CVE-2024-43451: Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability
First published: Tue Nov 12 2024(Updated: )
Microsoft Windows contains an NTLMv2 hash spoofing vulnerability that could result in disclosing a user's NTLMv2 hash to an attacker via a file open operation. The attacker could then leverage this hash to impersonate that user.
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Server 2022 23H2 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Windows 11 | =23H2 | |
| Windows 11 | =22H2 | |
| Windows 11 | =22H2 | |
| Windows 11 | =24H2 | |
| Windows 11 | =24H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2022 | ||
| Microsoft Windows Server 2022 | ||
| Microsoft Windows 10 | <10.0.10240.20826 | |
| Microsoft Windows 10 | <10.0.10240.20826 | |
| Microsoft Windows 10 | <10.0.14393.7515 | |
| Microsoft Windows 10 | <10.0.14393.7515 | |
| Microsoft Windows 10 | <10.0.17763.6532 | |
| Microsoft Windows 10 | <10.0.17763.6532 | |
| Microsoft Windows 10 | <10.0.19044.5131 | |
| Microsoft Windows 10 | <10.0.19044.5131 | |
| Microsoft Windows 10 | <10.0.19044.5131 | |
| Microsoft Windows 10 | <10.0.19045.5131 | |
| Microsoft Windows 10 | <10.0.19045.5131 | |
| Microsoft Windows 10 | <10.0.19045.5131 | |
| Windows 11 | <10.0.22621.4460 | |
| Windows 11 | <10.0.22621.4460 | |
| Windows 11 | <10.0.22631.4460 | |
| Windows 11 | <10.0.22631.4460 | |
| Windows 11 | <10.0.26100.2314 | |
| Windows 11 | <10.0.26100.2314 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | <10.0.14393.7515 | |
| Microsoft Windows Server 2019 | <10.0.17763.6532 | |
| Microsoft Windows Server 2022 | <10.0.20348.2849 | |
| Microsoft Windows Server 2022 | <10.0.25398.1251 | |
| Microsoft Windows Server 2025 | <10.0.26100.2314 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | ||
| Windows 10 | =1809 | |
| Windows 10 | =1809 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =22H2 | |
| Windows 10 | =1607 | |
| Windows 10 | =1607 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | =21H2 | |
| Windows 10 | ||
| Windows 10 | ||
| Microsoft Windows Operating System |
Remedy
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Reference Links
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451 (Advisory)
- https://nvd.nist.gov/vuln/detail/CVE-2024-43451
- https://www.theregister.com/2024/11/13/november_patch_tuesday/
- https://www.bleepingcomputer.com/news/security/microsoft-patches-windows-zero-day-exploited-in-attacks-on-ukraine/
Frequently Asked Questions
What is the severity of CVE-2024-43451?
CVE-2024-43451 has a high severity rating due to the potential for NTLMv2 hash disclosure that can lead to user impersonation.
How do I fix CVE-2024-43451?
To mitigate CVE-2024-43451, apply the latest security patches provided by Microsoft for the affected Windows versions.
Which versions of Windows are affected by CVE-2024-43451?
CVE-2024-43451 affects various Windows versions including Windows 10 (all supported versions), Windows Server 2019, Windows 11, and Windows Server 2022.
How can an attacker exploit CVE-2024-43451?
An attacker can exploit CVE-2024-43451 by tricking users into performing file operations that inadvertently disclose their NTLMv2 password hashes.
Is there a workaround for CVE-2024-43451?
While the recommended solution is to apply updates, if immediate patching is not possible, limiting access to vulnerable file operations may serve as a temporary workaround.
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