Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
E
Physical
RL
O
RC
Changed
Affected products
- Microsoft / Windows 10 Version 150710.0.10240.0 – publication
- Microsoft / Windows 10 Version 160710.0.14393.0 – publication
- Microsoft / Windows 10 Version 170310.0.0 – publication
- Microsoft / Windows 10 Version 170910.0.0 – publication
- Microsoft / Windows 10 Version 1709 for 32-bit Systems10.0.0 – publication
- Microsoft / Windows 10 Version 180310.0.0 – publication
- Microsoft / Windows 10 Version 180910.0.0 – publication
- Microsoft / Windows 10 Version 180910.0.17763.0 – publication
- Microsoft / Windows 10 Version 1903 for 32-bit Systems10.0.0 – publication
- Microsoft / Windows 10 Version 1903 for ARM64-based Systems10.0.0 – publication
- Microsoft / Windows 10 Version 1903 for x64-based Systems10.0.0 – publication
- Microsoft / Windows 76.1.0 – publication
- Microsoft / Windows 7 Service Pack 16.1.0 – publication
- Microsoft / Windows 8.16.3.0 – publication
- Microsoft / Windows Server 2008 R2 Service Pack 16.1.7601.0 – publication
- Microsoft / Windows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 – publication
- Microsoft / Windows Server 2008 R2 Systems Service Pack 16.1.0 – publication
- Microsoft / Windows Server 2008 Service Pack 26.0.0 – publication
- Microsoft / Windows Server 2008 Service Pack 26.0.6003.0 – publication
- Microsoft / Windows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 – publication
- Microsoft / Windows Server 20126.2.9200.0 – publication
- Microsoft / Windows Server 2012 R26.3.9600.0 – publication
- Microsoft / Windows Server 2012 R2 (Server Core installation)6.3.9600.0 – publication
- Microsoft / Windows Server 2012 (Server Core installation)6.2.9200.0 – publication
- Microsoft / Windows Server 201610.0.14393.0 – publication
- Microsoft / Windows Server 2016 (Server Core installation)10.0.14393.0 – publication
- Microsoft / Windows Server 201910.0.17763.0 – publication
- Microsoft / Windows Server 2019 (Server Core installation)10.0.17763.0 – publication
- Microsoft / Windows Server, version 1803 (Server Core Installation)10.0.0 – publication
- Microsoft / Windows Server, version 1903 (Server Core installation)10.0.0 – publication