CVE-2020-36109 : Exploit Details and Defense Strategies

ASUS RT-AX86U router firmware below version under 9.0.0.4_386 has a buffer overflow vulnerability that can lead to code execution.

Understanding CVE-2020-36109

This CVE involves a specific vulnerability in the ASUS RT-AX86U router firmware.

What is CVE-2020-36109?

The vulnerability exists in the blocking_request.cgi function of the httpd module, allowing attackers to execute malicious code.

The Impact of CVE-2020-36109

The vulnerability can be exploited by attackers to execute arbitrary code on affected devices, potentially leading to unauthorized access or control.

Technical Details of CVE-2020-36109

This section covers the technical aspects of the CVE.

Vulnerability Description

A buffer overflow in the blocking_request.cgi function of the httpd module in ASUS RT-AX86U router firmware versions below 9.0.0.4_386.

Affected Systems and Versions

Product: ASUS RT-AX86U router
Firmware versions below 9.0.0.4_386

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting and sending malicious data to the affected router, triggering the buffer overflow and potentially executing arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2020-36109 is crucial to prevent exploitation and unauthorized access.

Immediate Steps to Take

Update the ASUS RT-AX86U router firmware to version 9.0.0.4_386 or higher.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor for firmware updates and security advisories from ASUS.
Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches and updates provided by ASUS promptly to address known vulnerabilities and enhance system security.