XSS in SSL VPN web UI for FortiOS and FortiProxy

1) Cross-site scripting

EUVDB-ID: #VU93943

Risk: Low

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-2024-26006

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 in SSL VPN web UI. A remote attacker can trick the victim into bookmarking a malicious samba server, then opening the bookmark 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 updates from vendor's website.

Vulnerable software versions

FortiOS: 7.0.0 - 7.4.3

FortiProxy: 7.0.0 - 7.4.3

CPE2.3

• cpe:2.3:o:fortinet:fortios:7.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.2.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.13:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.4.3:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.2.9:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.0.16:*:*:*:*:*:*:*

External links

http://www.fortiguard.com/psirt/FG-IR-23-485

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.