CVE-2022-33137 : Vulnerability Insights and Analysis

A vulnerability has been identified in SIMATIC MV540 H, SIMATIC MV540 S, SIMATIC MV550 H, SIMATIC MV550 S, SIMATIC MV560 U, SIMATIC MV560 X devices. The web session management flaw could allow an authenticated remote attacker to hijack other users' sessions by not invalidating session ids.

Understanding CVE-2022-33137

This CVE-2022-33137 vulnerability affects multiple Siemens SIMATIC devices due to insufficient session expiration.

What is CVE-2022-33137?

The vulnerability in affected devices allows an authenticated remote attacker to hijack other users' sessions as the session ids are not invalidated during certain logout scenarios.

The Impact of CVE-2022-33137

An attacker could exploit this flaw to impersonate other users, potentially gaining unauthorized access to sensitive information or performing malicious actions on the targeted device.

Technical Details of CVE-2022-33137

This vulnerability is categorized as CWE-613: Insufficient Session Expiration. It affects all versions of SIMATIC MV540 H, SIMATIC MV540 S, SIMATIC MV550 H, SIMATIC MV550 S, SIMATIC MV560 U, SIMATIC MV560 X devices below V3.3.

Vulnerability Description

The flaw arises from the web session management process failing to invalidate session ids in specific logout scenarios.

Affected Systems and Versions

All versions of SIMATIC MV540 H, SIMATIC MV540 S, SIMATIC MV550 H, SIMATIC MV550 S, SIMATIC MV560 U, SIMATIC MV560 X devices less than V3.3 are impacted.

Exploitation Mechanism

An authenticated remote attacker can exploit this vulnerability to take control of other users' sessions on the affected devices.

Mitigation and Prevention

To address CVE-2022-33137, apply security best practices and follow the recommended steps below:

Immediate Steps to Take

Siemens users should update the affected devices to version V3.3 or newer to mitigate the vulnerability.

Long-Term Security Practices

Regularly monitor and enforce session management and expiration policies to ensure secure user sessions.

Patching and Updates

Stay informed about security updates and advisories from Siemens to promptly apply patches for any identified vulnerabilities.