XSS Payload:
<style onload=alert`7HacX`;>../..%2f
Description:
The TP-Link Archer A20 v3 router is vulnerable to Cross-site Scripting (XSS) due to improper handling of directory listing paths in the web interface. When a specially crafted URL is visited, the router’s web page renders the directory listing and executes arbitrary JavaScript embedded in the URL. This allows the attacker to inject malicious code into the page, executing JavaScript on the victim’s browser, which could then be used for further malicious actions. The vulnerability was identified in the 1.0.6 Build 20231011 rel.85717(5553) version.
Reference:
https://lnkd.in/gb3tP9Fd
Practice Commands and Codes:
1. Crafting XSS Payload:
<style onload=alert(`XSS`);>../..%2f
2. Testing XSS Vulnerability:
Use tools like Burp Suite or OWASP ZAP to test for XSS vulnerabilities.
zap-cli quick-scan --spider -r http://target-url
3. Exploiting Directory Traversal:
curl -v "http://target-url/../../%2f"
4. Mitigation Steps:
- Update the router firmware to the latest version.
- Sanitize user inputs on the web interface.
- Implement Content Security Policy (CSP) headers.
echo "Content-Security-Policy: default-src 'self'; script-src 'self';" >> /etc/nginx/nginx.conf
What Undercode Say:
Cross-site scripting (XSS) vulnerabilities remain a critical threat in web applications and devices like routers. The TP-Link Archer A20 v3 router’s XSS vulnerability highlights the importance of proper input validation and output encoding. To mitigate such risks, always sanitize user inputs and implement robust security headers like Content Security Policy (CSP). Regularly update firmware and conduct penetration testing using tools like Burp Suite, OWASP ZAP, or Nmap. For Linux users, commands like curl, grep, and `awk` can be used to automate vulnerability scanning. Windows users can leverage PowerShell scripts to test and secure their systems. Always stay updated with the latest CVEs and bug bounty programs to identify and report vulnerabilities responsibly.
Additional Resources:
- OWASP XSS Prevention Cheat Sheet
- Burp Suite Documentation
- Nmap Scripting Engine (NSE) for XSS Detection
Stay vigilant and keep your systems secure!
References:
Hackers Feeds, Undercode AI
