CVE-2022-20692 Cisco IOS XE Software NETCONF Over SSH Denial of Service Vulnerability

High 7.7 Published 15 Apr 2022 Updated 6 Nov 2024

A low-privileged remote attacker can cause a denial of service on Cisco IOS XE devices by exhausting resources via numerous NETCONF over SSH connections.

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

What is CVE-2022-20692?

CVE-2022-20692 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 15 Apr 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the NETCONF over SSH feature of Cisco IOS XE Software could allow a low-privileged, authenticated, remote attacker to cause a denial of service condition (DoS) on an affected device. This vulnerability is due to insufficient resource management. An attacker could exploit this vulnerability by initiating a large number of NETCONF over SSH connections. A successful exploit could allow the attacker to exhaust resources, causing the device to reload and resulting in a DoS condition on an affected device.

Weakness: CWE-400

Which versions are affected by CVE-2022-20692?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2022-20692?

No fix has been published for CVE-2022-20692 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-2022-20692 being exploited?

There is no known exploitation of CVE-2022-20692 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-m4jm-38q7-gpvv.