CVE-2021-31758 : Security Advisory and Response
Learn about CVE-2021-31758, a stack buffer overflow flaw in Tenda AC11 devices, enabling remote code execution. Find out the impact, affected systems, and mitigation steps.
A stack buffer overflow vulnerability has been discovered in Tenda AC11 devices with firmware through 02.03.01.104_CN, allowing attackers to execute arbitrary code via a crafted post request.
Understanding CVE-2021-31758
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-31758.
What is CVE-2021-31758?
CVE-2021-31758 is a stack buffer overflow vulnerability found in Tenda AC11 devices, enabling remote attackers to run arbitrary code on the system through a specifically crafted post request.
The Impact of CVE-2021-31758
The vulnerability poses a significant threat as attackers can exploit it to execute malicious code, potentially leading to unauthorized access, data theft, or system compromise.
Technical Details of CVE-2021-31758
This section delves into the specific technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises due to a stack buffer overflow issue in the /goform/setportList function of Tenda AC11 devices, allowing threat actors to execute arbitrary code by sending a tailored post request.
Affected Systems and Versions
Tenda AC11 devices with firmware versions up to and including 02.03.01.104_CN are impacted by this vulnerability.
Exploitation Mechanism
To exploit CVE-2021-31758, attackers can send a maliciously crafted post request to the /goform/setportList function, triggering a stack buffer overflow and gaining unauthorized code execution capabilities.
Mitigation and Prevention
This section outlines the steps to mitigate the risks associated with CVE-2021-31758.
Immediate Steps to Take
Users are advised to update their Tenda AC11 device firmware to a non-vulnerable version and monitor for any signs of unauthorized access or unusual activities on the network.
Long-Term Security Practices
Implementing strong network segmentation, regularly updating firmware, and conducting security audits can mitigate the risk of such vulnerabilities in the long term.
Patching and Updates
Tenda has likely released a security patch addressing the CVE-2021-31758 vulnerability. Users should promptly apply the latest firmware updates provided by the vendor to safeguard their devices against potential exploitation.