PT-2017-3717 · Fortinet · Fortios

Published 2017-12-12 · Updated 2019-10-03 · CVE-2018-9192

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: A potential issue exists where an attacker could recover plaintext from encrypted messages or perform a Man-in-the-middle (MiTM) attack on RSA PKCS #1 v1.5 encryption without needing the server's private key. This issue arises under the SSL Deep Inspection feature when CPx is being used, potentially allowing a remote attacker to decrypt messages without knowledge of the secret key and perform a MiTM attack.

Recommendations: For FortiOS versions 5.4.6 through 5.4.9, consider disabling the SSL Deep Inspection feature until a patch is available. For FortiOS versions 6.0.0 through 6.0.1, consider disabling the SSL Deep Inspection feature until a patch is available. As a temporary workaround, restrict the use of the CPx feature to minimize the risk of exploitation.

Fix

Side Channel Attack

Weakness Enumeration

CWE-310

CWE-203

Related Identifiers

BDU:2018-01288

CVE-2018-9192

Affected Products

Fortios

References · 7

• https://fortiguard.com/advisory/FG-IR-17-302 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-9192 · Vendor Advisory
• https://bdu.fstec.ru/vul/2018-01288 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-9192 · Security Note
• https://kb.cert.org/vuls/id/144389 · Note
• https://fortiguard.com/psirt/FG-IR-17-302 · Note
• https://robotattack.org · Note