FortiProxy: Denial of Service -- Existing Account

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1162
         FortiProxy - HTTPD is vulnerable to a Stack-based Buffer
                          Overflow vulnerability
                               7 April 2021

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

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

Reference:         ESB-2020.3426

Original Bulletin: 
   https://fortiguard.com/psirt/FG-IR-21-007

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

IR Number    : FG-IR-21-007
Date         : Apr 05, 2021
Risk         : 3/5
CVSSv3 Score : 5.3
Impact       : Crash of the HTTPD service.
CVE ID       : CVE-2019-17656

Summary

A stack-based buffer overflow vulnerability in the HTTPD daemon of FortiProxy
may allow an authenticated remote attacker to crash the service by sending a
malformed PUT request to the server.

Impact

Crash of the HTTPD service.

Affected Products

FortiProxy versions 2.0.1 and below. FortiProxy versions 1.2.9 and below.
FortiProxy versions 1.1.x. FortiProxy versions 1.0.x.

Solutions

Please upgrade to Fortiproxy version 1.2.10 or above. Please upgrade to
Fortiproxy version 2.0.2 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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