CVE-2020-5757 : Vulnerability Insights and Analysis
Learn about CVE-2020-5757, a critical OS command injection vulnerability in Grandstream UCM6200 Series firmware versions 1.0.20.23 and below, allowing attackers to execute commands as the root user.
Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can bypass command injection mitigations and execute commands as the root user by sending a crafted HTTP POST to the UCM's "New" HTTPS API.
Understanding CVE-2020-5757
This CVE involves a critical vulnerability in the Grandstream UCM6200 Series firmware that allows authenticated remote attackers to execute commands as the root user.
What is CVE-2020-5757?
CVE-2020-5757 is a security vulnerability in the Grandstream UCM6200 Series firmware versions 1.0.20.23 and below, enabling OS command injection via HTTP.
The Impact of CVE-2020-5757
The vulnerability allows attackers to bypass command injection mitigations and gain unauthorized access to execute commands with elevated privileges on the affected system.
Technical Details of CVE-2020-5757
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability in Grandstream UCM6200 Series firmware versions 1.0.20.23 and below allows authenticated remote attackers to perform OS command injection via HTTP.
Affected Systems and Versions
- Product: Grandstream UCM6200 Series
- Vendor: n/a
- Vulnerable Versions: Versions 1.0.20.23 and below
Exploitation Mechanism
An attacker can exploit this vulnerability by sending a specially crafted HTTP POST request to the UCM's "New" HTTPS API, enabling the execution of arbitrary commands as the root user.
Mitigation and Prevention
Protecting systems from CVE-2020-5757 requires immediate action and long-term security measures.
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Implement network segmentation to restrict access to vulnerable systems.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all software and firmware to prevent known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address potential weaknesses.
- Educate users and administrators about secure practices and the importance of cybersecurity.
Patching and Updates
Ensure that the Grandstream UCM6200 Series firmware is updated to a version that addresses the CVE-2020-5757 vulnerability.