CVE-2020-3208 : Security Advisory and Response

A vulnerability in the image verification feature of Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers could allow an attacker to boot a malicious software image on an affected device.

Understanding CVE-2020-3208

This CVE involves a security vulnerability in Cisco IOS Software for specific Industrial Integrated Services Routers, potentially enabling unauthorized software image booting.

What is CVE-2020-3208?

The vulnerability in Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers allows a local attacker to load a malicious software image on the device by bypassing image verification.

The Impact of CVE-2020-3208

The vulnerability poses a medium-severity risk with high impacts on confidentiality, integrity, and availability of affected devices.

Technical Details of CVE-2020-3208

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The flaw arises from insufficient access restrictions in the code managing the image verification feature, enabling an attacker to disable image integrity verification and load a malicious image.

Affected Systems and Versions

Product: Cisco IOS 12.2(60)EZ16
Vendor: Cisco
Version: n/a

Exploitation Mechanism

Attacker authenticates to the device and logs into the Virtual Device Server (VDS).
From the VDS shell, the attacker disables image verification, allowing booting of a malicious image.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement strong password policies and multi-factor authentication.
Regularly review and update access controls and permissions.

Patching and Updates

Regularly check for security advisories and updates from Cisco.
Ensure timely installation of patches to mitigate known vulnerabilities.