EUVD-2023-38999

Comprehensive Technical Analysis of EUVD-2023-38999

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The EUVD entry EUVD-2023-38999 describes a command injection vulnerability in the wsConvertPpt component of Chamilo versions 1.11.* up to 1.11.18. This vulnerability allows attackers to execute arbitrary commands via a SOAP API call with a crafted PowerPoint name.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.8, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity score underscores the critical nature of the vulnerability, which can lead to complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• SOAP API Calls: Attackers can exploit this vulnerability by crafting malicious SOAP API calls to the wsConvertPpt component.
• Crafted PowerPoint Names: By embedding malicious commands within the PowerPoint file name, attackers can trigger command injection.

Exploitation Methods:

• Command Injection: Attackers can inject commands into the system by manipulating the PowerPoint file name parameter in the SOAP API call.
• Remote Code Execution (RCE): Successful exploitation can lead to arbitrary command execution, allowing attackers to run malicious code on the affected system.

3. Affected Systems and Software Versions

Affected Systems:

• Chamilo versions 1.11.* up to 1.11.18

Software Versions:

• All versions within the specified range are vulnerable.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to a patched version of Chamilo that addresses this vulnerability.
• Disable SOAP API: If possible, disable the wsConvertPpt component or restrict access to the SOAP API.

Long-Term Mitigations:

• Input Validation: Implement strict input validation and sanitization for all user-supplied data, especially file names.
• Least Privilege: Ensure that the application runs with the least privileges necessary to minimize the impact of a successful exploit.
• Network Segmentation: Segment the network to limit the attack surface and contain potential breaches.
• Monitoring and Logging: Enhance monitoring and logging to detect and respond to suspicious activities.

5. Impact on European Cybersecurity Landscape

Impact Assessment:

• Widespread Use: Chamilo is widely used in educational institutions and organizations across Europe, making this vulnerability a significant threat.
• Critical Infrastructure: Educational systems are part of the critical infrastructure, and a breach could lead to data theft, disruption of services, and loss of trust.
• Regulatory Compliance: Organizations must ensure compliance with regulations such as GDPR, which mandates the protection of personal data.

Regulatory and Policy Implications:

• Incident Reporting: Organizations must report incidents to relevant authorities and follow incident response protocols.
• Security Audits: Regular security audits and vulnerability assessments should be conducted to identify and mitigate similar vulnerabilities.

6. Technical Details for Security Professionals

Technical Analysis:

• Vulnerability Type: Command Injection
• Affected Component: wsConvertPpt
• Exploitation Method: Crafted SOAP API calls with malicious PowerPoint file names
• Impact: Arbitrary command execution leading to potential system compromise

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to detect unusual SOAP API calls and command injection attempts.
• Incident Response Plan: Develop and implement an incident response plan tailored to command injection vulnerabilities.
• Security Training: Conduct regular training for IT staff on secure coding practices and vulnerability management.

References:

• Chamilo Official Website
• Chamilo Security Issues
• Packet Storm Security

Aliases:

• CVE-2023-34960
• GSD-2023-34960

Assigner:

• Mitre

EPSS Score:

• 94 (indicating a high likelihood of exploitation)

ENISA ID:

• Product: n/a
• Vendor: n/a

By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and protect their systems and data from potential attacks.