Remote code execution in ZenLoad Balancer

1) OS Command Injection

EUVDB-ID: #VU17356

Risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-7301

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 due to insufficient validation of user-supplied input. A remote authenticated attacker can inject arbitrary OS commands via shell metacharacters in the index.cgi?action=View_Cert certname parameter to execute arbitrary code with root privileges.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ZenLoad Balancer: 3.10.1

External links

http://code610.blogspot.com/2019/01/rce-in-zenload-balancer.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.