VulnerabilityAnalyzed
CVE-2024-21338
Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
KEVHIGH 7.8EPSS 59.8%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 25 March 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Windows Kernel Elevation of Privilege Vulnerability
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 59.81% probability · 99th percentile
- CISA KEV
- Listed 4 March 2024 · due 25 March 2024 · used in ransomware campaigns
- Weakness
- CWE-822
- Affected
- microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2
- Source
- secure@microsoft.com
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338; https://nvd.nist.gov/vuln/detail/CVE-2024-21338
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338Patch, Vendor Advisory
- https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/Exploit, Technical Description, Third Party Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338Patch, Vendor Advisory
- https://packetstorm.news/files/id/190586/Exploit, VDB Entry
- https://www.exploit-db.com/exploits/52275Exploit, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.