CVE-2021-31641 Explained : Impact and Mitigation
Learn about CVE-2021-31641, an unauthenticated XSS vulnerability in CHIYU IoT devices. Understand its impact, affected versions, exploitation, and mitigation steps.
An unauthenticated XSS vulnerability exists in several IoT devices from CHIYU Technology due to a lack of sanitization when the HTTP 404 message is generated.
Understanding CVE-2021-31641
This CVE highlights a critical XSS vulnerability present in multiple IoT devices manufactured by CHIYU Technology.
What is CVE-2021-31641?
CVE-2021-31641 is an unauthenticated Cross-Site Scripting (XSS) vulnerability found in various CHIYU Technology IoT devices.
The Impact of CVE-2021-31641
The vulnerability could be exploited by remote attackers to inject malicious scripts into web pages viewed by unsuspecting users, potentially leading to account takeover or unauthorized access to sensitive information.
Technical Details of CVE-2021-31641
The technical details of CVE-2021-31641 are as follows:
Vulnerability Description
The flaw arises due to the absence of proper input sanitization when the devices generate HTTP 404 messages, allowing attackers to inject and execute arbitrary code.
Affected Systems and Versions
The vulnerability affects several CHIYU IoT devices including BF-630, BF-450M, BF-430, BF-431, BF631-W, BF830-W, Webpass, BF-MINI-W, and SEMAC.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by crafting and sending specially crafted requests to the affected devices, thereby executing malicious scripts in the context of the user's web browser.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-31641, consider the following steps:
Immediate Steps to Take
- Disable remote access to the affected devices if not required.
- Regularly monitor for unusual activities on the network that may indicate an exploitation attempt.
Long-Term Security Practices
- Implement regular security assessments and penetration testing to identify and address vulnerabilities promptly.
- Educate users about safe browsing practices to minimize the risk of XSS attacks.
Patching and Updates
Contact CHIYU Technology for firmware updates and patches that address the XSS vulnerability in the affected devices.