CVE-2023-6239 : Exploit Details and Defense Strategies

This CVE, assigned by M-Files Corporation, was published on November 28, 2023. It involves the incorrect calculation of effective permissions in M-Files Server versions 23.9, 23.10, and 23.11 before 23.11.13168.7. This vulnerability could potentially lead to unauthorized access to objects due to specific configurations of metadata-driven permissions.

Understanding CVE-2023-6239

CVE-2023-6239 highlights a security issue where under specific circumstances, the accurate permissions of an object may not be computed properly, potentially enabling unauthorized access to the object in M-Files Server versions 23.9, 23.10, and 23.11 before 23.11.13168.7.

What is CVE-2023-6239?

The vulnerability identified as CVE-2023-6239 pertains to the miscalculation of effective permissions when certain metadata-driven permission configurations are in place in M-Files Server versions mentioned earlier.

The Impact of CVE-2023-6239

Exploiting this vulnerability could result in unauthorized parties gaining access to objects due to the incorrect calculation of permissions, potentially compromising the security and integrity of the system.

Technical Details of CVE-2023-6239

This section delves into the specifics of the vulnerability, including its description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from the incorrect calculation of effective permissions in M-Files Server versions 23.9, 23.10, and 23.11 before 23.11.13168.7, allowing unauthorized access to objects.

Affected Systems and Versions

M-Files Server versions 23.9, 23.10, and 23.11 (before 23.11.13168.7) are affected by this vulnerability due to the specific configurations of metadata-driven permissions.

Exploitation Mechanism

Under rare conditions, unauthorized users may exploit this vulnerability to gain access to objects through incorrectly calculated permissions, posing a risk to the confidentiality and integrity of the system.

Mitigation and Prevention

In light of CVE-2023-6239, taking immediate steps, practicing long-term security measures, and ensuring timely patching and updates are crucial to mitigate the risks associated with this vulnerability.

Immediate Steps to Take

Users are advised to update to the patched version provided by M-Files Corporation to address this vulnerability and prevent unauthorized access to objects.

Long-Term Security Practices

Implementing robust access control policies, continuously monitoring permissions, and conducting regular security audits can enhance the overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

Regularly applying security patches and updating systems to the latest versions recommended by the vendor is essential to protect against known vulnerabilities like CVE-2023-6239.