CVE-2022-29638 : Security Advisory and Response
Discover the stack overflow vulnerability (CVE-2022-29638) in TOTOLINK A3100R routers, enabling DoS attacks. Learn about impacts, affected versions, and mitigation steps.
This article provides an overview of CVE-2022-29638, a vulnerability found in TOTOLINK A3100R routers.
Understanding CVE-2022-29638
This CVE identifies a stack overflow vulnerability in TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 routers, exposing them to Denial of Service (DoS) attacks.
What is CVE-2022-29638?
TOTOLINK A3100R routers are affected by a stack overflow in the setIpQosRules function via the comment parameter, enabling attackers to trigger a DoS by sending a specially crafted POST request.
The Impact of CVE-2022-29638
This vulnerability poses a significant risk as attackers can disrupt the normal operation of TOTOLINK A3100R routers, leading to service unavailability for legitimate users.
Technical Details of CVE-2022-29638
Here are the technical specifics related to CVE-2022-29638:
Vulnerability Description
The vulnerability arises due to inadequate input validation in the comment parameter of the setIpQosRules function within TOTOLINK A3100R routers, allowing for a stack overflow.
Affected Systems and Versions
The affected versions include TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 routers.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a specially crafted POST request with a malicious comment parameter to trigger the stack overflow.
Mitigation and Prevention
Taking proactive security measures is essential to mitigate the risks associated with CVE-2022-29638.
Immediate Steps to Take
Users are advised to apply patches or updates provided by TOTOLINK to address this vulnerability and prevent potential DoS attacks.
Long-Term Security Practices
Implementing strong firewall rules and network segmentation can help reduce the attack surface and protect against similar vulnerabilities in the future.
Patching and Updates
Regularly checking for firmware updates from TOTOLINK and promptly applying them to the affected routers is crucial to ensure protection against known vulnerabilities.