Command execution in NUUO NVRmini 2

1) OS command injection

EUVDB-ID: #VU16228

Risk: High

CVSSv3.1: 9.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:U/RC:C]

CVE-ID: CVE-2018-14933

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote authenticated attacker to execute arbitrary shell commands on the target system.

The vulnerability exists in upgrade_handle.php due to insufficient validation of user-supplied input. A remote authenticated attacker can send specially crafted requests to execute OS commands with root privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

NUUO originally tried to fix the vulnerability by enforcing authentication on upgrade_handle.php but this fix has been insufficient to address the vulnerability.

Vulnerable software versions

NUUO NVRmini 2: 3.0.0.63 - 3.9.1

External links

http://www.exploit-db.com/exploits/45070

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. However, a fully functional exploit for this vulnerability is available.