CVE-2020-27121: cisco cisco unified communications manager im and presence service Uncaught Exception

Vulnerability summary

CVE-2020-27121 is a medium (CVSS 6.5) Uncaught Exception vulnerability in cisco cisco unified communications manager im and presence service. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 66.7% of scored vulnerabilities.

Timeline

1. 06-11-2020
   PublishedVulnerability first disclosed.
2. 13-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.

• CWE-248Uncaught ExceptionAn exception is thrown from a function, but it is not caught.
• CWE-755Improper Handling of Exceptional ConditionsThe product does not handle or incorrectly handles an exceptional condition.