FortiGate SSL VPN: Cross-site Scripting -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1887
             FortiGate SSL VPN portal is vulnerable to an XSS
                                2 June 2021

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

Product:           FortiGate SSL VPN
Publisher:         FortiGuard Labs
Operating System:  Network Appliance
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-26092  

Original Bulletin: 
   https://fortiguard.com/psirt/FG-IR-20-199

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FortiGate SSL VPN portal is vulnerable to an XSS

IR Number    : FG-IR-20-199
Date         : May 30, 2021
Risk         : 3/5
CVSSv3 Score : 4.6
Impact       : Execute unauthorized code or commands.
CVE ID       : CVE-2021-26092

Summary

Failure to sanitize input in the SSL VPN web portal may allow a remote
unauthenticated attacker to perform a reflected Cross-site Scripting (XSS)
attack by sending a request to the error page with malicious GET parameters.

Impact

Execute unauthorized code or commands.

Affected Products

FortiGate versions 5.6.13 and below. FortiGate versions 6.0.12 and below.
FortiGate versions 6.2.7 and below. FortiGate versions 6.4.5 and below.

Solutions

Please upgrade to FortiGate version 6.0.13 or above. Please upgrade to
FortiGate version 6.2.8 or above. Please upgrade to FortiGate version 6.4.6 or
above. Please upgrade to FortiGate version 7.0.0 or above.

Acknowledgement

Fortinet is pleased to thank Damian Rusinek for reporting this issue under
responsible disclosure.

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