CVE-2021-20159 : Exploit Details and Defense Strategies

This article provides insights into CVE-2021-20159, a vulnerability impacting Trendnet AC2600 TEW-827DRU version 2.08B01, leading to command injection.

Understanding CVE-2021-20159

This section delves into the nature of the CVE-2021-20159 vulnerability affecting the Trendnet AC2600 TEW-827DRU router.

What is CVE-2021-20159?

The CVE-2021-20159 vulnerability involves command injection in the Trendnet AC2600 TEW-827DRU router's system log functionality, enabling malicious actors to execute commands with root privileges by providing a specially crafted parameter.

The Impact of CVE-2021-20159

With this vulnerability, threat actors can exploit the system log feature to inject malicious commands, potentially leading to unauthorized access, data theft, and further compromise of the affected device.

Technical Details of CVE-2021-20159

This section covers specific technical details related to CVE-2021-20159.

Vulnerability Description

The vulnerability in Trendnet AC2600 TEW-827DRU version 2.08B01 allows attackers to execute arbitrary commands as root through a malformed parameter in the system log feature.

Affected Systems and Versions

The impacted system includes the Trendnet AC2600 TEW-827DRU router running version 2.08B01.

Exploitation Mechanism

By exploiting the command injection flaw in the system log functionality, threat actors can gain unauthorized access and potentially compromise the router.

Mitigation and Prevention

To address and prevent exploitation of CVE-2021-20159, the following steps are recommended.

Immediate Steps to Take

Update the router firmware to the latest non-vulnerable version.
Restrict access to the router's system log functionality.

Long-Term Security Practices

Regularly monitor for security advisories and updates from the vendor.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Ensure timely application of security patches and firmware updates to mitigate known vulnerabilities and enhance the overall security posture.