CVE-2025-10156

Comprehensive Technical Analysis of CVE-2025-10156

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-10156 CVSS Score: 9.8

The vulnerability in question is an "Improper Handling of Exceptional Conditions" in the ZIP archive scanning component of mmaitre314 picklescan. This vulnerability allows a remote attacker to bypass security scans by crafting a ZIP archive with a file containing a bad Cyclic Redundancy Check (CRC). When the scanner encounters this bad CRC, it halts, failing to analyze the contents for malicious pickle files. This can lead to the execution of malicious code when the file is loaded.

Severity Evaluation:

• CVSS Base Score: 9.8 (Critical)
• Impact: High
• Exploitability: High

The high CVSS score indicates a critical vulnerability that can be easily exploited with severe consequences, including remote code execution.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Malicious ZIP Archive: An attacker can craft a ZIP archive with a file containing a bad CRC. This archive can be distributed through various means such as email attachments, download links, or embedded in web pages.
2. Supply Chain Attacks: An attacker could compromise a legitimate software distribution channel by injecting the malicious ZIP archive into the supply chain.

Exploitation Methods:

1. Crafting Malicious ZIP Archive: The attacker creates a ZIP archive with a file that has a bad CRC. This file can contain malicious pickle data.
2. Distribution: The malicious ZIP archive is distributed to the target systems.
3. Bypassing Security Scans: When the picklescan tool encounters the bad CRC, it halts the scan, allowing the malicious file to pass through undetected.
4. Execution: The malicious pickle file is loaded and executed, leading to arbitrary code execution on the target system.

3. Affected Systems and Software Versions

Affected Software:

• mmaitre314 picklescan versions prior to v0.0.29

Affected Systems:

• Any system that uses mmaitre314 picklescan for scanning ZIP archives, particularly those that handle pickle files.

4. Recommended Mitigation Strategies

1. Update Software: Upgrade to mmaitre314 picklescan version v0.0.29 or later, which includes a fix for this vulnerability.
2. Implement Additional Scanning: Use multiple scanning tools to ensure that malicious files are detected even if one tool fails.
3. Enhanced Validation: Implement additional validation checks for ZIP archives, including CRC validation and integrity checks.
4. Network Segmentation: Segment networks to limit the spread of malicious code in case of a successful exploit.
5. User Education: Educate users about the risks of downloading and opening ZIP archives from untrusted sources.

5. Impact on Cybersecurity Landscape

This vulnerability highlights the importance of robust error handling and multiple layers of security in scanning tools. It underscores the need for continuous monitoring and updating of security tools to address newly discovered vulnerabilities. The potential for remote code execution makes this vulnerability particularly dangerous, as it can be exploited to gain control over affected systems.

6. Technical Details for Security Professionals

Vulnerability Details:

• Component: ZIP archive scanning component of mmaitre314 picklescan
• Trigger: Bad CRC in a file within a ZIP archive
• Effect: Halts the scanning process, allowing malicious files to pass through

Code Reference:

• The vulnerability is located in the relaxed_zipfile.py file at line 35.
• GitHub Link

Advisory:

• Detailed advisory and mitigation steps can be found at:
• GitHub Security Advisory

Recommendations:

• Code Review: Conduct a thorough code review of the picklescan tool to identify and fix similar vulnerabilities.
• Penetration Testing: Perform regular penetration testing to identify and mitigate potential vulnerabilities.
• Incident Response: Develop and implement an incident response plan to quickly address any exploitation attempts.

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their systems from potential attacks.