CVE-2021-45967 : Vulnerability Insights and Analysis

An issue was discovered in Pascom Cloud Phone System before 7.20.x where a configuration error between NGINX and a backend Tomcat server leads to a path traversal vulnerability.

Understanding CVE-2021-45967

What is CVE-2021-45967?

The CVE-2021-45967 vulnerability involves a path traversal in the Tomcat server due to a misconfiguration error between NGINX and the backend server, which exposes unintended endpoints.

The Impact of CVE-2021-45967

This vulnerability could be exploited by attackers to access sensitive information or execute arbitrary code on the server, potentially leading to unauthorized access or data breaches.

Technical Details of CVE-2021-45967

Vulnerability Description

The issue arises from a misconfiguration in the interaction between NGINX and the Tomcat server, allowing unauthorized access to certain server endpoints.

Affected Systems and Versions

Product: Pascom Cloud Phone System
Versions Affected: Before 7.20.x

Exploitation Mechanism

The path traversal vulnerability can be exploited by manipulating the requests sent through NGINX to access files and directories on the Tomcat server.

Mitigation and Prevention

Immediate Steps to Take

Update Pascom Cloud Phone System to version 7.20.x or above to address the vulnerability.
Implement strict access controls and input validation to prevent unauthorized access.

Long-Term Security Practices

Regularly audit and monitor server configurations and interactions to detect and mitigate misconfigurations promptly.
Train personnel on secure coding practices and the importance of proper server configurations.

Patching and Updates

Apply security patches and updates from Pascom to address known vulnerabilities and enhance overall system security.