CVE-2022-37774 - Broken Access Control Vulnerability in Maarch RM 2.8.3 Resulting in Unauthorized Access to Documents

Hello everyone! In this post, we will discuss an important security issue, identified as CVE-2022-37774, which affects the popular records management solution, Maarch RM version 2.8.3. This vulnerability, classified as a broken access control vulnerability, allows unauthorized users to access sensitive documents without authentication. We will explore the technical details of this vulnerability, the cause of the problem, and an example of how an attacker could exploit this weakness. Finally, we will share some useful links to the original references and discuss the potential impact of this issue on the affected systems.

Vulnerability Details

Maarch RM is a widely-used, open-source solution for managing electronic and physical archives, such as emails, PDFs, and other document formats. In Maarch RM v2.8.3, a broken access control vulnerability has been discovered that allows unauthorized access to documents without authentication, simply by knowing the URL of the document's preview.

This vulnerability occurs because the preview functionality generates a URL for the document that includes an MD5 hash of the file being accessed. The generated URL, in the format https://{url}/tmp/{MD5 hash of the document}, is accessible without any authentication, opening the door to unauthorized access.

Exploit Example

The following example demonstrates how this vulnerability can be exploited. Consider a scenario where a malicious user has knowledge of the URL format and a target's URL.

1. First, the attacker finds the target URL, for example: https://example.com

2. Next, the attacker needs to calculate the MD5 hash of the target document. This can be done using a tool such as this online MD5 hash generator.

3. With the MD5 hash in hand, the attacker constructs the preview URL, like this: https://example.com/tmp/{MD5 hash}.

The attacker can now access the document through the constructed URL without any authentication.

It is evident that this vulnerability can be leveraged easily by attackers, leading to unauthorized access to sensitive documents stored in the system.

Possible Consequences and Impact

The unauthorized access to sensitive documents poses significant security and privacy risks for the affected users and systems. This can lead to:

To get more details on this vulnerability, check out the following original references

- CVE-2022-37774 - Official Description and Details of the Security Vulnerability.
- National Vulnerability Database (NVD) Entry for CVE-2022-37774 - Additional Information and Impact Analysis.

Conclusion

In this post, we discussed the broken access control vulnerability (CVE-2022-37774) in Maarch RM 2.8.3, which enables unauthorized access to documents without authentication. We also provided an example of how this vulnerability can be exploited, the potential consequences of successful exploitation, and useful links to the original references.

It is crucial for organizations using Maarch RM version 2.8.3 to address this vulnerability by updating their systems and implementing appropriate security measures. Users and system administrators should keep an eye on any security announcements from Maarch and apply patches as soon as they become available. Maintaining a proactive approach to security can help prevent unauthorized access, protect sensitive data and, ultimately, minimize the impact of this and other vulnerabilities.

Timeline

Published on: 11/23/2022 00:15:00 UTC
Last modified on: 11/26/2022 03:33:00 UTC