Cleartext Transmission of Sensitive Information
The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a MitM attack. While the parental controls themselves are not enabled by default on the routers, the Circle update daemon, circled, is enabled by default. This daemon connects to Circle and NETGEAR to obtain version information and updates to the circled daemon and its filtering database. However, database updates from NETGEAR are unsigned and downloaded via cleartext HTTP. As such, an attacker with the ability to perform a MitM attack on the device can respond to circled update requests with a crafted, compressed database file, the extraction of which gives the attacker the ability to overwrite executable files with attacker-controlled code. This affects R6400v2 126.96.36.199, R6700 188.8.131.52, R6700v3 184.108.40.206, R6900 220.127.116.11, R6900P 18.104.22.168, R7000 22.214.171.124, R7000P 126.96.36.199, R7850 188.8.131.52, R7900 184.108.40.206, R8000 220.127.116.11, and RS400 18.104.22.168.
CWE-319 - Cleartext Transmission of Sensitive Information
The software transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.