The Grandstream SIP Phone GXV-3000 with firmware 220.127.116.11, Loader 18.104.22.168, and Boot 22.214.171.124 allows remote attackers to force silent call completion, eavesdrop on the phone's local environment, and cause a denial of service (blocked call reception) via a certain SIP INVITE message followed by a certain "SIP/2.0 183 Session Progress" message.
CVSS Severity (version 2.0):
Impact Subscore: 7.8
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows disruption of service
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20070822 Remote eavesdropping with SIP Phone GXV-3000