UNIX symbolic link following in Fortinet FortiClient for Windows - CVE-2021-26089
Published: June 17, 2021 / Updated: July 14, 2021
Vulnerability identifier: #VU54205
CSH Severity: Low
CVSS v4.0: 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-2021-26089
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Fortinet, Inc
Affected software:
Fortinet FortiClient for Windows
Fortinet FortiClient for Windows
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue in FortiClient installer for MacO. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.
Successful exploitation of this vulnerability may result in privilege escalation.
How to mitigate CVE-2021-26089
Install updates from vendor's website.