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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3426
FortiOS HTTPD is vulnerable to a Stack-based Buffer Overflow vulnerability
                              2 October 2020

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

Product:           FortiOS
Publisher:         Fortinet
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-17656  

Original Bulletin: 
   https://fortiguard.com/psirt/FG-IR-19-248

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FortiOS HTTPD is vulnerable to a Stack-based Buffer Overflow vulnerability

IR Number : FG-IR-19-248

Date      : Oct 01, 2020

Risk      : 3/5

Impact    : Crash of the HTTPD service.

CVE ID    : CVE-2019-17656

CVE ID    : CVE-2019-17656

Summary

A Stack-based Buffer Overflow vulnerability in the HTTPD daemon of FortiOS may
allow an authenticated remote attacker to crash the service by sending a
malformed PUT request to the server. Fortinet is not aware of any successful
exploitation of this vulnerability that would lead to code execution.

Impact

Crash of the HTTPD service.

Affected Products

FortiOS versions 6.0.10 and below. FortiOS versions 6.2.2 and below.

Solutions

Please upgrade to FortiGate version 6.0.11 or above. Please upgrade to
FortiGate version 6.2.3 or above. Please upgrade to FortiGate version 6.4.0 or
above.

Acknowledgement

Fortinet is pleased to thank Cody Sixteen ( https://code610.blogspot.com/) for
reporting this issue under responsible disclosure.

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===========================================================================
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