CVE-2019-12258:Session fixation vulnerability in Wind River VxWorks IPNET TCP stack (CVE-2019-12258) that can cause denial of service of TCP connections via malformed TCP options on VxWorks 6.6–vx7.

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Wind River VxWorks versions 6.6 through vx7 contain a session fixation weakness in the IPNET TCP component. This IPNET security vulnerability can lead to denial of service (DoS) of TCP connections when handling malformed TCP options. The issue is publicly documented under CVE-2019-12258 and is associated with multiple vendor advisories and notices.

Overview

Wind River VxWorks 6.6 through vx7 expose a session fixation vulnerability in the IPNET TCP stack that can be exploited to disrupt TCP connectivity by exploiting malformed TCP options, resulting in DoS conditions on affected devices. The vulnerability is cataloged as CVE-2019-12258 and has been addressed in vendor security advisories.

Remediation

  • Identify affected devices running Wind River VxWorks 6.6 to vx7 and review Wind River security advisories (IPNET and CVE-2019-12258) for the recommended patch or upgrade path.
  • Apply the vendor-provided fix: upgrade or patch the IPNET TCP stack as per Wind River’s security notices (refer to urgent11 guidance and related advisories) to mitigate CVE-2019-12258.
  • If a direct patch/upgrade cannot be applied, implement network-level mitigations at the edge (firewall/IPS) to filter or limit malformed TCP options and reduce exposure to untrusted networks.
  • Enable monitoring and logging for anomalous TCP option patterns and DoS indicators, and verify patch installation with vendor guidance.
  • After remediation, test TCP connectivity to ensure the DoS condition can no longer be triggered and that normal traffic flows are unaffected.

References

  • https://support2.windriver.com/index.php?page=security-notices
  • https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0009
  • https://cert-portal.siemens.com/productcert/pdf/ssa-632562.pdf
  • https://security.netapp.com/advisory/ntap-20190802-0001/
  • https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/
  • https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12258
  • https://support.f5.com/csp/article/K41190253
  • https://cert-portal.siemens.com/productcert/pdf/ssa-189842.pdf
  • https://cert-portal.siemens.com/productcert/pdf/ssa-352504.pdf

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