CVE-2022-29640 : What You Need to Know
Learn about CVE-2022-29640, a stack overflow flaw in TOTOLINK A3100R routers allowing DoS attacks. Find mitigation steps and prevention measures here.
This article discusses CVE-2022-29640, a vulnerability found in TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 routers that allows attackers to conduct a Denial of Service (DoS) attack.
Understanding CVE-2022-29640
This section explains the nature of CVE-2022-29640 and its impact on vulnerable systems.
What is CVE-2022-29640?
CVE-2022-29640 is a stack overflow vulnerability in TOTOLINK A3100R routers which can be exploited through a crafted POST request using the comment parameter in the setPortForwardRules function.
The Impact of CVE-2022-29640
The vulnerability in TOTOLINK A3100R routers can be abused by malicious actors to trigger a Denial of Service (DoS) condition, disrupting network availability.
Technical Details of CVE-2022-29640
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The stack overflow vulnerability is due to improper input validation in the router's setPortForwardRules function, enabling attackers to crash the device with a specially-crafted POST request.
Affected Systems and Versions
TOTOLINK A3100R V4.1.2cu.5050_B20200504 and V4.1.2cu.5247_B20211129 are confirmed to be impacted by this vulnerability.
Exploitation Mechanism
Cybercriminals can exploit the CVE-2022-29640 flaw by sending a malicious POST request with a specifically manipulated comment parameter to the setPortForwardRules function.
Mitigation and Prevention
To protect systems from CVE-2022-29640, immediate action and long-term security practices are essential.
Immediate Steps to Take
It is recommended to apply security patches, utilize intrusion detection systems, and monitor network traffic for signs of exploitation.
Long-Term Security Practices
Implement strong firewall rules, keep firmware up to date, and conduct regular security audits to identify and address vulnerabilities.
Patching and Updates
Users should regularly check for firmware updates from TOTOLINK and apply them promptly to mitigate the risk of exploitation.