Advisory Details

January 17th, 2022

Fortinet FortiClient Network Access Control Uncontrolled Search Path Element Privilege Escalation Vulnerability

ZDI-22-078
ZDI-CAN-14137

CVE ID CVE-2021-26089
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Fortinet
AFFECTED PRODUCTS FortiClient
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Fortinet FortiClient Network Access Control. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the Network Access Control service. The service loads an OpenSSL configuration file from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

ADDITIONAL DETAILS Fortinet has issued an update to correct this vulnerability. More details can be found at:
https://www.fortiguard.com/psirt/FG-IR-21-022
DISCLOSURE TIMELINE
  • 2021-07-30 - Vulnerability reported to vendor
  • 2022-01-17 - Coordinated public release of advisory
CREDIT brsn
BACK TO ADVISORIES