SB2018120307 - Command execution in NUUO NVRmini 2

Description

This security bulletin contains information about 1 vulnerability.

1) OS command injection (CVE-ID: CVE-2018-15716)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/U:Amber

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 containing shell metacharacters in the uploaddir parameter for a writeuploaddir command to bypass the uploaddir filter and execute OS commands with root privileges.

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

Note: the vulnerability exists due to insufficient patch for CVE-2018-14933.

Remediation

Install update from vendor's website.

References

• https://www.tenable.com/security/research/tra-2018-41
• https://github.com/tenable/poc/tree/master/nuuo/nvrmini2/cve_2018_15716