CVE Vulnerabilities

CVE-2020-7043

Improper Certificate Validation

Published: Feb 27, 2020 | Modified: Nov 07, 2023
CVSS 3.x
9.1
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.x
6.4 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL before 1.0.2. tunnel.c mishandles certificate validation because hostname comparisons do not consider 0 characters, as demonstrated by a good.example.comx00evil.example.com attack.

Weakness

The product does not validate, or incorrectly validates, a certificate.

Affected Software

Name Vendor Start Version End Version
Openfortivpn Openfortivpn_project * 1.12.0 (excluding)
Openfortivpn Ubuntu bionic *
Openfortivpn Ubuntu eoan *
Openfortivpn Ubuntu trusty *
Openfortivpn Ubuntu upstream *

Potential Mitigations

References