CVE-2020-3234 Cisco IOS Software for Cisco Industrial Routers Virtual Device Server Static Credentials Vulnerability

High 8.8 Published 3 Jun 2020 Updated 15 Nov 2024

A local attacker with low privileges can use hardcoded credentials to access the Virtual Device Server root shell on Cisco Industrial Routers.

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

What is CVE-2020-3234?

CVE-2020-3234 is a high-severity vulnerability in Cisco Ios, published on 3 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the virtual console authentication of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an authenticated but low-privileged, local attacker to log in to the Virtual Device Server (VDS) of an affected device by using a set of default credentials. The vulnerability is due to the presence of weak, hard-coded credentials. An attacker could exploit this vulnerability by authenticating to the targeted device and then connecting to VDS through the device’s virtual console by using the static credentials. A successful exploit could allow the attacker to access the Linux shell of VDS as the root user.

Weakness: CWE-798

Which versions are affected by CVE-2020-3234?

It affects 1 product.

Products include Cisco Ios.

How do I fix CVE-2020-3234?

No fix has been published for CVE-2020-3234 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3234 being exploited?

There is no known exploitation of CVE-2020-3234 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-8cj5-64j8-7h9h.