CVE-2021-45994 : Exploit Details and Defense Strategies
Discover the CVE-2021-45994 vulnerability in Tenda routers G1 and G3 v15.11.0.17(9502)_CN, allowing attackers to perform a Denial of Service attack. Learn how to mitigate this issue.
Tenda routers G1 and G3 v15.11.0.17(9502)_CN were discovered to contain a stack overflow vulnerability that can lead to a Denial of Service attack.
Understanding CVE-2021-45994
What is CVE-2021-45994?
CVE-2021-45994 is a vulnerability found in Tenda routers G1 and G3 v15.11.0.17(9502)_CN, allowing attackers to trigger a Denial of Service (DoS) through a specific parameter.
The Impact of CVE-2021-45994
This vulnerability enables malicious actors to disrupt the normal operation of affected Tenda routers, potentially causing network outages and service unavailability.
Technical Details of CVE-2021-45994
Vulnerability Description
The stack overflow vulnerability exists in the 'formDelDhcpRule' function of Tenda routers G1 and G3 v15.11.0.17(9502)_CN.
Affected Systems and Versions
- Product: Tenda routers G1 and G3
- Version: v15.11.0.17(9502)_CN
Exploitation Mechanism
Attackers exploit the vulnerability by manipulating the 'delDhcpIndex' parameter, triggering a stack overflow and leading to a Denial of Service condition.
Mitigation and Prevention
Immediate Steps to Take
- Disable remote management access if not required
- Apply firmware updates from the official Tenda website
Long-Term Security Practices
- Regularly monitor for firmware updates and apply them promptly
- Implement network segmentation to minimize the impact of potential attacks
Patching and Updates
Ensure timely installation of security patches and firmware updates provided by Tenda to mitigate the CVE-2021-45994 vulnerability.