CVE-2023-20116 Denial of service in Cisco Unified Communications Manager

Medium 6.8 Published 28 Jun 2023 Updated 2 Aug 2024

An authenticated remote attacker can cause a denial of service on Cisco Unified Communications Manager by sending crafted HTTP input to the Self Care Portal.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-20116?

CVE-2023-20116 is a medium-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 28 Jun 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability in the Administrative XML Web Service (AXL) API 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 device. This vulnerability is due to insufficient validation of user-supplied input to the web UI of the Self Care Portal. An attacker could exploit this vulnerability by sending crafted HTTP input to an affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.

Weakness: CWE-835

Which versions are affected by CVE-2023-20116?

It affects 1 product.

Products include Cisco Unified Communications Manager.

How do I fix CVE-2023-20116?

No fix has been published for CVE-2023-20116 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-2023-20116 being exploited?

There is no known exploitation of CVE-2023-20116 in the wild and no public exploit code.

All Cisco Unified Communications Manager vulnerabilities

Sources

Also known as GHSA-4mm9-fmg4-q68j.