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AUSCERT External Security Bulletin Redistribution
ESB-2023.3892
FortiOS/FortiProxy – Proxy mode with deep inspection –
Stack-based buffer overflow
12 July 2023
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AusCERT Security Bulletin Summary
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Product: FortiOS
FortiProxy
Publisher: Fortinet
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-33308
Original Bulletin:
https://fortiguard.fortinet.com/psirt/FG-IR-23-183
Comment: CVSS (Max): 9.8 CVE-2023-33308 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Fortinet
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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FortiOS/FortiProxy – Proxy mode with deep inspection – Stack-based buffer overflow
IR Number : FG-IR-23-183
Date : Jul 11, 2023
Severity : Critical
CVSSv3 Score : 9.8
Impact : Execute unauthorized code or commands
CVE ID : CVE-2023-33308
Affected Products:
FortiOS: 7.2.3, 7.2.2, 7.2.1, 7.2.0, 7.0.10, 7.0.9, 7.0.8, 7.0.7, 7.0.6, 7.0.5, 7.0.4,
7.0.3, 7.0.2, 7.0.1, 7.0.0
FortiProxy: 7.2.2, 7.2.1, 7.2.0, 7.0.9, 7.0.8, 7.0.7, 7.0.6, 7.0.5, 7.0.4, 7.0.3, 7.0.2,
7.0.1, 7.0.0
Summary
A stack-based overflow vulnerability [CWE-124] in FortiOS & FortiProxy may
allow a remote attacker to execute arbitrary code or command via crafted
packets reaching proxy policies or firewall policies with proxy mode alongside
SSL deep packet inspection.
Affected Products
FortiOS version 7.2.0 through 7.2.3
FortiOS version 7.0.0 through 7.0.10
FortiProxy version 7.2.0 through 7.2.2
FortiProxy version 7.0.0 through 7.0.9
Products NOT affected:
FortiOS 6.4 all versions
FortiOS 6.2 all versions
FortiOS 6.0 all versions
FortiProxy 2.x all versions
FortiProxy 1.x all versions
Solutions
Please upgrade to FortiOS version 7.2.4 or above
Please upgrade to FortiOS version 7.0.11 or above
Please upgrade to FortiProxy version 7.2.3 or above
Please upgrade to FortiProxy version 7.0.10 or above
Acknowledgement
This issue was resolved in a previous release as a bug without a corresponding
PSIRT Advisory. Fortinet would like to thank Watchtowr for sharing this
omission.
Timeline
2023-07-11: Initial publication
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The University of Queensland
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Internet Email: [email protected]
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