CVE-2021-34983 NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability

Medium 6.5 Published 7 May 2024 Updated 4 Aug 2024

Network-adjacent attackers can access system configuration and stored credentials without authentication on NETGEAR routers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-34983?

CVE-2021-34983 is a medium-severity missing authorization vulnerability in Netgear D6220 Firmware, published on 7 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13708.

Weakness: CWE-306

Which versions are affected by CVE-2021-34983?

It affects 52 products.

Products include Netgear D6220 Firmware, Netgear D6400 Firmware, Netgear D7000v2 Firmware, Netgear Dc112a Firmware, Netgear Dgn2200v4 Firmware, Netgear Ex3700 Firmware and 46 more.

How do I fix CVE-2021-34983?

No fix has been published for CVE-2021-34983 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-34983 being exploited?

There is no known exploitation of CVE-2021-34983 in the wild and no public exploit code.

All Netgear D6220 Firmware vulnerabilities

Sources

Also known as GHSA-2r4f-jfx8-mhm3.