#VU74012 Hidden functionality in NETGEAR products - CVE-2022-38452

Vulnerability identifier: #VU74012

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-38452

CWE-ID: CWE-912

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RBR750
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBR840
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBR850
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBR860
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBRE950
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBRE960
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBS750
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBS840
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBS850
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBS860
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBSE950
Hardware solutions / Routers & switches, VoIP, GSM, etc
RBSE960
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: NETGEAR

Description

The vulnerability allows a remote user to compromise vulnerable system

The vulnerability exists due to hidden functionality (backdoor) is present in software within the hidden telnet service functionality. A remote administrator can use this functionality to gain full access to the application and execute arbitrary commands on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

RBR750: before 4.6.14.3

RBR840: before 4.6.14.3

RBR850: before 4.6.14.3

RBR860: before 7.2.4.5

RBRE950: before 6.3.7.10

RBRE960: before 6.3.7.10

RBS750: before 4.6.14.3

RBS840: before 4.6.14.3

RBS850: before 4.6.14.3

RBS860: before 7.2.4.5

RBSE950: before 6.3.7.10

RBSE960: before 6.3.7.10

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External links
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1595
https://kb.netgear.com/000065417/Security-Advisory-for-Command-Injection-on-Some-Orbi-WiFi-Systems-PSV-2022-0187

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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