#VU51304 Time-of-check Time-of-use (TOCTOU) Race Condition in Windows and Windows Server - CVE-2021-1640
Published: March 9, 2021 / Updated: April 30, 2021
Vulnerability identifier: #VU51304
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-1640
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the Print Spooler service. A local user can create a directory junction and force the Print Spooler service to delete arbitrary files on the system. Successful exploitation of the vulnerability may result in denial of service.
Remediation
Install updates from vendor's website.