FortiClient Linux: Execute Arbitrary Code/Commands -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3012
           FortiClient Linux -  Command injection vulnerability
                             8 September 2021

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

Product:           FortiClient Linux
Publisher:         FortiGuard Labs
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-22127  

Original Bulletin: 
   https://fortiguard.com/psirt/FG-IR-20-241

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FortiClient Linux -  Command injection vulnerability

IR Number    : FG-IR-20-241
Date         : Sep 7, 2021
Risk         : 4/5
CVSSv3 Score : 6.7
Impact       : Execute unauthorized code or commands
CVE ID       : CVE-2021-22127
Affected Products: FortiClientLinux
Language     : English
Portuguese

Summary

An OS command injection (CWE-78) vulnerability in FortiClient for Linux may
allow an unauthenticated, network-adjacent attacker to execute privileged and
arbitrary commands on the Linux appliance on which FortiClient is running by
tricking the user into connecting to a network with a malicious name (SSID).

A successful attack requires that the attacker has control over the access
point the host is connected to.

Affected Products

FortiClient for Linux versions 6.2.8 and below.
FortiClient for Linux versions 6.4.2 and below.

Solutions

Please upgrade to FortiClient for Linux version 6.2.9 or above.
Please upgrade to FortiClient for Linux version 6.4.3 or above.

Acknowledgement

Internally discovered and reported by Mattia Fecit of Fortinet PSIRT team.

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