Compliance Impact

This vulnerability allows authenticated attackers to read arbitrary files on the server, including sensitive system files, through directory traversal attacks. Such unauthorized access to sensitive information could lead to data breaches, potentially violating data protection regulations like GDPR and HIPAA that require safeguarding personal and sensitive data. Therefore, exploitation of this vulnerability may result in non-compliance with these standards due to exposure of confidential information. [1, 2]

Useful 0 Not Useful 0

Executive Summary

CVE-2019-25258 is a set of multiple post-authentication directory traversal vulnerabilities in LogicalDOC Enterprise versions up to 7.7.4. The vulnerabilities occur because the application does not properly validate user input passed through the 'suffix' and 'fileVersion' parameters. Attackers who are authenticated can exploit these flaws by manipulating these parameters in HTTP requests to the /thumbnail and /convertpdf endpoints, allowing them to traverse directories and read arbitrary local files on the server, such as sensitive system files like 'win.ini' on Windows or '/etc/passwd' on Linux. [1, 2]

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow an authenticated attacker to read arbitrary files on the server hosting LogicalDOC Enterprise. This can lead to exposure of sensitive system and application information, potentially aiding further attacks or unauthorized access. Since attackers can access critical files like 'win.ini' or '/etc/passwd', it may compromise system security and confidentiality of data managed by the document management system. [1, 2]

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by attempting to exploit the directory traversal in the 'suffix' and 'fileVersion' parameters after authentication. For example, sending crafted HTTP GET requests to the /thumbnail and /convertpdf endpoints with directory traversal payloads to read sensitive files like 'windows\win.ini' or '/etc/passwd'. Example commands using curl could be: 1. curl -u <username>:<password> "http://<target>/thumbnail?suffix=..\..\windows\win.ini" 2. curl -u <username>:<password> "http://<target>/convertpdf?fileVersion=../../etc/passwd" Successful retrieval of these files indicates the presence of the vulnerability. [1]

Useful 0 Not Useful 0

Mitigation Strategies

Immediate mitigation steps include restricting access to the affected endpoints (/thumbnail and /convertpdf) to trusted users only, applying strict input validation and sanitization on the 'suffix' and 'fileVersion' parameters to prevent directory traversal sequences, and ensuring that only authorized users can authenticate. Additionally, monitoring and blocking suspicious requests attempting directory traversal patterns can help reduce risk until a patch or update is applied. [1, 2]

Useful 0 Not Useful 0