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Cisco VoIP Phone Stream Request Denial Of Service Vulnerability
The 7900 series VoIP Phones are a Voice-Over-IP solution distributed by Cisco Systems. It is possible to deny service to users of this line of phones. By placing a request to the /StreamingStatistics script with a stream ID (i.e. http://www.example.com/StreamingStatistics?<stream> where <stream> is an integer value) of arbitrarily high value, the phone will reset itself, creating the inability to place or receive calls for a period of up to thirty seconds. This has been reportedly reproduced by passing stream ID values of greater than 32768, and consistently reproduced with a value of 120000. |
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