Vulnerability · Published Apr 26, 2021 · Assigned by mitre
CVE-2021-31802
High 8.8
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 14.2% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit.
Official description
NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable from the local network without authentication. The vulnerability exists within the handling of an HTTP request. An attacker can leverage this to execute code as root. The problem is that a user-provided length value is trusted during a backup.cgi file upload. The attacker must add a \n before the Content-Length header.
Affected products (as reported)
References
- https://www.netgear.com/about/security/ x_refsource_MISC
- https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/ x_refsource_MISC