Summary
Impact: Security Feature Bypass. Microsoft rating: Critical. Not known to be exploited — Exploitation More Likely. Customer action: Required.
Details
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
This vulnerability could be triggered when a user connects a Windows client to a malicious server.
How could an attacker exploit this vulnerability?
When multiple attack vectors can be used, we assign a score based on the scenario with the higher risk. In one such scenario for this vulnerability, the attacker could convince a victim to connect to an attacker controlled malicious application (for example, SMB) server. Upon connecting, the malicious server could compromise the protocol.
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
The authentication feature could be bypassed as this vulnerability allows impersonation.
Security updates
10.0.17763.5329 — https://support.microsoft.com/help/5034127
10.0.20348.2227 — https://support.microsoft.com/help/5034129
10.0.22000.2713 — https://support.microsoft.com/help/5034121
10.0.19044.3930 — https://support.microsoft.com/help/5034122
10.0.22621.3007 — https://support.microsoft.com/help/5034123
10.0.25398.643 — https://support.microsoft.com/help/5034130
10.0.10240.20402 — https://support.microsoft.com/help/5034134
10.0.14393.6614 — https://support.microsoft.com/help/5034119
6.0.6003.22464 — https://support.microsoft.com/help/5034173
6.0.6003.22464 — https://support.microsoft.com/help/5034176
6.1.7601.26910 — https://support.microsoft.com/help/5034169
6.1.7601.26910 — https://support.microsoft.com/help/5034167
6.2.9200.24664 — https://support.microsoft.com/help/5034184
6.3.9600.21765 — https://support.microsoft.com/help/5034171
Vulnerabilities 1
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High 8.8
Windows Kerberos Security Feature Bypass Vulnerability
Windows Kerberos Security Feature Bypass Vulnerability
Revision history
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#3
Updated the following CVSS metrics and updated the FAQs that explain these metrics: AV:N, PR:N, UI:R. These are informational changes only.
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#1
Information published.
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#2
Updated FAQ information. This is an informational change only.
References
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CVE-2024-20674 Windows Kerberos Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20674
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss