CVE-2023-39747 : Vulnerability Insights and Analysis

A buffer overflow vulnerability was discovered in TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 routers, posing a security risk through the radiusSecret parameter.

Understanding CVE-2023-39747

This section will delve into the details of the CVE-2023-39747 vulnerability and its impact.

What is CVE-2023-39747?

CVE-2023-39747 is a buffer overflow vulnerability found in TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 routers, specifically through the radiusSecret parameter at /userRpm/WlanSecurityRpm.

The Impact of CVE-2023-39747

This vulnerability can be exploited by attackers to execute arbitrary code or trigger a denial of service (DoS) condition, potentially compromising the security of the affected devices.

Technical Details of CVE-2023-39747

In this section, we will explore the technical aspects of the CVE-2023-39747 vulnerability.

Vulnerability Description

The buffer overflow vulnerability in TP-Link routers allows malicious actors to overwrite the memory beyond the allocated buffer, leading to unauthorized code execution.

Affected Systems and Versions

TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 routers are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted input to the radiusSecret parameter, causing a stack-based buffer overflow.

Mitigation and Prevention

This section will provide insights into how organizations and users can mitigate the risks posed by CVE-2023-39747.

Immediate Steps to Take

Disable remote access to the routers unless absolutely necessary.
Implement firewall rules to restrict access to the vulnerable services.
Regularly monitor network traffic for any suspicious activities.

Long-Term Security Practices

Keep the firmware of the routers up to date to patch known vulnerabilities.
Implement strong password policies and multi-factor authentication for router access.
Conduct regular security audits and penetration testing on network devices.

Patching and Updates

Refer to the vendor's security advisories and apply any patches or updates provided to address the CVE-2023-39747 vulnerability.