// For flags

CVE-2021-26089

Fortinet FortiClient Incorrect Permission Assignment Privilege Escalation Vulnerability

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

An improper symlink following in FortiClient for Mac 6.4.3 and below may allow an non-privileged user to execute arbitrary privileged shell commands during installation phase.

Un seguimiento inapropiado de los enlaces simbólicos en FortiClient para Mac versiones 6.4.3 y por debajo, puede permitir a un usuario no privilegiado ejecutar comandos de shell con privilegios arbitrarios durante la fase de instalación

This vulnerability allows local attackers to escalate privileges on affected installations of Fortinet FortiClient on Apple macOS. 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 FortiClient installer. The issue lies in the lack of proper permissions set on log files created by the installer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

*Credits: Csaba Fitzl (@theevilbit) of Offensive Security
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2021-01-25 CVE Reserved
  • 2021-06-17 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-10-25 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-59: Improper Link Resolution Before File Access ('Link Following')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Fortinet
Search vendor "Fortinet"
 Forticlient
Search vendor "Fortinet" for product "Forticlient"
 <= 6.4.3
Search vendor "Fortinet" for product "Forticlient" and version " <= 6.4.3"
macos
Affected