Remote code execution in FreePBX

1) Code injection

EUVDB-ID: #VU5362

Risk: Critical

CVSSv3.1: 9.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2014-7235

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to an error in the legacy FreePBX ARI Framework module/Asterisk Recording Interface (ARI). A remote attacker can bypass the authentication process and execute arbitrary code with administrative privileges.

Successful exploitation results in arbitrary code execution on the vulnerable system.

Note: this vulnerability was being actively exploited.

Mitigation

Update to version 2.12.0.5 or later.

Vulnerable software versions

FreePBX: 2.9.0.8 - 2.11.1.4

External links

http://community.freepbx.org/t/critical-freepbx-rce-vulnerability-all-versions-cve-2014-7235/24536

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, a fully functional exploit for this vulnerability is available.