CVE-2020-3208 Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers Image Verification Bypass Vulnerability

Medium 6.7 Published 3 Jun 2020 Updated 15 Nov 2024

Authenticated local attackers with high privileges can bypass image verification to boot malicious software on Cisco Industrial Routers.

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

What is CVE-2020-3208?

CVE-2020-3208 is a medium-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 image verification feature of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) could allow an authenticated, local attacker to boot a malicious software image on an affected device. The vulnerability is due to insufficient access restrictions on the area of code that manages the image verification feature. An attacker could exploit this vulnerability by first authenticating to the targeted device and then logging in to the Virtual Device Server (VDS) of an affected device. The attacker could then, from the VDS shell, disable Cisco IOS Software integrity (image) verification. A successful exploit could allow the attacker to boot a malicious Cisco IOS Software image on the targeted device. To exploit this vulnerability, the attacker must have valid user credentials at privilege level 15.

Weakness: CWE-264

Which versions are affected by CVE-2020-3208?

It affects 1 product.

Products include Cisco Ios.

How do I fix CVE-2020-3208?

No fix has been published for CVE-2020-3208 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3208 being exploited?

There is no known exploitation of CVE-2020-3208 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-xcmg-f9fr-wgj3.