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Cisco Bug: CSCvt39059 - CUBE doesn't update the crypto keys during session refresh in SRTP crypto interworking

Last Modified

Oct 06, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.9.4

Description (partial)

Symptom:
Its an SRTP call flow and cube does the interworking of crypto between AES256 and SHA1_32 . During session refresh , SDP version got incremented by service provide in reinvite for refresh but the SDP parameters have not changed actually in the Invite. Due to which CUBE did rekeying of crypto on both the legs but it didnt update the FPI layer about the new keys.

Conditions:
SRTP-SRTP call flow with crypto suite interworking.
Reinvite for sessiion refresh SDP version incremented but no change in SDP
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