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Windows NTLM Tampering Vulnerability - CVE-2019-1166

oval:org.cisecurity:def:6542

A tampering vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLM MIC (Message Integrity Check) protection. 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 tamper with the NTLM exchange. The attacker could then modify flags of the NTLM packet without invalidating the signature. The update addresses the vulnerability by hardening NTLM MIC protection on the server-side.

Family:
windows
Status:
ACCEPTED
Platform(s):
  • Microsoft Windows Server 2008 R2
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2008
  • Microsoft Windows 7
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows 8.1
  • Microsoft Windows Server 2016
  • Microsoft Windows 10
  • Microsoft Windows Server 2019
Class:
vulnerability
Reference(s):
  • CVE-2019-1166
  • MSRC-CVE-2019-1166
  • KB4520003
  • KB4520009
  • KB4519985
  • KB4519990
  • KB4520011
  • KB4519998
  • KB4520010
  • KB4520004
  • KB4520008
  • KB4519338
  • KB4517389
Product(s):