CVE-2021-1478 Cisco Unified Communications Manager Denial of Service Vulnerability

Medium 5.3 Published 6 May 2021 Updated 8 Nov 2024

An authenticated remote attacker can cause a denial of service by accessing an unsecured JMX port in Cisco Unified Communications Manager.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-1478?

CVE-2021-1478 is a medium-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 6 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Java Management Extensions (JMX) component of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to an unsecured TCP/IP port. An attacker could exploit this vulnerability by accessing the port and restarting the JMX process. A successful exploit could allow the attacker to cause a DoS condition on an affected system.

Weakness: CWE-284

Which versions are affected by CVE-2021-1478?

It affects 2 products.

Products include Cisco Hosted Collaboration Mediation Fulfillment, Cisco Unified Communications Manager.

How do I fix CVE-2021-1478?

No fix has been published for CVE-2021-1478 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-1478 being exploited?

There is no known exploitation of CVE-2021-1478 in the wild and no public exploit code.

All Cisco Unified Communications Manager vulnerabilities

Sources

Also known as GHSA-5248-64jc-4p36.