CVE-2020-35836:Stored Cross-Site Scripting (XSS) vulnerability in multiple NETGEAR router models

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Multiple NETGEAR router models are affected by a stored Cross-Site Scripting (XSS) vulnerability (CWE-79). The vulnerability allows attackers to inject malicious scripts that can be stored on the affected device and executed when other users access the compromised page. This could lead to cookie theft, credential harvesting, or other client-side attacks. The vulnerability affects D7800, R7500v2, R7800, R8900, R9000, XR500, XR700, and RAX120 models running firmware versions prior to their respective security patches.

Overview

This vulnerability is a stored Cross-Site Scripting (XSS) issue affecting multiple NETGEAR router models. Stored XSS occurs when malicious scripts are injected into a website and permanently stored on the target server, such as in a database, message forum, comment field, or other storage locations. When other users browse to the affected page, the malicious script executes in their browsers in the context of their session.

The vulnerability could allow attackers to:

  • Steal session cookies and impersonate users
  • Capture credentials or other sensitive information
  • Perform actions on behalf of the victim
  • Modify the appearance of the web interface
  • Redirect users to malicious websites

Affected devices include popular NETGEAR router models used in both home and small business environments.

Remediation

NETGEAR has released firmware updates that address this vulnerability. Users of affected devices should update to the following firmware versions or later:

  • D7800: Update to version 1.0.1.56 or later
  • R7500v2: Update to version 1.0.3.46 or later
  • R7800: Update to version 1.0.2.74 or later
  • R8900: Update to version 1.0.4.28 or later
  • R9000: Update to version 1.0.4.28 or later
  • XR500: Update to version 2.3.2.56 or later
  • XR700: Update to version 1.0.1.10 or later
  • RAX120: Update to version 1.0.0.78 or later

To update your router's firmware:

  1. Access your router's web interface by entering its IP address in a browser
  2. Log in with your administrator credentials
  3. Navigate to the firmware or administration section
  4. Check for and install the latest firmware update
  5. Restart your router after the update is complete

Additional security recommendations:

  • Change default administrator credentials
  • Disable remote administration if not needed
  • Implement strong, unique passwords
  • Keep the router firmware regularly updated

References

  1. NETGEAR Security Advisory: https://kb.netgear.com/000062662/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-Routers-PSV-2018-0490
  2. Common Weakness Enumeration: CWE-79 (Cross-site Scripting)
  3. MITRE CVE Entry: CVE-2020-35836

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Accommodation & Food Services
    Accommodation & Food Services
  2. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services
  3. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  4. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  5. Construction
    Construction
  6. Educational Services
    Educational Services
  7. Finance and Insurance
    Finance and Insurance
  8. Health Care & Social Assistance
    Health Care & Social Assistance
  9. Information
    Information
  10. Management of Companies & Enterprises
    Management of Companies & Enterprises
  11. Manufacturing
    Manufacturing
  12. Mining
    Mining
  13. Other Services (except Public Administration)
    Other Services (except Public Administration)
  14. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  15. Public Administration
    Public Administration
  16. Real Estate Rental & Leasing
    Real Estate Rental & Leasing
  17. Retail Trade
    Retail Trade
  18. Transportation & Warehousing
    Transportation & Warehousing
  19. Utilities
    Utilities
  20. Wholesale Trade
    Wholesale Trade

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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