Vulnerability identifier: #VU56357

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39279

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WAC-2004
Hardware solutions / Firmware
WAC-1001
Hardware solutions / Firmware
WAC-1001-T
Hardware solutions / Firmware
OnCell G3470A-LTE-EU
Hardware solutions / Firmware
OnCell G3470A-LTE-EU-T
Hardware solutions / Firmware
TAP-323-EU-CT-T
Hardware solutions / Firmware
TAP-323-US-CT-T
Hardware solutions / Firmware
TAP-323-JP-CT-T
Hardware solutions / Firmware
WDR-3124A-EU
Hardware solutions / Firmware
WDR-3124A-EU-T
Hardware solutions / Firmware
WDR-3124A-US
Hardware solutions / Firmware
WDR-3124A-US-T
Hardware solutions / Firmware

Vendor: Moxa

Description

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

The vulnerability exists due to improper input validation. A remote authenticated attacker can send a specially crafted HTTP GET request to the "/forms/web_importTFTP" CGI program and execute arbitrary commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WAC-2004: 1.7

WAC-1001: 2.1

WAC-1001-T: 2.1

OnCell G3470A-LTE-EU: 1.7

OnCell G3470A-LTE-EU-T: 1.7

TAP-323-EU-CT-T: 1.3

TAP-323-US-CT-T: 1.3

TAP-323-JP-CT-T: 1.3

WDR-3124A-EU: 2.3

WDR-3124A-EU-T: 2.3

WDR-3124A-US: 2.3

WDR-3124A-US-T: 2.3

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External links
http://sec-consult.com/vulnerability-lab/advisory/multiple-vulnerabilities-in-moxa-devices/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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