Vulnerability identifier: #VU60361

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-21173

CWE-ID: CWE-912

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
WRH-300BK3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300WH3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300BK3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300DR3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300LB3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300PN3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300WH3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WRH-300YG3-S
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: ELECOM CO. ,LTD.

Description

The vulnerability allows a remote attacker to compromise vulnerable system

The vulnerability exists due to hidden functionality (backdoor) is present in software. A remote attacker on the local network can use this functionality to execute arbitrary OS command on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WRH-300BK3: 1.05

WRH-300WH3: 1.05

WRH-300BK3-S: 1.05

WRH-300DR3-S: 1.05

WRH-300LB3-S: 1.05

WRH-300PN3-S: 1.05

WRH-300WH3-S: 1.05

WRH-300YG3-S: 1.05

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External links
http://jvn.jp/en/jp/JVN17482543/index.html
http://www.elecom.co.jp/news/security/20220208-02/

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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.