CVE-2024-20390 Cisco IOS XR Software Dedicated XML Agent TCP Denial of Service Vulnerability

Medium 5.3 Published 11 Sep 2024 Updated 11 Sep 2024

Unauthenticated remote attackers can cause denial of service on the XML TCP port by sending crafted XML traffic to Cisco IOS XR 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-2024-20390?

CVE-2024-20390 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 11 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Dedicated XML Agent feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on XML TCP listen port 38751. This vulnerability is due to a lack of proper error validation of ingress XML packets. An attacker could exploit this vulnerability by sending a sustained, crafted stream of XML traffic to a targeted device. A successful exploit could allow the attacker to cause XML TCP port 38751 to become unreachable while the attack traffic persists.

Weakness: CWE-940

Which versions are affected by CVE-2024-20390?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2024-20390?

No fix has been published for CVE-2024-20390 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-2024-20390 being exploited?

There is no known exploitation of CVE-2024-20390 in the wild and no public exploit code.

All Cisco Ios Xr vulnerabilities

Sources

Also known as GHSA-4pqw-cgvq-97j3.