CVE-2021-34982 NETGEAR Multiple Routers httpd Stack-based Buffer Overflow Remote Code Execution Vulnerability
Network-adjacent attackers can execute arbitrary code as root on NETGEAR routers via a stack-based buffer overflow in the httpd service.
- 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-2021-34982?
CVE-2021-34982 is a high-severity memory corruption 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 Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code 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. When parsing the strings file, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
. Was ZDI-CAN-13709.
Which versions are affected by CVE-2021-34982?
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-2021-34982?
No fix has been published for CVE-2021-34982 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-2021-34982 being exploited?
There is no known exploitation of CVE-2021-34982 in the wild and no public exploit code.
Other vulnerabilities in Netgear D6220 Firmware
Sources
Also known as GHSA-3g79-p8hq-4qgp.