Vulnerability identifier: #VU22485

Vulnerability 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-2019-18667

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
pfsense (FreeBSD port)
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Rubicon Communications

Description

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

The vulnerability exists in the "/usr/local/www/freeradius_view_config.php" file due to insufficient sanitization of user-supplied data when processing a filename. 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.

Note: This vulnerability affects freeradius3 package before 0.15.7_3 for pfSense on FreeBSD

Mitigation
Vendor recommends to update the freeradius3 package to version 0.15.7_3.

Vulnerable software versions

pfsense (FreeBSD port): 2.3.0 - 2.4.4_3

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External links
http://github.com/pfsense/FreeBSD-ports/commit/30b22b6b0db7b73732a5da346afca66dc244e02a

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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.