CVE-2025-11148

Comprehensive Technical Analysis of CVE-2025-11148

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-11148

Description: The vulnerability affects all versions of the check-branches package, a command-line tool used to confirm the absence of conflicts in Git branches. The tool is susceptible to Command Injection due to its handling of branch names as plain text and its method of spawning Git commands by concatenating user input.

Severity: The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for complete system compromise, as an attacker can execute arbitrary commands on the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Remote Exploitation: An attacker can create a branch with a malicious name via a pull request, which, when processed by check-branches, can execute arbitrary commands.
2. Local Exploitation: Users with privileged access to the repository can create branches with malicious names directly.

Exploitation Methods:

• Command Injection: By crafting a branch name that includes command injection payloads (e.g., ; rm -rf /), an attacker can execute arbitrary commands on the system running check-branches.
• Privilege Escalation: If the tool runs with elevated privileges, the attacker can gain higher-level access to the system.

3. Affected Systems and Software Versions

Affected Systems:

• Any system running the check-branches tool, including local development environments and Continuous Integration (CI) pipelines.

Software Versions:

• All versions of the check-branches package are affected.

4. Recommended Mitigation Strategies

Immediate Mitigation:

1. Input Sanitization: Implement strict input validation and sanitization for branch names to prevent command injection.
2. Parameterized Commands: Use parameterized commands instead of concatenating user input directly into command strings.
3. Least Privilege: Ensure that the check-branches tool runs with the least privilege necessary to minimize potential damage.

Long-Term Mitigation:

1. Update to Patched Version: Once available, update to a patched version of the check-branches package that addresses the vulnerability.
2. Regular Audits: Conduct regular security audits of all tools and libraries used in the development and CI/CD pipelines.

5. Impact on Cybersecurity Landscape

Impact:

• Widespread Adoption: Tools like check-branches are commonly used in development and CI/CD pipelines, making this vulnerability potentially widespread.
• Supply Chain Risk: The vulnerability highlights the risks associated with third-party tools and libraries, emphasizing the need for robust supply chain security practices.
• Increased Awareness: This incident underscores the importance of secure coding practices, particularly in handling user input and executing system commands.

6. Technical Details for Security Professionals

Technical Analysis:

• Vulnerability Type: Command Injection
• Root Cause: The tool trusts branch names as plain text and concatenates them directly into command strings, allowing for command injection.
• Exploitation: An attacker can craft a branch name that includes command injection payloads, leading to arbitrary command execution.

Detection and Monitoring:

1. Log Analysis: Monitor logs for unusual command executions or errors related to command injection attempts.
2. Anomaly Detection: Implement anomaly detection mechanisms to identify and alert on unusual branch names or command executions.
3. Code Review: Conduct thorough code reviews to identify and mitigate similar vulnerabilities in other tools and libraries.

Conclusion: CVE-2025-11148 is a critical vulnerability affecting the check-branches package, highlighting the risks of command injection in tools that handle user input. Immediate mitigation strategies include input sanitization and parameterized commands, while long-term solutions involve updating to patched versions and conducting regular security audits. This vulnerability underscores the importance of secure coding practices and robust supply chain security measures in the cybersecurity landscape.