CVE-2023-27857 : Vulnerability Insights and Analysis
Discover the details of CVE-2023-27857, a heap-based buffer overflow vulnerability that can be exploited by a remote attacker to crash ThinServer.exe. Learn about the impact, affected systems, and mitigation steps here.
This CVE, published by Rockwell, details a heap-based buffer overflow vulnerability in Rockwell Automation's ThinManager ThinServer that can be exploited by a remote attacker to crash ThinServer.exe, resulting from a heap-based buffer over-read condition in certain versions.
Understanding CVE-2023-27857
This section will provide an overview of the vulnerability, its impact, technical details, affected systems, exploitation mechanism, and mitigation steps.
What is CVE-2023-27857?
The vulnerability in ThinManager ThinServer arises from a heap-based buffer over-read condition when the message field indicates more data than actually present, allowing an unauthenticated remote attacker to crash ThinServer.exe.
The Impact of CVE-2023-27857
The impact of this vulnerability is rated as HIGH, with a CVSS base score of 7.5. It falls under CAPEC-100 (Overflow Buffers) and poses a risk of denial of service due to a read access violation.
Technical Details of CVE-2023-27857
This section delves into the specifics of the vulnerability, including its description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The heap-based buffer overflow in ThinManager ThinServer occurs due to the mismanagement of input data, leading to a read access violation that can be triggered remotely without authentication.
Affected Systems and Versions
Multiple versions of ThinManager ThinServer ranging from 6.x to 13.0.1 are affected by this vulnerability, making them susceptible to exploitation if not updated.
Exploitation Mechanism
By sending a specially crafted message with manipulated data, a remote attacker can exploit the buffer overflow to trigger a crash in ThinServer.exe, potentially causing a denial of service.
Mitigation and Prevention
To address CVE-2023-27857 and prevent potential attacks, users and administrators should take immediate and long-term security measures, including patching and updating affected systems.
Immediate Steps to Take
Users are advised to update ThinManager ThinServer to versions that address the vulnerability, as specified in the reference article provided by Rockwell Automation.
Long-Term Security Practices
In addition to patching systems promptly, implementing secure coding practices, network segmentation, and regular security audits can enhance overall cybersecurity posture.
Patching and Updates
Regularly applying security patches and updates from Rockwell Automation is crucial to remediate vulnerabilities like CVE-2023-27857 and ensure the ongoing protection of ThinManager ThinServer.