CVE-2024-20319 Security feature bypass in Cisco IOS XR Software

Medium 4.3 Published 13 Mar 2024 Updated 1 Aug 2024

An unauthenticated adjacent attacker can bypass management plane protection to access the SNMP server on Cisco IOS XR devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-20319?

CVE-2024-20319 is a medium-severity vulnerability in Cisco Ios Xr, published on 13 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device. This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.

Weakness: CWE-284

Which versions are affected by CVE-2024-20319?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2024-20319?

No fix has been published for CVE-2024-20319 yet. Limit exposure of the affected software until one is available.

Is CVE-2024-20319 being exploited?

There is no known exploitation of CVE-2024-20319 in the wild and no public exploit code.

All Cisco Ios Xr vulnerabilities

Sources

Also known as GHSA-936v-x9xm-gc22.