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Remote command execution in TP-Link SR20 Smart Home Router



Published: 2019-04-01
Severity Medium
Patch available NO
Number of vulnerabilities 1
CVE ID N/A
CWE ID CWE-78
Exploitation vector Local network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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TP-Link SR20 Smart Home Router
Hardware solutions / Firmware

Vendor TP-Link

Security Advisory

This security advisory describes one medium risk vulnerability.

1) OS Command Injection

Severity: Medium

CVSSv3: 8.3 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C] [PCI]

CVE-ID: N/A

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

Exploit availability: Yes [Search exploit]

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

CPE External links

https://twitter.com/mjg59
https://pastebin.com/GAzccR95

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.