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UDP_xdmcp info query
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Code:
p519
Severity: Warning
Description: This event is generated when a remote user attempts to query the X Display Manager Control Protocol (XDMCP).
Impact:
Reconnaissance. An attacker may obtain a list of usernames on the remote host.
Corrective: Block inbound XDMCP traffic.
Disable XDMCP as a listening service on the remote host unless it is required.
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