CVE-2021-34980 Memory corruption in R6260
Network-adjacent attackers can execute arbitrary code as root on NETGEAR R6260 routers via a stack buffer overflow in setupwizard.cgi.
- 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-2021-34980?
CVE-2021-34980 is a high-severity memory corruption vulnerability in Netgear R6260 Firmware, published on 13 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 1.1.0.78_1.0.1 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the setupwizard.cgi page. When parsing the SOAP_LOGIN_TOKEN environment variable, 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-14107.
Which versions are affected by CVE-2021-34980?
It affects 1 product.
Products include Netgear R6260 Firmware.
How do I fix CVE-2021-34980?
No fix has been published for CVE-2021-34980 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-2021-34980 being exploited?
There is no known exploitation of CVE-2021-34980 in the wild and no public exploit code.
Other vulnerabilities in Netgear R6260 Firmware
Sources
Also known as GHSA-65c2-8xvq-gj7j.