CVE-2022-46353 : Security Advisory and Response

A vulnerability has been identified in SCALANCE X204RNA (HSR) and other versions, allowing an unauthenticated remote attacker to brute-force session ids and hijack existing sessions.

Understanding CVE-2022-46353

This vulnerability affects multiple versions of Siemens products, potentially leading to session hijacking by unauthorized attackers.

What is CVE-2022-46353?

CVE-2022-46353 is a security flaw found in SCALANCE X204RNA (HSR) and related products. The issue arises from the insecure calculation of session ids and nonces by the webserver of affected devices.

The Impact of CVE-2022-46353

The vulnerability poses a significant risk as it could permit unauthenticated malicious actors to perform session hijacking by brute-forcing session ids.

Technical Details of CVE-2022-46353

The technical details of CVE-2022-46353 include:

Vulnerability Description

The flaw originates from the insecure manner in which session ids and nonces are computed by the webserver of affected Siemens devices.

Affected Systems and Versions

Multiple Siemens products are affected, including SCALANCE X204RNA (HSR) and various versions prior to V3.2.7.

Exploitation Mechanism

Unauthorized remote attackers can exploit this vulnerability to potentially brute-force session ids and hijack existing user sessions.

Mitigation and Prevention

To address CVE-2022-46353, consider the following steps:

Immediate Steps to Take

Implement security patches provided by Siemens to remediate the vulnerability.
Ensure access controls and monitoring mechanisms are in place to detect unauthorized access attempts.

Long-Term Security Practices

Regularly update and patch Siemens devices to prevent security vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Stay informed about security updates and advisories from Siemens to promptly apply patches and safeguards against known vulnerabilities.