#VU58953 Out-of-bounds write in Windows and Windows Server - CVE-2021-43217
Published: December 14, 2021
Vulnerability identifier: #VU58953
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-43217
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in Windows Encrypting File System (EFS). A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.
Remediation
Install updates from vendor's website.