CVE-2019-1040: Windows NTLM Tampering Vulnerability
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, aka 'Windows NTLM Tampering Vulnerability'.
Other sources
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.
— Microsoft
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2019-1040?
CVE-2019-1040 has a CVSS score of 7.5, indicating it is of high severity.
How do I fix CVE-2019-1040?
To fix CVE-2019-1040, apply the latest security updates provided by Microsoft for affected Windows versions.
Which software versions are affected by CVE-2019-1040?
CVE-2019-1040 affects various versions of Windows including Windows 10, Windows 7, and Windows Server editions.
What type of vulnerability is CVE-2019-1040?
CVE-2019-1040 is a tampering vulnerability that allows a man-in-the-middle attacker to bypass NTLM MIC protection.
Can exploitation of CVE-2019-1040 lead to data breaches?
Yes, exploitation of CVE-2019-1040 could potentially allow attackers to downgrade NTLM security features, leading to data breaches.