PT-2017-3716 · Fortinet · Fortios

Published 2017-12-12 · Updated 2019-10-03 · CVE-2018-9194

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions: FortiOS versions 5.4.6 through 5.4.9 FortiOS versions 6.0.0 through 6.0.1

Description: The issue is related to a weakness in the implementation of the TLS protocol in FortiOS, specifically in the encryption algorithm. This weakness can be exploited by a remote attacker to decrypt messages without knowing the secret key, potentially leading to a Man-in-the-middle (MiTM) attack. The attack is possible when the VIP SSL feature is used with CPx.

Recommendations: For FortiOS versions 5.4.6 through 5.4.9, update to a version that fixes the TLS protocol implementation issue. For FortiOS versions 6.0.0 through 6.0.1, update to a version that fixes the TLS protocol implementation issue. As a temporary workaround, consider disabling the VIP SSL feature when using CPx until a patch is available.

Fix

Side Channel Attack

Weakness Enumeration

CWE-310

CWE-203

Related Identifiers

BDU:2018-01287

CVE-2018-9194

Affected Products

Fortios

References · 7

• https://fortiguard.com/advisory/FG-IR-17-302 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-9194 · Security Note
• https://osv.dev/vulnerability/CVE-2018-9194 · Vendor Advisory
• https://bdu.fstec.ru/vul/2018-01287 · Security Note
• https://kb.cert.org/vuls/id/144389 · Note
• https://fortiguard.com/psirt/FG-IR-17-302 · Note
• https://robotattack.org · Note