CVE-2021-2088:MySQL Server DML Component Vulnerability (CVE-2021-2088) allows high-privileged attackers to cause denial of service.

splash
Back

Description Preview

CVE-2021-2088 affects the DML (Data Manipulation Language) component of Oracle MySQL Server versions 8.0.22 and prior. This vulnerability allows attackers with high privileges and local access to the MySQL Server infrastructure to cause a denial of service condition. Successful exploitation can result in system hangs or repeatable crashes, completely disrupting the availability of the MySQL Server. The vulnerability has a CVSS 3.1 Base Score of 4.4, primarily impacting system availability.

Overview

This vulnerability exists in the DML component of MySQL Server versions 8.0.22 and earlier. It can be exploited by attackers who already have high-level privileges and local access to the server infrastructure. The attack vector is considered easily exploitable and results in a complete denial of service through either system hangs or repeatable crashes. The vulnerability does not impact data confidentiality or integrity but has a significant impact on system availability. The CVSS vector (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H) indicates a local attack vector requiring high privileges with no user interaction needed, affecting only the MySQL Server itself with high availability impact.

Remediation

To address this vulnerability, system administrators should:

  1. Update MySQL Server to version 8.0.23 or later, which contains the fix for this vulnerability.
  2. Follow Oracle's security recommendations in the January 2021 Critical Patch Update.
  3. Implement principle of least privilege for all MySQL user accounts to minimize the risk of exploitation.
  4. Monitor system logs for unusual activities or unexpected crashes that might indicate exploitation attempts.
  5. Consider implementing additional security controls such as network segmentation to limit access to MySQL Server infrastructure.
  6. Review and restrict local access to systems hosting MySQL Server instances.

References

  1. Oracle Critical Patch Update - January 2021: https://www.oracle.com/security-alerts/cpujan2021.html
  2. NetApp Security Advisory: https://security.netapp.com/advisory/ntap-20210219-0003/
  3. Gentoo Linux Security Advisory GLSA-202105-27: https://security.gentoo.org/glsa/202105-27
  4. CVSS 3.1 Scoring: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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

Focus on What Matters

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

Let's talk!

background
Armis Vulnerability Intelligence Database