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Cisco Bug: CSCvv48060 - CUBE accepts SDP with invalid port number

Last Modified

Oct 07, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

15.5(3)S5.37

Description (partial)

Symptom:
Due to some unspecified reason, provider send INVITE with SDP with malformed port number (eg. 111014), where the port value should has max. 65535 (16-bit integer) as per RFC:
https://tools.ietf.org/html/rfc6056#page-5

CUBE instead of rejecting such call, is only discarding values over 16-bits, which ends up with calls merging, one way audio and call quality issues causing disruption to the production environment.

Conditions:
Invalid port (over 65535) present in SDP from provider
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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