CVE-2021-45997 : Vulnerability Insights and Analysis
Learn about CVE-2021-45997, a stack overflow vulnerability in Tenda routers G1 and G3, enabling attackers to execute Denial of Service attacks. Find mitigation steps and system updates here.
Tenda routers G1 and G3 v15.11.0.17(9502)_CN were found to have a stack overflow vulnerability in the formSetPortMapping function, potentially leading to a Denial of Service (DoS) attack.
Understanding CVE-2021-45997
What is CVE-2021-45997?
The CVE-2021-45997 vulnerability involves a stack overflow in Tenda routers G1 and G3, allowing attackers to exploit specific parameters and initiate a DoS attack.
The Impact of CVE-2021-45997
This vulnerability poses a risk of causing a Denial of Service condition on affected Tenda routers, potentially disrupting network services and availability.
Technical Details of CVE-2021-45997
Vulnerability Description
The vulnerability arises from a stack overflow in the formSetPortMapping function of Tenda routers G1 and G3, affecting specific parameters.
Affected Systems and Versions
- Product: Tenda routers G1 and G3
- Version: v15.11.0.17(9502)_CN
Exploitation Mechanism
Attackers can exploit the vulnerability by manipulating parameters such as portMappingServer, portMappingProtocol, portMappingWan, portMappingInternal, and portMappingExternal to trigger the stack overflow.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by Tenda promptly.
- Implement network security best practices to mitigate the risk of unauthorized access.
Long-Term Security Practices
- Regularly update router firmware to address known vulnerabilities.
- Conduct security assessments and audits to identify and remediate potential risks.
Patching and Updates
- Monitor Tenda's official channels for security updates and apply patches as soon as they are released.