CVE-2022-29643 : Security Advisory and Response

This article provides detailed information about CVE-2022-29643, a vulnerability affecting TOTOLINK A3100R routers.

Understanding CVE-2022-29643

This CVE refers to a stack overflow vulnerability in TOTOLINK A3100R routers, allowing attackers to trigger a Denial of Service (DoS) attack through a specially crafted POST request.

What is CVE-2022-29643?

TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 routers are susceptible to a stack overflow via the macAddress parameter in the setMacQos function.

The Impact of CVE-2022-29643

Exploitation of this vulnerability could result in a Denial of Service (DoS) condition, potentially disrupting network availability for legitimate users.

Technical Details of CVE-2022-29643

Let's delve into the technical aspects of this vulnerability.

Vulnerability Description

The flaw allows malicious actors to input crafted data via the macAddress parameter, leading to a stack overflow condition within the setMacQos function of the affected routers.

Affected Systems and Versions

TOTOLINK A3100R routers with versions V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 are impacted by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a specially designed POST request containing malicious data to the targeted router, triggering the stack overflow.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2022-29643 is crucial.

Immediate Steps to Take

Consider updating the firmware of affected TOTOLINK A3100R routers to patched versions that address the stack overflow vulnerability.
Implement network-level protection mechanisms to filter out potentially harmful POST requests.

Long-Term Security Practices

Regularly monitor for security advisories from TOTOLINK and apply patches promptly to prevent vulnerabilities.
Conduct regular security audits and penetration testing to identify and address any potential weaknesses in your network infrastructure.

Patching and Updates

Stay informed of firmware updates released by TOTOLINK for the A3100R routers and ensure timely installation to mitigate the risk of exploitation.