known

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Corrective Action: Disable XDMCP if not needed.

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Contributors: Original rule writer unknown.
              Josh Sakofsky
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Additional References: http://www.whitehats.com/info/IDS476
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