[ CVE-2024-21338 · Published 13 Feb 2024 ]
Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
Exploited · CISA KEV CVSS 7.8
EPSS 60%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2024-03-04
- Known to be used in ransomware campaigns
- EPSS: 60% chance of exploitation in the next 30 days (higher than 99% of CVEs)
[ Description ]Official description
Windows Kernel Elevation of Privilege Vulnerability
CISA: Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 25 Mar 2024): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Patch on msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338PatchVendor Advisory
- decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-adm…ExploitTechnical DescriptionThird Party Advisory
- packetstorm.news/files/id/190586ExploitVDB Entry
- www.exploit-db.com/exploits/52275ExploitVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource