CVE-2020-10924 Memory corruption in R6700
Network-adjacent attackers can bypass authentication and execute arbitrary code as root via a stack-based buffer overflow in the UPnP 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-2020-10924?
CVE-2020-10924 is a high-severity memory corruption vulnerability in Netgear R6700 Firmware, published on 28 Jul 2020. 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 bypass authentication on affected installations of NETGEAR R6700 V1.0.4.84_10.0.58 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. The issue results from the lack of proper validation of 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-9643.
Weakness: CWE-121
Which versions are affected by CVE-2020-10924?
It affects 1 product.
Products include Netgear R6700 Firmware.
How do I fix CVE-2020-10924?
No fix has been published for CVE-2020-10924 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-2020-10924 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-10924 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Netgear R6700 Firmware
Sources
Also known as GHSA-j8cv-gf68-463p.