Two vulnerabilities in FortiOS

Published: 2023-02-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-41334 CVE-2022-39948
CWE-ID	CWE-79 CWE-295
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	FortiOS Operating systems & Components / Operating system
Vendor	Fortinet, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU72350

Risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-41334

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via the "redir" parameter of the Login page when the "Sign in with FortiCloud" button is clicked. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiOS: 7.0.0 - 7.2.3

External links

http://fortiguard.com/psirt/FG-IR-22-224

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper Certificate Validation

EUVDB-ID: #VU72344

Risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-39948

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation when establishing secure connections with threat feed fabric connectors. A remote attacker can perform MitM attack on the communication channel between the affected device and remote servers hosting threat feeds.