CVE-2019-1338HighCVSS 5.3

Windows NTLM Security Feature Bypass Vulnerability

Published
October 8, 2019
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2019-1338 →

📋 Description

A security feature bypass vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLMv2 protection if a client is also sending LMv2 responses. An attacker who successfully exploited this vulnerability could gain the ability to downgrade NTLM security features. To exploit this vulnerability, the attacker would need to be able to modify NTLM traffic exchange. The update addresses the vulnerability by hardening NTLMv2 protection on the server-side.

🎯 Affected products10

  • Windows 7 for 32-bit Systems Service Pack 1
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)

✅ Remediation

KB4519976 (Monthly Rollup) KB4520003 (Security Only) KB4520002 (Monthly Rollup) KB4520009 (Security Only)

🔗 References (5)