CVE-2023-7220 : What You Need to Know

A critical vulnerability has been discovered in Totolink NR1800X version 9.1.0u.6279_B20210910, affecting the function loginAuth in the file /cgi-bin/cstecgi.cgi. This vulnerability has been classified as a stack-based buffer overflow issue with a base severity of CRITICAL.

Understanding CVE-2023-7220

This section provides insights into the nature of the CVE-2023-7220 vulnerability and its impact on affected systems.

What is CVE-2023-7220?

The vulnerability in Totolink NR1800X allows for remote attackers to execute a stack-based buffer overflow through the manipulation of the password argument in the loginAuth function of the cstecgi.cgi file. The exploit has been publicly disclosed, and the identifier VDB-249854 has been assigned to this vulnerability.

The Impact of CVE-2023-7220

With a base severity score of 9.8 (CRITICAL), this vulnerability poses a significant risk to affected systems. Attackers can potentially exploit this issue remotely, leading to unauthorized access, data manipulation, and potentially full system compromise.

Technical Details of CVE-2023-7220

Delving into the technical aspects of the CVE-2023-7220 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises due to a stack-based buffer overflow in the loginAuth function of the cstecgi.cgi file in Totolink NR1800X version 9.1.0u.6279_B20210910. By manipulating the password argument, attackers can trigger this buffer overflow remotely.

Affected Systems and Versions

The specific version impacted by CVE-2023-7220 is Totolink NR1800X 9.1.0u.6279_B20210910. Systems running this version are vulnerable to the stack-based buffer overflow in the loginAuth function of the cstecgi.cgi file.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by manipulating the password argument in the loginAuth function, triggering a stack-based buffer overflow. This could lead to unauthorized access and potential compromise of the affected systems.

Mitigation and Prevention

Understanding the necessary steps to mitigate the risks posed by CVE-2023-7220 and prevent potential exploitation of the vulnerability.

Immediate Steps to Take

Organizations should apply security patches and updates provided by Totolink promptly.
Implement network security measures to restrict unauthorized access to potentially vulnerable systems.
Monitor network traffic for any suspicious activity that could indicate an exploitation attempt.

Long-Term Security Practices

Regularly update and patch software and firmware to address known vulnerabilities.
Conduct security audits and assessments to identify and remediate potential weaknesses in the system.
Educate users and IT staff about best practices for cybersecurity to enhance overall system security.

Patching and Updates

Users of Totolink NR1800X version 9.1.0u.6279_B20210910 should ensure they have installed the latest security patches and updates provided by the vendor to address the CVE-2023-7220 vulnerability. Regularly checking for and applying patches is essential to maintain the security of the system.