CVE-2016-6309:A vulnerability in OpenSSL 1.1.0a allows remote attackers to cause a denial of service (use-after-free) or potentially execute arbitrary code via a crafted TLS session.

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Description Preview

The vulnerability identified as CVE-2016-6309 exists in the `statem/statem.c` file of OpenSSL 1.1.0a. It fails to properly handle memory-block movement after a `realloc` call, which can lead to a use-after-free condition. This flaw can be exploited by remote attackers through specially crafted TLS sessions, potentially resulting in a denial of service or arbitrary code execution.

Overview

CVE-2016-6309 is a critical security vulnerability affecting OpenSSL 1.1.0a. The issue arises from improper memory management, specifically related to the handling of memory blocks after they have been reallocated. Attackers can exploit this vulnerability by sending crafted TLS sessions to the affected OpenSSL implementation, which may lead to severe consequences, including service disruption or unauthorized code execution.

Remediation

To mitigate the risks associated with CVE-2016-6309, it is recommended that users of OpenSSL 1.1.0a upgrade to a patched version of OpenSSL. Users should regularly check for updates and apply security patches provided by their vendors. It is also advisable to review and implement security best practices for managing TLS sessions and memory handling in applications that utilize OpenSSL.

References

  1. Tenable Security Advisory
  2. Oracle Security Advisory - January 2018
  3. OpenSSL Security Advisory - September 2016
  4. HPE Security Advisory
  5. IBM Security Advisory
  6. SecurityTracker Entry 1036885
  7. Oracle Security Advisory - October 2016
  8. Tenable Security Advisory
  9. OpenSSL Git Commit
  10. SecurityFocus BID 93177
  11. Oracle Security Advisory - April 2018
  12. Bluecoat Security Advisory
  13. Oracle Security Advisory - July 2017
  14. Juniper Networks Security Advisory

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

Focus on What Matters

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

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