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Cisco Bug: CSCvi05326 - Multi channel CAL broken by MS OS security patch KB4056895

Last Modified

Mar 26, 2018

Products (1)

  • Cisco AS Series Media Processor Software

Known Affected Releases

9.5.2 9.6.5 9.7.6

Description (partial)

On multi channel CAL machines, only one Encoding Service is accessible. All other encoding channels are not available via encadmin GUI or XML API. GUI Summary page shows Encode Channels with status "Disabled." Application log likely filled with:

Exception communicating with Encoding Service 2
Error HRESULT E_FAIL has been returned from a call to a COM component.
   at EncodingService.CInletEncoderClass.GetEncodingSession(Int32 SessionIndex)
   at EncoderFactory.GetEncodingSession(Int32 channel) in c:\inetpub\wwwroot\encadmin\App_Code\EncoderFactory.cs:line 52
   at alarmState.getChannelAlarms(CEncodingSession session, Int32 channelIndex) in c:\inetpub\wwwroot\encadmin\data\alarmState.ashx:line 137

KB4056895 breaks the COM interfaces that CAL uses for interprocess communication. Therefore the Encoding Services are running on the system, but not accessible to the rest of the software components.
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