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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.2099
        FortiClient - Privilege escalation in FortiClient installer
                                6 May 2022

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           FortiClient
Publisher:         Fortinet
Operating System:  Network Appliance
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-43066  

Original Bulletin: 
   https://fortiguard.fortinet.com/psirt/FG-IR-21-154

Comment: CVSS (Max):  None available when published

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FortiClient - Privilege escalation in FortiClient installer

IR Number    : FG-IR-21-154
Date         : May 3, 2022
Severity     : High
CVSSv3 Score : 8.8
Impact       : Escalation of privilege
CVE ID       : CVE-2021-43066
Affected Products: FortiClientWindows :
 7.0.2, 7.0.1, 7.0.0, 6.4.6, 6.4.5, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 
 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.0.9, 6.0.8, 
 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.10, 6.0.1, 6.0.0

Summary

An external control of file name or path vulnerability [CWE-73] in FortiClient
Windows may allow an unprivileged attacker to delete or execute files with
admin rights via the MSI installer.

Affected Products

FortiClientWindows version 6.0.X
FortiClientWindows version 6.2.X
FortiClientWindows version 6.4.0 through 6.4.6
FortiClientWindows version 7.0.0 through 7.0.2

Solutions

Upgrade to FortiClient 7.0.3 or above
Upgrade to FortiClient 6.4.7 or above

Acknowledgement

Ilias Dimopoulos of RedyOps Research Labs

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