Actively exploited · Published Feb 13, 2024 · Assigned by microsoft
CVE-2024-21338Windows Kernel Elevation of Privilege Vulnerability
High 7.8 Exploited Ransomware
In plain English
A high-severity security flaw in Windows 10 Version 1809 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on March 4, 2024). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 59.8% (higher than 99.1% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Mar 25, 2024.
Official description
Windows Kernel Elevation of Privilege Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – before 10.0.17763.5458 |
| Microsoft | Windows 10 Version 1809 | 10.0.0 – before 10.0.17763.5458 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19043.0 – before 10.0.19044.4046 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.4046 |
| Microsoft | Windows 11 version 21H2 | 10.0.0 – before 10.0.22000.2777 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 – before 10.0.22621.3155 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – before 10.0.22631.3155 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.3155 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – before 10.0.17763.5458 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – before 10.0.17763.5458 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.2322 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.709 |
Weakness: CWE-822 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
References
- Windows Kernel Elevation of Privilege Vulnerability vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338 government-resource
- https://www.exploit-db.com/exploits/52275
- https://packetstorm.news/files/id/190586/
- https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/ x_transferred