Vulnerability identifier: #VU18104

Vulnerability risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-78

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
TP-Link SR20 Smart Home Router
Hardware solutions / Firmware

Vendor: TP-Link

Description

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

The vulnerability exists due to incorrect filtration of user-supplied input and absent authentication when processing TFPT requests . A remote unauthenticated attacker can send a specially crafted TFPT request to upload a file and an OS command to execute arbitrary command with root privileges on the affected device.

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

TP-Link SR20 Smart Home Router: V1_180518

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External links
http://twitter.com/mjg59
http://pastebin.com/GAzccR95

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

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.