Vulnerability identifier: #VU70083

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-2022-43443

CWE-ID: CWE-78

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
WSR-3200AX4S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-3200AX4B
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-A2533DHP2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-A2533DHP3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPL
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPL2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPLS
Hardware solutions / Routers & switches, VoIP, GSM, etc
WCR-1166DS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: BUFFALO INC.

Description

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

The vulnerability exists due to improper input validation. A remote attacker on the local network can pass specially crafted data to the application and execute arbitrary OS 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

WSR-3200AX4S: 1.26

WSR-3200AX4B: 1.25

WSR-2533DHP: 1.08

WSR-2533DHP2: 1.22

WSR-A2533DHP2: 1.22

WSR-2533DHP3: 1.26

WSR-A2533DHP3: 1.26

WSR-2533DHPL: 1.08

WSR-2533DHPL2: 1.03

WSR-2533DHPLS: 1.07

WCR-1166DS: 1.34

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External links
http://jvn.jp/en/vu/JVNVU97099584/index.html
http://www.buffalo.jp/news/detail/20221205-01.html

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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.