CVE-2015-1637:Schannel in Microsoft Windows is vulnerable to a cipher-downgrade attack via crafted TLS traffic, known as the "FREAK" issue.

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Schannel (aka Secure Channel) in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not properly restrict TLS state transitions. This vulnerability makes it easier for remote attackers to conduct cipher-downgrade attacks to EXPORT_RSA ciphers via crafted TLS traffic, related to the "FREAK" issue. This is a different vulnerability than CVE-2015-0204 and CVE-2015-1067.

Overview

The vulnerability in Schannel allows remote attackers to manipulate TLS state transitions, enabling them to perform cipher-downgrade attacks to EXPORT_RSA ciphers. This could potentially lead to the compromise of sensitive information transmitted over TLS connections.

Remediation

To remediate this vulnerability, Microsoft released security update MS15-031. Users and administrators are advised to apply the necessary patches to the affected systems to mitigate the risk of exploitation. Additionally, it is recommended to disable support for EXPORT_RSA ciphers to prevent potential attacks leveraging this vulnerability.

References

  1. Microsoft Security Bulletin MS15-031: https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
  2. SecurityTracker: http://www.securitytracker.com/id/1031833
  3. SecurityFocus BID: http://www.securityfocus.com/bid/72965
  4. FREAK Attack Website: https://freakattack.com/
  5. Archived FREAK Attack Website: http://web.archive.org/web/20150321220028/https://freakattack.com/

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

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Armis Vulnerability Intelligence Database