OS Command Injection in TP-Link TL-WR840N EU

1) OS Command Injection

EUVDB-ID: #VU63774

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-29402

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 local attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to insecure protections for UART console. An attacker with physical access can 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

TL-WR840N EU: 5 - 6.20

External links

http://k4m1ll0.com/cve-tplink-tlwr840N-uart-shell.html

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

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.