Vulnerability identifier: #VU22207

Vulnerability risk: Medium

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16985

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FusionPBX
Server applications / SCADA systems

Vendor: FusionPBX

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in app\xml_cdr\xml_cdr_delete.php when processing base64-encoded file names. A remote authenticated user can pass a base64-encoded filename to the application and permanently delete arbitrary file on the system.

Mitigation
Install updates from vendor's repository.

Vulnerable software versions

FusionPBX: Master

---

External links
http://github.com/fusionpbx/fusionpbx/commit/284b0a91968f126fd6be0a486a84e065926905ca
http://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-path-traversal-1/
http://www.fusionpbx.com/app/tickets/ticket_edit.php?id=bee80ee5-8c44-4c13-9ebb-3424177aa8db

---

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.