CVE-2018-9194

MediumCVSS 5.9/10Last modified Jun 17, 2026

Description

A plaintext recovery of encrypted messages or a Man-in-the-middle (MiTM) attack on RSA PKCS #1 v1.5 encryption may be possible without knowledge of the server's private key. Fortinet FortiOS 5.4.6 to 5.4.9, 6.0.0 and 6.0.1 are vulnerable by such attack under VIP SSL feature when CPx being used.

Metrics

CVSS 3.0 5.9/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203

Affected software

Vendor	Product	Versions
Fortinet, Inc.	FortiOS	6.0.1, 6.0.0; 5.4.9, 5.4.8, 5.4.7, 5.4.6

References

https://fortiguard.com/advisory/FG-IR-17-302Vendor Advisory
https://robotattack.org/Third Party Advisory
https://www.kb.cert.org/vuls/id/144389Third Party Advisory, US Government Resource
https://fortiguard.com/advisory/FG-IR-17-302Vendor Advisory
https://robotattack.org/Third Party Advisory
https://www.kb.cert.org/vuls/id/144389Third Party Advisory, US Government Resource

Timeline

Published: Sep 5, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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