CVE-2020-13390 : What You Need to Know
Discover the buffer overflow vulnerability in Tenda routers with CVE-2020-13390. Learn about the impact, affected systems, exploitation, and mitigation steps.
An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318)_CN devices due to a buffer overflow vulnerability in the router's web server.
Understanding CVE-2020-13390
This CVE identifies a buffer overflow vulnerability in Tenda routers that can lead to arbitrary code execution attacks.
What is CVE-2020-13390?
The vulnerability exists in the router's web server (httpd) when processing specific parameters in a POST request, allowing an attacker to overwrite the return address of a function and execute malicious code.
The Impact of CVE-2020-13390
The exploitation of this vulnerability can result in arbitrary code execution attacks, potentially compromising the security and integrity of the affected devices.
Technical Details of CVE-2020-13390
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- The issue arises from a buffer overflow vulnerability in the router's web server, httpd.
- By manipulating specific parameters in a POST request, an attacker can overwrite the return address of a function.
- This allows the attacker to craft a payload for executing arbitrary code on the device.
Affected Systems and Versions
- Tenda AC6 V1.0 V15.03.05.19_multi_TD01
- Tenda AC9 V1.0 V15.03.05.19(6318)_CN
- Tenda AC9 V3.0 V15.03.06.42_multi
- Tenda AC15 V1.0 V15.03.05.19_multi_TD01
- Tenda AC18 V15.03.05.19(6318_)_CN
Exploitation Mechanism
- The vulnerability is exploited by crafting a specific payload to be used in the POST request, allowing the attacker to execute arbitrary code on the device.
Mitigation and Prevention
Protecting systems from CVE-2020-13390 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Tenda to address the vulnerability.
- Monitor network traffic for any suspicious activities that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update firmware and software to ensure the latest security patches are in place.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories from Tenda and promptly apply any released patches to mitigate the vulnerability.