EUVD-2024-53623

Comprehensive Technical Analysis of EUVD-2024-53623

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The EUVD entry EUVD-2024-53623 describes a vulnerability in CMSimple 5.16 that allows users to edit the log.php file via the print page functionality. This vulnerability is classified as a Broken Access Control issue, where unauthorized users can manipulate sensitive files, potentially leading to significant security breaches.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.1, 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:N indicates 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 skill or resources to exploit.
• Privileges Required (PR): None (N) - No special privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability results in a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability results in a high impact on integrity.
• Availability (A): None (N) - The vulnerability does not impact availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing physical access to the system.
• Unauthenticated Access: The attacker does not need any special privileges or authentication to exploit the vulnerability.

Exploitation Methods:

• File Manipulation: The attacker can manipulate the log.php file by exploiting the print page functionality. This could involve injecting malicious code or altering the file's contents to achieve unauthorized actions.
• Data Exfiltration: By editing the log.php file, an attacker could potentially exfiltrate sensitive information stored in the logs.

3. Affected Systems and Software Versions

Affected Systems:

• CMSimple 5.16: The vulnerability specifically affects version 5.16 of the CMSimple content management system.

Software Versions:

• CMSimple 5.16: This version is confirmed to be vulnerable. Other versions may also be affected, but this has not been explicitly stated in the EUVD entry.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest security patches provided by the CMSimple developers to mitigate the vulnerability.
• Access Controls: Implement strict access controls to restrict unauthorized access to sensitive files and functionalities.
• Monitoring: Enhance monitoring and logging to detect any unauthorized access or modifications to critical files.

Long-Term Strategies:

• Regular Updates: Ensure that all software, including CMSimple, is regularly updated to the latest versions.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential security issues.
• User Training: Educate users on the importance of security best practices and the risks associated with unauthorized file manipulation.

5. Impact on European Cybersecurity Landscape

Regional Impact:

• Data Breaches: The vulnerability could lead to data breaches, compromising the confidentiality and integrity of sensitive information.
• Compliance Issues: Organizations may face compliance issues with regulations such as GDPR if sensitive data is compromised.
• Reputation Damage: Companies using CMSimple 5.16 may suffer reputational damage if the vulnerability is exploited, leading to loss of customer trust.

Broader Implications:

• Supply Chain Risks: The vulnerability could affect supply chain partners and third-party vendors using CMSimple, increasing the risk of cascading security breaches.
• Incident Response: European cybersecurity agencies and incident response teams may need to allocate resources to address and mitigate the impact of this vulnerability.

6. Technical Details for Security Professionals

Vulnerability Details:

• File Path: The vulnerability is associated with the log.php file, which is a critical component for logging activities within CMSimple.
• Exploitation Mechanism: The print page functionality in CMSimple 5.16 allows unauthorized users to edit the log.php file, potentially leading to code injection or data manipulation.

References:

• GitHub Research: Detailed research and proof-of-concept exploits can be found at GitHub Research Link.
• Gist Example: Additional technical details and examples are available at Gist Link.

Conclusion: The vulnerability in CMSimple 5.16 is critical and requires immediate attention from cybersecurity professionals. Organizations using this version should prioritize patching and implementing robust access controls to mitigate the risk of exploitation. The broader European cybersecurity landscape may be impacted, necessitating coordinated efforts to address and mitigate the vulnerability effectively.