CVE-2018-18732 : Vulnerability Insights and Analysis
Discover the buffer overflow vulnerability in Tenda routers with CVE-2018-18732. Learn about the impact, affected systems, exploitation risks, and mitigation steps to secure your devices.
A vulnerability has been found on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices where the router's web server is affected by a buffer overflow issue.
Understanding CVE-2018-18732
This CVE identifies a buffer overflow vulnerability in Tenda routers.
What is CVE-2018-18732?
The vulnerability affects Tenda routers due to a buffer overflow issue in the router's web server, httpd, when processing a post request with the 'ntpServer' parameter.
The Impact of CVE-2018-18732
The buffer overflow vulnerability allows attackers to overwrite the return address of the function, potentially leading to remote code execution or denial of service.
Technical Details of CVE-2018-18732
This section provides technical details of the vulnerability.
Vulnerability Description
The 'ntpServer' parameter in Tenda routers is directly used in a strcpy function to a local variable on the stack, causing a buffer overflow and overwriting the return address of the function.
Affected Systems and Versions
- Tenda AC7 V15.03.06.44_CN
- Tenda AC9 V15.03.05.19(6318)_CN
- Tenda AC10 V15.03.06.23_CN
- Tenda AC15 V15.03.05.19_CN
- Tenda AC18 V15.03.05.19(6318)_CN
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a crafted post request with a malicious 'ntpServer' parameter, triggering the buffer overflow and potentially gaining control over the affected device.
Mitigation and Prevention
Protecting systems from CVE-2018-18732 is crucial to prevent exploitation.
Immediate Steps to Take
- Disable remote management if not required
- Implement strong firewall rules to restrict access
- Regularly monitor network traffic for suspicious activities
Long-Term Security Practices
- Keep router firmware up to date
- Conduct regular security audits and penetration testing
- Educate users on safe browsing habits and phishing awareness
Patching and Updates
Apply patches and updates provided by Tenda to address the buffer overflow vulnerability in the affected router models.