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AUSCERT External Security Bulletin Redistribution
ESB-2019.4407.2
Hardcoded cryptographic key in the FortiGuard services
communication protocol
6 December 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: FortiOS
Publisher: FortiGuard
Operating System: Network Appliance
Windows
Mac OS
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-9195
Original Bulletin:
https://fortiguard.com/psirt/FG-IR-18-100
Revision History: December 6 2019: Vendor updated "affected products" table
implying FortiOS 6.0.7 does not contain the fix
November 21 2019: Initial Release
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Hardcoded cryptographic key in the FortiGuard services communication protocol
IR Number : FG-IR-18-100
Date : Nov 20, 2019
Risk : 3/5
Impact : Information disclosure
CVE ID : CVE-2018-9195
CVE ID : CVE-2018-9195
Summary
Use of a hardcoded cryptographic key in the FortiGuard services communication
protocol may allow a Man in the middle with knowledge of the key to eavesdrop
on and modify information (URL/SPAM services in FortiOS 5.6, and URL/SPAM/AV
services in FortiOS 6.0.; URL rating in FortiClient) sent and received from
Fortiguard servers by decrypting these messages.
Impact
Information disclosure
Affected Products
All versions below FortiOS 6.2.0
All versions below FortiClientWindows 6.2.0
All versions below FortiClientMac 6.2.2
Solutions
Upgrade to FortiOS 6.2.0 then manually change the configuration to use TLS as
communication protocol with FortiGuard servers after upgrade or do a fresh
install to get the new default which is the TLS based system.
Upgrade to FortiClientWindows 6.2.0 or FortiClientMac 6.2.2 then change EMS
configuration in the Endpoint Profile to use "FortiGuard Anycast". The new
option is provided for Web Filter tab, as well as System Settings tab.
Acknowledgement
Fortinet is pleased to thank Stefan Viehbock - SEC Consult Vulnerability Lab
for reporting this under responsible disclosure.
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The University of Queensland
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