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symantecSymantec Security ResponseSMNTC-110246
HistoryOct 08, 2019 - 12:00 a.m.

Microsoft Windows CVE-2019-1166 NTLM Tampering Security Bypass Vulnerability

2019-10-0800:00:00
Symantec Security Response
www.symantec.com
67

Description

Microsoft Windows is prone to a security bypass vulnerability. Successfully exploiting this issue may allow attackers to bypass certain security restrictions and perform unauthorized actions by conducting a man-in-the-middle attack. This may lead to other attacks.

Technologies Affected

  • Microsoft Windows 10 Version 1607 for 32-bit Systems
  • Microsoft Windows 10 Version 1607 for x64-based Systems
  • Microsoft Windows 10 Version 1709 for ARM64-based Systems
  • Microsoft Windows 10 Version 1803 for 32-bit Systems
  • Microsoft Windows 10 Version 1803 for ARM64-based Systems
  • Microsoft Windows 10 Version 1803 for x64-based Systems
  • Microsoft Windows 10 Version 1809 for 32-bit Systems
  • Microsoft Windows 10 Version 1809 for ARM64-based Systems
  • Microsoft Windows 10 Version 1809 for x64-based Systems
  • Microsoft Windows 10 Version 1903 for 32-bit Systems
  • Microsoft Windows 10 Version 1903 for ARM64-based Systems
  • Microsoft Windows 10 Version 1903 for x64-based Systems
  • Microsoft Windows 10 for 32-bit Systems
  • Microsoft Windows 10 for x64-based Systems
  • Microsoft Windows 10 version 1703 for 32-bit Systems
  • Microsoft Windows 10 version 1703 for x64-based Systems
  • Microsoft Windows 10 version 1709 for 32-bit Systems
  • Microsoft Windows 10 version 1709 for x64-based Systems
  • Microsoft Windows 7 for 32-bit Systems SP1
  • Microsoft Windows 7 for x64-based Systems SP1
  • Microsoft Windows 8.1 for 32-bit Systems
  • Microsoft Windows 8.1 for x64-based Systems
  • Microsoft Windows RT 8.1
  • Microsoft Windows Server 1803
  • Microsoft Windows Server 1903
  • Microsoft Windows Server 2008 R2 for Itanium-based Systems SP1
  • Microsoft Windows Server 2008 R2 for x64-based Systems SP1
  • Microsoft Windows Server 2008 for 32-bit Systems SP2
  • Microsoft Windows Server 2008 for Itanium-based Systems SP2
  • Microsoft Windows Server 2008 for x64-based Systems SP2
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits

Updates are available. Please see the references or vendor advisory for more information.