CVE-2018-21203 Memory corruption in n/a
Unauthenticated attackers can execute arbitrary code via a stack-based buffer overflow in 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-2018-21203?
CVE-2018-21203 is a high-severity memory corruption vulnerability in Netgear R6100 Firmware, published on 28 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 unauthenticated attacker. This affects R6100 before 1.0.1.20, R9000 before 1.0.2.52, WNDR3700v4 before 1.0.2.96, WNDR4300 before 1.0.2.98, WNDR4300v2 before 1.0.0.50, and WNDR4500v3 before 1.0.0.50.
Weakness: CWE-787
Which versions are affected by CVE-2018-21203?
It affects 5 products.
Products include Netgear R6100 Firmware, Netgear R9000 Firmware, Netgear Wndr3700 Firmware, Netgear Wndr4300 Firmware, Netgear Wndr4500 Firmware.
How do I fix CVE-2018-21203?
No fix has been published for CVE-2018-21203 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-2018-21203 being exploited?
There is no known exploitation of CVE-2018-21203 in the wild and no public exploit code.
Other vulnerabilities in Netgear R6100 Firmware
Sources
Also known as GHSA-wwpp-2rgq-6wcx.