CVE-2022-20817: cisco cisco ip phones with multiplatform firmware

Vulnerability summary

CVE-2022-20817 is a high (CVSS 7.4) vulnerability in cisco cisco ip phones with multiplatform firmware. EPSS estimates a 1.21% chance of exploitation in the next 30 days, higher than 68% of scored vulnerabilities.

Timeline

1. 15-06-2022
   PublishedVulnerability first disclosed.
2. 01-11-2024
   Last modifiedVulnerability information updated.

Description

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. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.

• CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.