[Snort-sigs] False positive for 2461

Matthew Jonkman matt at ...2436...
Thu Jul 1 11:37:06 EDT 2004

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CHAT Yahoo IM webcam watch
False positive. Audio chat messages incoming set this off. Remedying 
this may be as simple as renaming the rule to "CHAT Yahoo IM webcam or 
audio watch"
Audio messages are being deemed webcam connections.
Detailed Information:
A user that was participating in a text chat session that had audio 
messages being sent was triggering this rule.
Affected Systems:

Attack Scenarios:

Ease of Attack:

False Positives:
Audio chat traffic will also trigger this rule.
False Negatives:

Corrective Action:
Rename rule, or look further into the protocol and see if traffic 
between these two operations is unique.

Additional References:
Matthew Jonkman, CISSP
Senior Security Engineer
765-429-0398 Direct Anytime
765-448-6847 Office
866-679-5177 24x7 NOC

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