CVE-2023-40718

Published Oct 10, 2023 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158 allows attacker to evade IPS features via crafted TCP packets.

Remediation

Vendor Solution

IPS Engine manual download is not needed unless device is offline and cannot download IPS Engine update automatically. Fixed in IPS Engine version 6.0159 and later.   FortiOS 6.4.13 and later contains IPS engine 6.0160 as the default IPS Engine.   IPS Engine 6.0162 is downloadable from FortiGuard by FortiGate units with a valid subscription running FortiOS 6.4.x. Fixed in IPS Engine version 7.0166 and later.   FortiOS 7.0.12 and later contains IPS engine 7.0167 as the default IPS Engine. Fixed in IPS Engine version 7.0313 and later.   FortiOS 7.2.5 and later contains IPS engine 7.0314 as the default IPS Engine.   IPS Engine 7.0322 is downloadable from FortiGuard by FortiGate units with a valid subscription running FortiOS 7.2.x. FortiOS 7.4.0 and later contains IPS engine 7.0493 as the default IPS Engine.  

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-45272 A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158 allows attacker to evade IPS features via crafted TCP packets.
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
fortinet
Published
Updated
Sep 18, 2024, 7:03 PM
Reserved
Aug 21, 2023, 9:03 AM
Status
Modified
Published
Oct 10, 2023, 5:15 PM
Modified
Jun 17, 2026, 6:19 AM