Overview
- Description
- An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.
- Source
- psirt@fortinet.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
CVSS 2.0
- Type
- Primary
- Base score
- 7.5
- Impact score
- 6.4
- Exploitability score
- 10
- Vector string
- AV:N/AC:L/Au:N/C:P/I:P/A:P
Known exploits
Data from CISA
- Vulnerability name
- Fortinet FortiOS SSL VPN Improper Authentication Vulnerability
- Exploit added on
- Nov 3, 2021
- Exploit action due
- May 3, 2022
- Required action
- Apply updates per vendor instructions.
Weaknesses
- nvd@nist.gov
- CWE-178
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "756167D1-ED53-4EC7-88B3-D82E329A2FA4",
"versionEndExcluding": "6.0.10"
},
{
"criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BD0966DA-A4B1-4C78-862C-3CB9557DCC4C",
"versionEndExcluding": "6.2.4",
"versionStartIncluding": "6.2.0"
},
{
"criteria": "cpe:2.3:o:fortinet:fortios:6.4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1C6E45EB-4C8C-4777-9200-08B14595A3A7"
}
],
"operator": "OR"
}
]
}
]