OS Command Injection in several Realtek products

1) OS Command Injection

EUVDB-ID: #VU58145

Risk: Medium

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-19824

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

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation in the sysCmd parameter to in boafrm/formSysCmd URI. A remote authenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

A3002RU: 2.0.0

A702R: 2.1.3

N301RT: 2.1.6

N302R: 3.4.0

N300RT: 3.4.0

N200RE: 4.0.0

N150RT: 3.4.0

N100RE: 3.4.0

External links

http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Execution.html
http://seclists.org/fulldisclosure/2020/Jan/36
http://seclists.org/fulldisclosure/2020/Jan/38
http://sploit.tech

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.