CVE-2023-7219 : Exploit Details and Defense Strategies

This article provides insight into CVE-2023-7219, a critical vulnerability found in Totolink N350RT 9.3.5u.6139_B202012, impacting the loginAuth function of the file /cgi-bin/cstecgi.cgi due to a stack-based buffer overflow.

Understanding CVE-2023-7219

The vulnerability identified as CVE-2023-7219 affects Totolink N350RT 9.3.5u.6139_B202012 by allowing a remote attacker to exploit the loginAuth function of the file /cgi-bin/cstecgi.cgi, leading to a stack-based buffer overflow.

What is CVE-2023-7219?

CVE-2023-7219 is classified as a critical vulnerability in Totolink N350RT 9.3.5u.6139_B202012. The issue arises from the manipulation of the argument http_host, enabling a stack-based buffer overflow attack that can be executed remotely.

The Impact of CVE-2023-7219

The exploitation of CVE-2023-7219 could result in unauthorized access, the execution of arbitrary code, or the compromise of sensitive information on the affected system. Due to the critical nature of this vulnerability, it poses a significant risk to the security and integrity of the device and potentially the entire network.

Technical Details of CVE-2023-7219

CVE-2023-7219 has been assigned a CVSSv3 Base Score of 7.2, indicating a high severity level. The vulnerability's vector includes network access, high confidentiality impact, high integrity impact, and high availability impact.

Vulnerability Description

The vulnerability arises in the function loginAuth of the file /cgi-bin/cstecgi.cgi in Totolink N350RT 9.3.5u.6139_B202012 due to a stack-based buffer overflow triggered by the manipulation of the argument http_host.

Affected Systems and Versions

The vulnerability impacts Totolink N350RT version 9.3.5u.6139_B202012.

Exploitation Mechanism

Remote attackers can exploit CVE-2023-7219 through unauthorized manipulation of the argument http_host, triggering a stack-based buffer overflow that can lead to serious security breaches.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-7219, immediate actions must be taken to secure the affected systems and prevent potential exploitation.

Immediate Steps to Take

Contact the vendor for patches or security updates addressing the vulnerability.
Implement network segmentation to limit the exposure of affected systems.
Monitor network traffic for any suspicious activity that may indicate an ongoing exploit attempt.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses proactively.
Educate users and administrators about cybersecurity best practices to enhance overall security posture.

Patching and Updates

Stay informed about security advisories released by Totolink regarding CVE-2023-7219 and promptly apply any patches or updates provided to secure the vulnerable systems.