CVE-2023-2917 : Vulnerability Insights and Analysis

This CVE-2023-2917 relates to an input validation vulnerability found in Rockwell Automation's ThinManager ThinServer software.

Understanding CVE-2023-2917

This vulnerability affects various versions of the ThinManager ThinServer software by Rockwell Automation, potentially allowing for remote code execution by an unauthenticated attacker.

What is CVE-2023-2917?

The vulnerability stems from improper input validation within the ThinManager ThinServer software. It enables a path traversal exploit through the filename field during a specific function's processing. This flaw could permit an attacker to upload arbitrary files to any directory on the disk drive where ThinServer.exe is located. Exploiting this vulnerability could grant the attacker remote code execution capabilities.

The Impact of CVE-2023-2917

The impact of CVE-2023-2917 is critical, with a CVSSv3.1 base score of 9.8 (Critical). It has a high impact on confidentiality, integrity, and availability, making it a severe security issue.

Technical Details of CVE-2023-2917

This section provides more insight into the vulnerability's technical aspects.

Vulnerability Description

The vulnerability is categorized as CWE-20 (Improper Input Validation) and CAPEC-126 (Path Traversal), highlighting the flaw's nature and potential exploit scenarios.

Affected Systems and Versions

The affected versions of ThinManager ThinServer include 11.0.0 to 11.2.6, 11.1.0 to 11.1.6, 11.2.0 to 11.2.7, 12.0.0 to 12.0.5, 12.1.0 to 12.1.6, 13.0.0 to 13.0.2, and 13.1.0.

Exploitation Mechanism

The exploitation occurs through an unauthenticated remote attacker sending a specially crafted synchronization protocol message to the ThinManager server, leading to the upload of malicious files and potential remote code execution.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks associated with CVE-2023-2917.

Immediate Steps to Take

Update the software to the latest patched versions provided by Rockwell Automation.
Restrict remote access for TCP Port 2031 only to known Thin Clients and ThinManager servers.

Long-Term Security Practices

Implement regular security assessments, including vulnerability scanning and penetration testing, to identify and remediate potential security weaknesses proactively.

Patching and Updates

Stay informed about security updates released by Rockwell Automation for the ThinManager ThinServer software and apply them promptly to ensure protection against known vulnerabilities.