CVE-2020-5635 : What You Need to Know

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

Understanding CVE-2020-5635

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

What is CVE-2020-5635?

CVE-2020-5635 is a security vulnerability in NEC Corporation's Aterm SA3500G firmware versions prior to Ver. 3.5.9. It enables an attacker on the adjacent network to send a specific URL request, potentially leading to arbitrary command execution.

The Impact of CVE-2020-5635

The vulnerability allows unauthorized individuals to execute commands on affected devices, posing a significant security risk to the network and data.

Technical Details of CVE-2020-5635

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in Aterm SA3500G firmware versions prior to Ver. 3.5.9 permits attackers on the adjacent network to execute arbitrary commands by sending a specially 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 exploit this vulnerability by sending a malicious request to a specific URL, triggering the execution of unauthorized commands on the device.

Mitigation and Prevention

Protecting systems from CVE-2020-5635 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Aterm SA3500G firmware to version 3.5.9 or later to mitigate 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 to address known vulnerabilities.
Conduct security audits and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security advisories from NEC Corporation and apply patches promptly to secure the Aterm SA3500G devices.