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CVE-2024-43639 · Windows KDC Proxy Remote Code Execution Vulnerability

No description was published by MSRC.

Severity
Critical
Impact
Remote Code Execution
CVSS
9.8 base · 8.5 temporal
Release
2024-11-12
Signals
Windows Kerberos Remote Code Execution Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-197: Numeric Truncation Error
Patch Diff
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Resolved binary override
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Description
No description was published by MSRC.
FAQ / Articles
FAQ
How could an attacker exploit this vulnerability? An unauthenticated attacker could use a specially crafted application to leverage a cryptographic protocol vulnerability in Windows Kerberos to perform remote code execution against the target.
FAQ
Is KDC Proxy Server service (KPSSVC) a dependency of KKDCP? The vulnerability only exists on the KPSSVC server. We recommend that instances of KPSSVC server be patched immediately. Must KPSSVC be running for KKDCP to be enabled and functional? Yes. Will KPSSVC be started on-demand? No. You are only vulnerable if you are already using KPSSVC in your environment. KPSSVC is an additional feature Microsoft has been providing since Windows Server 2012. If you do not have it configured in your environment, then this vulnerability is not exploitable.
FAQ
Are all Windows Servers affected by this vulnerability? This vulnerability only affects Windows Servers that are configured as a [MS-KKDCP]: Kerberos Key Distribution Center (KDC) Proxy Protocol server. Domain controllers are not affected.