CVE-2023-7213 : Security Advisory and Response

This CVE-2023-7213 was published on January 7, 2024, and affects Totolink N350RT with version 9.3.5u.6139_B20201216. The vulnerability is classified as a critical stack-based buffer overflow in the HTTP POST Request Handler component.

Understanding CVE-2023-7213

This vulnerability in Totolink N350RT poses a significant security risk due to the stack-based buffer overflow in the HTTP POST Request Handler component, potentially allowing remote attackers to exploit the system.

What is CVE-2023-7213?

The vulnerability in Totolink N350RT version 9.3.5u.6139_B20201216 lies in the manipulation of the argument v33, leading to a stack-based buffer overflow in the main function of the /cgi-bin/cstecgi.cgi file. This can be exploited remotely, making it critical for system security.

The Impact of CVE-2023-7213

With a CVSS base score of 6.3 (Medium), this vulnerability can allow attackers to execute arbitrary code, disrupt system integrity, and compromise sensitive information, posing a serious threat to affected systems.

Technical Details of CVE-2023-7213

The following technical details shed light on the nature and scope of CVE-2023-7213:

Vulnerability Description

The vulnerability arises from a stack-based buffer overflow in Totolink N350RT 9.3.5u.6139_B20201216, specifically in the main function of the /cgi-bin/cstecgi.cgi file related to the HTTP POST Request Handler component.

Affected Systems and Versions

Vendor: Totolink
Product: N350RT
Affected Version: 9.3.5u.6139_B20201216
Component: HTTP POST Request Handler
Vulnerability Type: Stack-based Buffer Overflow

Exploitation Mechanism

Exploiting this vulnerability involves manipulating the argument v33, allowing attackers to trigger a stack-based buffer overflow remotely. The exploit has been publicly disclosed and poses a serious threat to system security.

Mitigation and Prevention

To safeguard against CVE-2023-7213, consider the following mitigation strategies:

Immediate Steps to Take

Update the Totolink N350RT version to a secure, patched release.
Implement network-level controls to restrict unauthorized access to vulnerable components.

Long-Term Security Practices

Regularly monitor vendor security advisories for patches and updates.
Conduct routine security audits and penetration testing to identify vulnerabilities proactively.

Patching and Updates

Prioritize the timely installation of security patches released by Totolink to address the stack-based buffer overflow vulnerability in N350RT. Regularly check for updates and apply them to enhance system security and resilience against potential exploits.