CVE-2020-35559:Unused function in MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 through 2.6.2 allows authenticated attackers to exhaust all available IP addresses.

splash
Back

Description Preview

A vulnerability has been identified in MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 through version 2.6.2. The issue involves an unused function that can be exploited by authenticated attackers to consume all available IP addresses associated with an account. When exploited, this vulnerability prevents the creation of new devices and users, effectively causing a denial of service condition for account management. This vulnerability is classified as CWE-400 (Uncontrolled Resource Consumption).

Overview

The vulnerability affects MB CONNECT LINE's mymbCONNECT24 and mbCONNECT24 platforms up to and including version 2.6.2. These platforms are industrial connectivity solutions used for remote maintenance and data collection in industrial environments. The issue stems from an unused function that lacks proper resource allocation controls, allowing an authenticated attacker to exhaust all available IP addresses in an account. This resource exhaustion attack prevents legitimate administrators from creating new devices or user accounts, disrupting normal operations and management capabilities. The attack requires authentication, which limits the attack surface but still poses a significant risk to system administrators and organizations using these platforms.

Remediation

Organizations using MB CONNECT LINE mymbCONNECT24 or mbCONNECT24 should:

  1. Update to the latest version beyond 2.6.2 as provided by the vendor
  2. Monitor account activity for unusual IP address allocation
  3. Implement strict access controls to limit who can authenticate to the system
  4. Consider implementing IP address allocation quotas if available
  5. Contact MB CONNECT LINE support for specific patch information if direct updates are not possible
  6. Review the vendor's security advisory at https://mbconnectline.com/security-advice/ for additional guidance

References

  1. VDE CERT Advisory: https://cert.vde.com/de-de/advisories/vde-2021-003
  2. Vendor Security Advisory: https://mbconnectline.com/security-advice/
  3. CWE-400: Uncontrolled Resource Consumption - https://cwe.mitre.org/data/definitions/400.html

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.

Let's talk!

background
Armis Vulnerability Intelligence Database