CVE-2020-22661:Vulnerability in Ruckus wireless devices allows attackers to replace the backup secondary official firmware image with an unauthorized image.

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A security vulnerability exists in multiple Ruckus wireless access points and controllers that allows attackers to erase the backup secondary official firmware image and replace it with an unauthorized image. This affects various models including R310, R500, R600, T300 series access points, and multiple controller platforms such as SmartCell Gateway, SmartZone, and ZoneDirector series. The vulnerability could potentially allow an attacker to install malicious firmware that would persist even after primary firmware updates.

Overview

This vulnerability affects multiple Ruckus wireless infrastructure products running specific firmware versions. The issue allows attackers to manipulate the secondary backup firmware image, which could lead to persistent unauthorized access or control of the affected devices. Since many network devices use a dual-firmware architecture for failsafe updates, compromising the secondary image could create a persistent backdoor that survives normal firmware update procedures. Affected devices include various access point models (R310, R500, R600, T300 series) and controller platforms (SmartCell Gateway, SmartZone, ZoneDirector) running vulnerable firmware versions.

Remediation

Ruckus Networks has released patched firmware versions to address this vulnerability. Users should upgrade to the following versions or newer:

  • For SmartCell Gateway 200 (SCG200): Version 3.6.2.0.795 or later
  • For SmartZone 100 (SZ-100): Version 3.6.2.0.795 or later
  • For SmartZone 300 (SZ300): Version 3.6.2.0.795 or later
  • For Virtual SmartZone (vSZ): Version 3.6.2.0.795 or later
  • For ZoneDirector series and access points: Check the Ruckus security bulletin for specific version recommendations

Additionally, organizations should:

  1. Verify firmware integrity after updates
  2. Implement proper network segmentation to limit access to management interfaces
  3. Use strong authentication for administrative access
  4. Monitor devices for unexpected firmware changes or behavior

References

  1. Ruckus Security Bulletin: https://support.ruckuswireless.com/security_bulletins/302
  2. Vulnerability Analysis Blog Post: https://hdhrmi.blogspot.com/2020/03/multiple-vulnerabilities-in-ruckus.html?m=1
  3. MITRE CVE Entry: CVE-2020-22661

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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Armis Vulnerability Intelligence Database