#VU60723 Time-of-check Time-of-use (TOCTOU) Race Condition in Parallels Desktop - CVE-2021-34986
Published: February 21, 2022
Vulnerability identifier: #VU60723
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-34986
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Parallels Desktop
Parallels Desktop
Software vendor:
Parallels
Parallels
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to Time-of-check Time-of-use condition within the Parallels Service. A local user can create a symbolic link, abuse the service to execute a file and gain elevated privileges on the system.
Remediation
Install updates from vendor's website.