CVE-2020-5636 Explained : Impact and Mitigation

Aterm SA3500G firmware versions prior to Ver. 3.5.9 allows an attacker with administrative privilege to execute arbitrary commands through a specially crafted request.

Understanding CVE-2020-5636

This CVE involves an OS Command Injection vulnerability in the Aterm SA3500G firmware.

What is CVE-2020-5636?

CVE-2020-5636 is a security vulnerability in NEC Corporation's Aterm SA3500G firmware versions prior to Ver. 3.5.9, enabling attackers to execute arbitrary commands by manipulating a specific URL.

The Impact of CVE-2020-5636

The vulnerability allows attackers with administrative privileges to exploit the system, potentially leading to unauthorized command execution.

Technical Details of CVE-2020-5636

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Aterm SA3500G firmware versions prior to Ver. 3.5.9 permits attackers to execute arbitrary commands by sending a crafted request to a specific URL.

Affected Systems and Versions

Product: Aterm SA3500G
Vendor: NEC Corporation
Affected Version: Firmware versions prior to Ver. 3.5.9

Exploitation Mechanism

Attackers with administrative privileges can exploit the vulnerability by sending a specially crafted request to a specific URL, triggering arbitrary command execution.

Mitigation and Prevention

Protecting systems from CVE-2020-5636 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update the Aterm SA3500G firmware to version 3.5.9 or later.
Restrict access to administrative privileges to minimize the attack surface.

Long-Term Security Practices

Regularly monitor and audit network traffic for suspicious activities.
Implement strong access controls and authentication mechanisms.

Patching and Updates

Apply security patches and updates provided by NEC Corporation to address the vulnerability and enhance system security.