CVE-2021-2438:Vulnerability in Oracle Database Server's Java VM component allows low privileged attackers to cause partial denial of service.

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CVE-2021-2438 affects the Java VM component of Oracle Database Server versions 12.1.0.2, 12.2.0.1, and 19c. This vulnerability can be exploited by attackers with Create Procedure privilege and network access via Oracle Net. Successful exploitation results in an unauthorized ability to cause partial denial of service (DOS) of the Java VM component. The vulnerability has a CVSS 3.1 Base Score of 4.3, primarily impacting availability.

Overview

This vulnerability exists in the Java VM component of Oracle Database Server and affects multiple versions (12.1.0.2, 12.2.0.1, and 19c). It is considered easily exploitable by attackers who possess the Create Procedure privilege and can access the database via Oracle Net. The main impact is on availability, as successful exploitation allows attackers to cause partial denial of service of the Java VM component. The vulnerability does not impact confidentiality or integrity of the system. With a CVSS score of 4.3, it is considered a medium severity vulnerability that primarily affects system availability.

Remediation

To address this vulnerability, organizations should apply the security patches provided in the Oracle Critical Patch Update (CPU) from July 2021. Oracle recommends the following actions:

  1. Update affected Oracle Database Server installations to the patched versions available in the July 2021 CPU.
  2. If immediate patching is not possible, consider implementing the following temporary mitigations:
    • Review and restrict the Create Procedure privilege to only trusted users
    • Implement network access controls to limit Oracle Net connections to trusted sources
    • Monitor for unusual activities related to Java VM usage in the database
  3. Regularly apply Oracle security patches as part of an ongoing security maintenance program.

References

  1. Oracle Critical Patch Update Advisory - July 2021: https://www.oracle.com/security-alerts/cpujul2021.html
  2. CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L (Base Score: 4.3)
  3. Affected Oracle Database Server versions: 12.1.0.2, 12.2.0.1, and 19c

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

Focus on What Matters

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

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