CVE-2021-46319 : Exploit Details and Defense Strategies

A Remote Code Execution (RCE) vulnerability exists in D-Link Router DIR-846, allowing malicious users to execute arbitrary commands by exploiting specific parameters.

Understanding CVE-2021-46319

This CVE discloses a critical RCE vulnerability in D-Link Router DIR-846.

What is CVE-2021-46319?

The vulnerability enables attackers to execute unauthorized commands using certain parameters, facilitating remote code execution.

The Impact of CVE-2021-46319

The vulnerability allows threat actors to run arbitrary commands, posing a severe risk of unauthorized control and potential exploitation of sensitive data.

Technical Details of CVE-2021-46319

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw resides in the DIR-846 router firmware, enabling attackers to bypass shell metacharacters in specific parameters, ultimately executing arbitrary commands.

Affected Systems and Versions

D-Link Router DIR-846 DIR846A1_FW100A43.bin
D-Link Router DIR846enFW100A53DLA-Retail.bin

Exploitation Mechanism

Attackers can leverage the vulnerability by utilizing backslashes or backticks to bypass shell metacharacters in the ssid0 or ssid1 parameters.

Mitigation and Prevention

Protecting systems from CVE-2021-46319 is crucial to ensure data security.

Immediate Steps to Take

Update the router firmware to the latest version from the official D-Link website
Implement strong access controls and firewall rules to restrict unauthorized access
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly monitor and audit router configurations for any unauthorized changes
Conduct security training for employees to recognize and report suspicious activities

Patching and Updates

Stay informed about security bulletins and updates from D-Link
Install patches promptly to address identified vulnerabilities