Vulnerability Details CVE-2019-1040
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.907
EPSS Ranking 99.6%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
Products affected by CVE-2019-1040
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cpe:2.3:o:microsoft:windows_10:-
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cpe:2.3:o:microsoft:windows_10:1607
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cpe:2.3:o:microsoft:windows_10:1703
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cpe:2.3:o:microsoft:windows_10:1709
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cpe:2.3:o:microsoft:windows_10:1803
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cpe:2.3:o:microsoft:windows_10:1809
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cpe:2.3:o:microsoft:windows_10:1903
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cpe:2.3:o:microsoft:windows_7:-
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cpe:2.3:o:microsoft:windows_8.1:-
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cpe:2.3:o:microsoft:windows_rt_8.1:-
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cpe:2.3:o:microsoft:windows_server_2008:-
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cpe:2.3:o:microsoft:windows_server_2008:r2
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cpe:2.3:o:microsoft:windows_server_2012:-
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cpe:2.3:o:microsoft:windows_server_2012:r2
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cpe:2.3:o:microsoft:windows_server_2016:-
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cpe:2.3:o:microsoft:windows_server_2016:1803
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cpe:2.3:o:microsoft:windows_server_2016:1903
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cpe:2.3:o:microsoft:windows_server_2019:-