Vulnerability identifier: #VU35868

Vulnerability risk: Low

CVSSv3.1: 5.8 [AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-12347

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
pfsense
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Rubicon Communications

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. A remote attacker can permanently 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
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

pfsense: 2.4.4

---

External links
http://packetstormsecurity.com/files/153112/pfSense-2.4.4-p3-Cross-Site-Scripting.html
http://ctrsec.io/index.php/2019/05/28/stored-xss-acme-pfsense-2-4-4-p3/
http://github.com/pfsense/FreeBSD-ports/commit/504909564079e540689dbdbed3a579483c614275
http://redmine.pfsense.org/issues/9554#change-40729
http://www.pfsense.org/download/

---

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. However, proof of concept for this vulnerability is available.