CVE-2017-7981 Explained : Impact and Mitigation
Learn about CVE-2017-7981, a command injection vulnerability in Tuleap before version 9.7. Find out how an authenticated user can execute arbitrary commands and how to mitigate the risk.
Tuleap before version 9.7 is vulnerable to command injection through the PhpWiki 1.3.10 SyntaxHighlighter plugin. This CVE allows an authenticated user to execute arbitrary commands on the system.
Understanding CVE-2017-7981
This CVE involves a command injection vulnerability in Tuleap, specifically in the Project Wiki component.
What is CVE-2017-7981?
CVE-2017-7981 is a security vulnerability in Tuleap that allows an authenticated user to perform command injection through the PhpWiki 1.3.10 SyntaxHighlighter plugin. By manipulating the syntax value in the proc_open PHP function, an attacker can execute arbitrary commands on the system.
The Impact of CVE-2017-7981
The vulnerability can be exploited by an authenticated user to execute arbitrary commands on the system, potentially leading to unauthorized access, data theft, or system compromise.
Technical Details of CVE-2017-7981
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability exists in Tuleap versions prior to 9.7 due to improper input validation in the PhpWiki 1.3.10 SyntaxHighlighter plugin. An attacker can manipulate the syntax value in the proc_open PHP function to execute arbitrary commands.
Affected Systems and Versions
- Tuleap versions prior to 9.7
- PhpWiki versions before 1.5.5
Exploitation Mechanism
An authenticated Tuleap user can exploit the vulnerability by inserting a malicious line '<?plugin SyntaxHighlighter syntax="c;id"' to execute the id command.
Mitigation and Prevention
Protect your systems from CVE-2017-7981 with the following measures:
Immediate Steps to Take
- Upgrade Tuleap to version 9.7 or later to mitigate the vulnerability.
- Regularly monitor and review user-generated content in the Project Wiki component.
Long-Term Security Practices
- Implement strict input validation and sanitization mechanisms in web applications.
- Conduct regular security training for users to raise awareness about potential threats.
Patching and Updates
- Apply security patches and updates provided by Tuleap to address known vulnerabilities.