Cross-site scripting in FortiOS SSLVPN Portal

1) Store cross-site scripting

EUVDB-ID: #VU46818

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15706

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 portal interface. A remote authenticated user can inject 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: 5.6.0 - 6.2.1

CPE2.3

• cpe:2.3:o:fortinet:fortios:6.2.1:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:5.6.12:*:*:*:*:*:*:*

External links

http://fortiguard.com/psirt/FG-IR-19-223

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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