CVE-2022-26335 : What You Need to Know

A vulnerability has been identified in several Siemens SCALANCE devices that could allow an unauthenticated remote attacker to crash affected devices due to improper validation of incoming HTTP GET requests.

Understanding CVE-2022-26335

This CVE identifies a critical vulnerability in various SCALANCE devices by Siemens, potentially leading to a denial of service condition.

What is CVE-2022-26335?

The vulnerability in affected SCALANCE devices arises from their failure to properly validate the URI of incoming HTTP GET requests. This oversight could be exploited by an unauthenticated remote attacker to crash the impacted devices, disrupting operations.

The Impact of CVE-2022-26335

The impact of this vulnerability is significant as it allows attackers to remotely crash affected SCALANCE devices, leading to potential disruptions in industrial processes and network operations.

Technical Details of CVE-2022-26335

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in SCALANCE devices occurs due to a lack of validation in the URI of incoming HTTP GET requests, potentially enabling remote attackers to crash the affected devices.

Affected Systems and Versions

Multiple SCALANCE devices are impacted by this vulnerability, including SCALANCE X302-7 EEC, SCALANCE X304-2FE, SCALANCE X308-2M, and others, running versions below V4.1.4.

Exploitation Mechanism

The vulnerability could be exploited remotely by sending malicious HTTP GET requests with manipulated URIs, causing the devices to crash.

Mitigation and Prevention

To address CVE-2022-26335, immediate actions and long-term security practices are essential to safeguard industrial systems.

Immediate Steps to Take

Apply patches and updates provided by Siemens to mitigate the vulnerability promptly.
Monitor network traffic for any suspicious activity that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update firmware and security patches for SCALANCE devices to address emerging threats.
Implement network segmentation and access controls to limit unauthorized access to critical industrial systems.

Patching and Updates

Siemens has released security advisory SSA-836527 detailing the vulnerability and necessary patches. It is critical to apply the provided updates to protect SCALANCE devices from potential exploitation.