Missing Authentication for Critical Function
An issue was discovered in /bin/goahead on D-Link DIR-823G devices with firmware 1.02B03. There is incorrect access control allowing remote attackers to hijack the DNS service configuration of all clients in the WLAN, without authentication, via the SetWanSettings HNAP API.
CWE-306 - Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.