CVE-2023-40718 : A interpretation conflict in Fortinet IPS Engine versions 7.321, 7.166 and 6.158

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.

Published 2023-10-10 17:15:13

Updated 2023-10-13 18:38:48

Source Fortinet, Inc.

View at NVD, CVE.org

Products affected by CVE-2023-40718

Fortinet » Fortios Ips Engine
Versions up to, including, (<=) 7.312
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fortinet » Fortios
Fortinet » Fortios Ips Engine
Versions up to, including, (<=) 6.158
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fortinet » Fortios
Fortinet » Fortios Ips Engine
Versions up to, including, (<=) 7.165
cpe:2.3:a:fortinet:fortios_ips_engine:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fortinet » Fortios

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 29 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	Fortinet, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE-436 Interpretation Conflict

Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.

Assigned by: nvd@nist.gov (Primary)

https://fortiguard.com/psirt/FG-IR-23-090

PSIRT Advisories | FortiGuard
Vendor Advisory

Jump to