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Cisco Bug: CSCvu43707 - CUBE sends incomplete SDP on Refer transfer with replaces

Last Modified

Sep 11, 2020

Products (67)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco ASR 1000 Series IOS XE SD-WAN
  • Cisco Catalyst 9300-48P-A Switch
  • Cisco Catalyst 9800-40 Wireless Controller
  • Cisco Catalyst 9300-48T-A Switch
  • Cisco Catalyst 9300-48UXM-A Switch
  • Cisco Catalyst C9500-16X-E Switch
  • Cisco Catalyst 9300-48U-A Switch
  • Cisco Catalyst 9400 Supervisor Engine-1XL-Y
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Known Affected Releases

16.12.3 16.9.5

Description (partial)

Audio failure due to incomplete SDP.

CUBE receives an REFER message with Refer-to host as domain and replaces header parameter. In this case, cube performs a DNS lookup against Refer-to host and if lookup fails, it matches the DP and triggers an incomplete SDP (with no m line)
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