CVE-2021-23886:Denial of Service vulnerability in McAfee Data Loss Prevention (DLP) Endpoint for Windows allows local attackers to cause a Blue Screen of Death (BSoD).

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CVE-2021-23886 is a Denial of Service vulnerability affecting McAfee Data Loss Prevention (DLP) Endpoint for Windows versions prior to 11.6.100. The vulnerability allows a local attacker with low privileges to cause a Blue Screen of Death (BSoD) by suspending a process, modifying the process memory, and then restarting it. The issue occurs because the hdlphook driver reads invalid memory during this manipulation, which triggers the system crash. This vulnerability is classified as CWE-755, which relates to improper handling of exceptional conditions.

Overview

This vulnerability affects McAfee Data Loss Prevention (DLP) Endpoint for Windows prior to version 11.6.100. The vulnerability allows a local attacker with low privileges to cause a system crash (BSoD) by manipulating process memory that is monitored by the DLP software. The hdlphook driver, which is a component of the McAfee DLP solution, attempts to read memory that has been invalidated through the attacker's actions, resulting in a system crash. This type of attack requires local access to the system but only low privileges to execute, making it a potential concern for organizations using affected versions of the software.

Remediation

To mitigate this vulnerability, organizations should:

  1. Update McAfee Data Loss Prevention (DLP) Endpoint for Windows to version 11.6.100 or later.
  2. Apply any security patches provided by McAfee/Trellix for this specific vulnerability.
  3. Monitor systems for unusual behavior or unexpected system crashes that could indicate exploitation attempts.
  4. Implement the principle of least privilege to restrict local user permissions where possible.
  5. Consider implementing additional endpoint protection measures to prevent unauthorized process manipulation.

References

  1. McAfee Security Bulletin SB10354 (Note: Link may be broken, check Trellix/McAfee support portal for updated information)
  2. McAfee Security Bulletin SB10357 (Note: Link may be broken, check Trellix/McAfee support portal for updated information)
  3. CWE-755: Improper Handling of Exceptional Conditions
  4. Trellix (formerly McAfee) Knowledge Center for updated security bulletins

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