| GEN:SID | 1:2451 |
| Message | CHAT Yahoo IM voicechat |
| Summary | This event is generated when a user in your network has successfully registered with a Yahoo Instant Messenger server to receive voice chat messages or is receiving voice chat messages.
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| Impact | Possible policy violation. Instant Messenger programs may not be appropriate in certain network environments.
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| Detailed Information | Yahoo IM voice chat allows IM users to exchange audio messages. This activity may not be appropriate in a corporate environment.
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| Affected Systems | Any host running Yahoo Instant Messenger.
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| Attack Scenarios | This particular type of Yahoo IM exchange has no known attacks, however it may represent a policy violation because the host is running Yahoo IM.
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| Ease of Attack | Easy to exchange voice messages.
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| Corrective Action | Disallow the use of IM clients on the protected network and enforce or implement an organization wide policy on the use of IM clients.
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| Additional References | Yahoo Protocol http://www.cse.iitb.ac.in/~varunk/YahooProtocol.htm
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