CVE-2024-20375 Denial of service in Cisco Unified Communications Manager

High 8.6 Published 21 Aug 2024 Updated 23 Aug 2024

Unauthenticated remote attackers can cause a denial of service by sending crafted SIP messages to Cisco Unified Communications Manager devices.

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-2024-20375?

CVE-2024-20375 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 21 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper parsing of SIP messages. An attacker could exploit this vulnerability by sending a crafted SIP message to an affected Cisco Unified CM or Cisco Unified CM SME device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition that interrupts the communications of reliant voice and video devices.

Weakness: CWE-787

Which versions are affected by CVE-2024-20375?

It affects 1 product.

Products include Cisco Unified Communications Manager.

How do I fix CVE-2024-20375?

No fix has been published for CVE-2024-20375 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-2024-20375 being exploited?

There is no known exploitation of CVE-2024-20375 in the wild and no public exploit code.

All Cisco Unified Communications Manager vulnerabilities

Sources

Also known as GHSA-2v3w-9hfq-fx33.