CVE-2022-29642 : Vulnerability Insights and Analysis
Discover how TOTOLINK A3100R routers are prone to a stack overflow vulnerability, allowing attackers to trigger a Denial of Service (DoS) attack. Learn about the impact, technical details, and mitigation steps.
This CVE involves TOTOLINK A3100R routers that were found to have a vulnerability leading to a Denial of Service (DoS) due to a stack overflow via the url parameter in the setUrlFilterRules function.
Understanding CVE-2022-29642
This section will cover the details of the CVE-2022-29642 vulnerability found in TOTOLINK A3100R routers.
What is CVE-2022-29642?
TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 were discovered to contain a stack overflow via the url parameter in the function setUrlFilterRules. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted POST request.
The Impact of CVE-2022-29642
The vulnerability could enable malicious actors to launch DoS attacks, disrupting the normal operation of affected TOTOLINK A3100R routers.
Technical Details of CVE-2022-29642
In this section, we will delve into the technical aspects of the CVE-2022-29642 vulnerability.
Vulnerability Description
The vulnerability lies in the handling of the url parameter in the setUrlFilterRules function, leading to a stack overflow and subsequent DoS condition.
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
Attackers can exploit this vulnerability by sending a specially crafted POST request containing malicious data to trigger the stack overflow and execute a DoS attack.
Mitigation and Prevention
To address CVE-2022-29642, users and administrators should take immediate steps to mitigate the risk and prevent potential exploitation.
Immediate Steps to Take
- Update the router firmware to the latest version provided by TOTOLINK.
- Implement network-level protections to filter out potentially malicious requests.
Long-Term Security Practices
- Regularly monitor for security advisories related to TOTOLINK A3100R routers.
- Conduct security assessments and audits periodically to identify vulnerabilities proactively.
Patching and Updates
Stay informed about security patches released by TOTOLINK and apply them promptly to ensure the mitigation of known vulnerabilities in the router firmware.