CVE-2022-20817 – Cisco IP Phone Duplicate Key Vulnerability

https://notcve.org/view.php?id=CVE-2022-20817

15 Jun 2022 — A vulnerability in Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM... • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cp6901-dup-cert-82jdJGe4 • CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) •