CVE-2020-16136 Explained : Impact and Mitigation
Learn about CVE-2020-16136, a security flaw in tgstation-server versions 4.4.0 and 4.4.1 allowing authenticated users to download files on the server machine via directory traversal.
In tgstation-server 4.4.0 and 4.4.1, an authenticated user with permission to download logs can exploit a directory traversal vulnerability to download any file on the server machine.
Understanding CVE-2020-16136
What is CVE-2020-16136?
This CVE refers to a security flaw in tgstation-server versions 4.4.0 and 4.4.1 that allows an authenticated user to download files on the server machine through directory traversal.
The Impact of CVE-2020-16136
The vulnerability enables unauthorized access to sensitive files on the server, posing a risk of data exposure and potential misuse by malicious actors.
Technical Details of CVE-2020-16136
Vulnerability Description
An authenticated user can leverage directory traversal sequences in /Administration/Logs/ requests to download files on the server machine accessible by the server process owner.
Affected Systems and Versions
- tgstation-server 4.4.0
- tgstation-server 4.4.1
Exploitation Mechanism
The attacker can exploit directory traversal ../ sequences in /Administration/Logs/ requests to access and download files on the server machine.
Mitigation and Prevention
Immediate Steps to Take
- Restrict user permissions to prevent unauthorized access to sensitive files.
- Implement input validation to sanitize user inputs and prevent directory traversal attacks.
Long-Term Security Practices
- Regularly update and patch the tgstation-server to mitigate known vulnerabilities.
- Conduct security audits to identify and address potential security weaknesses.
Patching and Updates
Apply patches and updates provided by tgstation-server to address the directory traversal vulnerability and enhance overall system security.