CVE-2020-5758 : Security Advisory and Response

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can execute commands as the root user by sending a crafted HTTP GET to the UCM's "Old" HTTPS API.

Understanding CVE-2020-5758

Grandstream UCM6200 Series is susceptible to OS command injection through HTTP requests, potentially allowing unauthorized remote access.

What is CVE-2020-5758?

This CVE identifies a security vulnerability in Grandstream UCM6200 Series firmware versions 1.0.20.23 and below, enabling authenticated attackers to execute commands as the root user via specially crafted HTTP requests.

The Impact of CVE-2020-5758

The exploitation of this vulnerability could lead to unauthorized access and control over the affected system, posing a significant security risk to organizations utilizing the Grandstream UCM6200 Series.

Technical Details of CVE-2020-5758

Grandstream UCM6200 Series firmware version 1.0.20.23 and below is vulnerable to OS command injection through HTTP requests.

Vulnerability Description

The vulnerability allows authenticated remote attackers to execute commands as the root user by sending a malicious HTTP GET request to the UCM's "Old" HTTPS API.

Affected Systems and Versions

Product: Grandstream UCM6200 Series
Versions Affected: 1.0.20.23 and below

Exploitation Mechanism

The vulnerability can be exploited by sending a crafted HTTP GET request to the UCM's "Old" HTTPS API, enabling attackers to execute arbitrary commands with root privileges.

Mitigation and Prevention

Immediate action is crucial to mitigate the risks associated with CVE-2020-5758.

Immediate Steps to Take

Update the Grandstream UCM6200 Series firmware to a version that addresses the vulnerability.
Implement network segmentation to restrict access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and security patches for all network devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Ensure timely installation of security patches and updates provided by Grandstream for the UCM6200 Series to remediate the vulnerability.