CVE-2022-1161 Explained : Impact and Mitigation

A vulnerability has been identified in Rockwell Automation Logix Controllers that could allow an attacker to modify user program code on certain ControlLogix, CompactLogix, and GuardLogix Control systems. This could lead to unauthorized changes in program code execution.

Understanding CVE-2022-1161

This CVE affects various Rockwell Automation controllers, posing a critical threat to the integrity, confidentiality, and availability of user programs.

What is CVE-2022-1161?

An attacker with the ability to modify a user program may change user program code on some ControlLogix, CompactLogix, and GuardLogix Control systems. This occurs due to a flaw in how Studio 5000 Logix Designer handles program code storage and execution locations.

The Impact of CVE-2022-1161

The vulnerability has a CVSS base score of 10, indicating a critical severity level. It poses a high risk to confidentiality, integrity, and availability, with low attack complexity and no user interaction required.

Technical Details of CVE-2022-1161

The affected Rockwell Automation controllers include various models like ControlLogix, CompactLogix, GuardLogix, and FlexLogix. The vulnerability stems from the separation of user-readable program code from the executed compiled code.

Vulnerability Description

By exploiting this vulnerability, an attacker could manipulate user program code, potentially leading to unauthorized changes in program behavior.

Affected Systems and Versions

Multiple Rockwell Automation controllers are impacted, including ControlLogix 5580, GuardLogix 5380, CompactLogix 5480, and more, across various versions.

Exploitation Mechanism

The vulnerability allows attackers to modify user program code, creating a mismatch with the executed code, thereby affecting system behavior and integrity.

Mitigation and Prevention

Given the critical nature of this vulnerability, immediate action is necessary to prevent exploitation and protect industrial control systems.

Immediate Steps to Take

Affected users should recompile and download user program code, monitor controller change logs, and leverage security features like Controller Log and Change Detection.

Long-Term Security Practices

Implementing CIP Security and utilizing FactoryTalk AssetCenter software can help prevent unauthorized connections and detect changes in controllers and communications modules.

Patching and Updates

Ensure to follow vendor guidelines for patching affected systems and regularly update security measures to mitigate the risk of exploitation.