CVE-2018-21142 Denial of service in n/a

Medium 4.5 Published 23 Apr 2020 Updated 5 Aug 2024

Attackers can cause a denial of service on various NETGEAR routers by exploiting a vulnerability in the device firmware.

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

What is CVE-2018-21142?

CVE-2018-21142 is a medium-severity denial of service vulnerability in Netgear R6100 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Certain NETGEAR devices are affected by denial of service. This affects R6100 before 1.0.1.22, R7500 before 1.0.0.122, R7800 before 1.0.2.42, R8900 before 1.0.3.10, R9000 before 1.0.3.10, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.54, WNDR4500v3 before 1.0.0.54, and WNR2000v5 before 1.0.0.64.

Which versions are affected by CVE-2018-21142?

It affects 9 products.

Products include Netgear R6100 Firmware, Netgear R7500 Firmware, Netgear R7800 Firmware, Netgear R8900 Firmware, Netgear R9000 Firmware, Netgear Wndr3700 Firmware and 3 more.

How do I fix CVE-2018-21142?

No fix has been published for CVE-2018-21142 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-21142 being exploited?

There is no known exploitation of CVE-2018-21142 in the wild and no public exploit code.

All Netgear R6100 Firmware vulnerabilities

Sources

Also known as GHSA-m65j-gqp9-9x58.