Vulnerability identifier: #VU49683

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-2020-27872

CWE-ID: CWE-287

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
AC2100
Hardware solutions / Routers for home users
AC2400
Hardware solutions / Routers for home users
AC2600
Hardware solutions / Routers for home users
R6700v2
Hardware solutions / Routers for home users
R6800
Hardware solutions / Routers for home users
R6900v2
Hardware solutions / Routers for home users
R7200
Hardware solutions / Routers for home users
R7350
Hardware solutions / Routers for home users
R7400
Hardware solutions / Routers for home users
R7450
Hardware solutions / Routers for home users
R6220
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6230
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6260
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6330
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6350
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6850
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6120
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6020
Hardware solutions / Routers & switches, VoIP, GSM, etc
R6080
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor:

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to improper state tracking in the password recovery process within the "mini_httpd" service. A remote attacker on the local network can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.zerodayinitiative.com/advisories/ZDI-21-071/
http://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers

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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.