CVE-2020-5738 : Security Advisory and Response

Grandstream GXP1600 series firmware 1.0.4.152 and below is vulnerable to authenticated remote command execution when an attacker uploads a specially crafted tar file to the HTTP /cgi-bin/upload_vpntar interface.

Understanding CVE-2020-5738

This CVE identifies a security vulnerability in the Grandstream GXP1600 Series firmware that allows for authenticated remote command execution.

What is CVE-2020-5738?

The CVE-2020-5738 vulnerability pertains to the Grandstream GXP1600 series firmware versions 1.0.4.152 and below, enabling attackers to execute commands remotely by uploading a malicious tar file.

The Impact of CVE-2020-5738

The vulnerability can lead to unauthorized remote access and potential compromise of the affected system, posing a significant security risk to users and organizations.

Technical Details of CVE-2020-5738

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows authenticated attackers to execute commands remotely by uploading a specially crafted tar file to the HTTP /cgi-bin/upload_vpntar interface.

Affected Systems and Versions

Product: Grandstream GXP1600 Series
Versions affected: 1.0.4.152 and below

Exploitation Mechanism

Attackers exploit the vulnerability by uploading a malicious tar file to the specified interface, enabling them to execute commands remotely.

Mitigation and Prevention

Protecting systems from CVE-2020-5738 requires immediate action and long-term security measures.

Immediate Steps to Take

Update the firmware to a secure version that addresses the vulnerability.
Restrict access to the /cgi-bin/upload_vpntar interface to authorized users only.

Long-Term Security Practices

Regularly monitor and audit system logs for any suspicious activities.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Apply patches and updates provided by Grandstream to fix the vulnerability and enhance system security.