Vulnerability identifier: #VU25450

Vulnerability risk: Low

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-2020-5524

CWE-ID: CWE-78

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Aterm WF1200CR
Hardware solutions / Routers & switches, VoIP, GSM, etc
Aterm WG1200CR
Hardware solutions / Routers & switches, VoIP, GSM, etc
Aterm WG2600HS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: NEC Corporation

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 who can access the UPnP function interface of the device may execute an arbitrary OS command with root privileges

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Aterm WF1200CR: 1.2.1

Aterm WG1200CR: 1.2.1

Aterm WG2600HS: 1.3.2

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External links
http://jvn.jp/en/jp/JVN25766797/index.html
http://jpn.nec.com/security-info/secinfo/nv20-005.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.