Description
A Protection Mechanism Failure vulnerability in mmaitre314 picklescan versions up to and including 0.0.30 allows a remote attacker to bypass the unsafe globals check. This is possible because the scanner performs an exact match for module names, allowing malicious payloads to be loaded via submodules of dangerous packages (e.g., 'asyncio.unix_events' instead of 'asyncio'). When the incorrectly considered safe file is loaded after scan, it can lead to the execution of malicious code.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-29711
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-29711 pertains to a Protection Mechanism Failure in the picklescan tool, specifically in versions up to and including 0.0.30. This vulnerability allows a remote attacker to bypass the unsafe globals check, leading to the execution of malicious code. The severity of this vulnerability is rated with a Base Score of 9.3 according to CVSS 4.0, indicating a critical risk. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N highlights the following:
- Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal complexity to execute.
- Authentication (AT): None (N) - No authentication is required to exploit the vulnerability.
- Privileges Required (PR): None (N) - No special privileges are needed.
- User Interaction (UI): None (N) - No user interaction is required.
- Confidentiality (VC): High (H) - The vulnerability can lead to a high impact on confidentiality.
- Integrity (VI): High (H) - The vulnerability can lead to a high impact on integrity.
- Availability (VA): High (H) - The vulnerability can lead to a high impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves exploiting the exact match mechanism for module names in the picklescan tool. An attacker can craft a malicious payload that mimics a submodule of a dangerous package, such as asyncio.unix_events instead of asyncio. When the scanner incorrectly considers this file safe and loads it, it can lead to the execution of malicious code.
Potential exploitation methods include:
- Remote Code Execution (RCE): By injecting a malicious submodule, an attacker can execute arbitrary code on the target system.
- Supply Chain Attacks: An attacker could compromise the integrity of the software supply chain by injecting malicious submodules into legitimate packages.
3. Affected Systems and Software Versions
The vulnerability affects all versions of picklescan up to and including 0.0.30. Organizations and individuals using these versions are at risk and should take immediate action to mitigate the threat.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Update to the Latest Version: Ensure that all instances of
picklescanare updated to a version higher than 0.0.30, where the vulnerability has been addressed. - Implement Strict Module Validation: Enhance the module validation process to include more robust checks beyond exact matches.
- Regular Security Audits: Conduct regular security audits and code reviews to identify and address similar vulnerabilities.
- Network Segmentation: Implement network segmentation to limit the potential impact of a successful exploit.
- Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to module loading and execution.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations relying on picklescan for security scanning. The potential for remote code execution and supply chain attacks can lead to widespread compromise, affecting confidentiality, integrity, and availability of critical systems. This underscores the need for robust security practices and continuous monitoring within the European cybersecurity community.
6. Technical Details for Security Professionals
For security professionals, the following technical details are crucial:
- Vulnerable Code Location: The vulnerability is located in the
scanner.pyfile, specifically around line 309, where the module name matching logic is implemented. - Exploit Mechanism: The exploit involves crafting a submodule name that bypasses the exact match check, allowing the loading of malicious code.
- References for Further Analysis:
By understanding these details, security professionals can better assess the risk, implement effective mitigation strategies, and ensure the security of their systems.
Conclusion
The vulnerability EUVD-2025-29711 in picklescan is critical and requires immediate attention. Organizations should prioritize updating to the latest version, implementing robust security measures, and continuously monitoring their systems to mitigate the risk of exploitation. The European cybersecurity community must remain vigilant and proactive in addressing such vulnerabilities to maintain the integrity and security of their digital infrastructure.