Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.
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
10.0.17763.5696 — https://support.microsoft.com/help/5036896
10.0.20348.2402 — https://support.microsoft.com/help/5036909
10.0.20348.2333 — https://support.microsoft.com/help/5035959
10.0.25398.830 — https://support.microsoft.com/help/5036910
10.0.14393.6897 — https://support.microsoft.com/help/5036899
6.3.9600.21924 — https://support.microsoft.com/help/5036960
Vulnerabilities 1
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High 7.5
Windows Kerberos Security Feature Bypass Vulnerability
Windows Kerberos Security Feature Bypass Vulnerability
Revision history
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#3
Updated acknowledgment. This is an informational change only.
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#2
The following changes have been made: 1) In the Security Updates table, removed all supported client versions of Windows 10 and Windows 11 as they are not affected by this vulnerability. 2) To comprehensively address CVE-2024-21427 Microsoft has released April 2024 security updates for all affected versions of Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2022, 23H2 Edition. Microsoft strongly recommends that customers install the updates to be fully protected from the vulnerability. Customers whose systems are configured to receive automatic updates do not need to take any further action.
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#1
Information published.
References
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CVE-2024-21427 Windows Kerberos Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21427
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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