CVE-2018-21173 Memory corruption in n/a

Medium 6.8 Published 27 Apr 2020 Updated 5 Aug 2024

Authenticated attackers can exploit a stack-based buffer overflow in NETGEAR routers to execute arbitrary code or escalate privileges.

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-2018-21173?

CVE-2018-21173 is a medium-severity memory corruption vulnerability in Netgear R7500 Firmware, published on 27 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 a stack-based buffer overflow by an authenticated user. This affects R7500 before 1.0.0.122, R7800 before 1.0.2.40, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.92, WNDR4300 before 1.0.2.94, WNDR4300v2 before 1.0.0.50, WNDR4500v3 before 1.0.0.50, and WNR2000v5 before 1.0.0.62.

Weakness: CWE-787

Which versions are affected by CVE-2018-21173?

It affects 7 products.

Products include Netgear R7500 Firmware, Netgear R7800 Firmware, Netgear R9000 Firmware, Netgear Wndr3700 Firmware, Netgear Wndr4300 Firmware, Netgear Wndr4500 Firmware and 1 more.

How do I fix CVE-2018-21173?

No fix has been published for CVE-2018-21173 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-21173 being exploited?

There is no known exploitation of CVE-2018-21173 in the wild and no public exploit code.

All Netgear R7500 Firmware vulnerabilities

Sources

Also known as GHSA-p466-mqmg-f6g5.