Improper Authentication in multiple NETGEAR Routers



Published: 2020-09-16

Security Advisory

This security advisory describes one low risk vulnerability.

1) Improper Authentication

Risk: Low

CVSSv3: 5.7 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-17409

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests within the "mini_httpd" service. A remote attacker on the local network can bypass authentication process and disclose stored credentials.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

R6020: -

R6080: -

R6120: -

R6220: -

R6230: -

R6260: -

R6330: -

R6350: -

R6850: -

WNR2020: -

JNR3210: -

CPE External links

https://www.zerodayinitiative.com/advisories/ZDI-20-1176/
https://kb.netgear.com/000062304/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-PSV-2020-0258

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).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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