A flawed implementation of the Home Network Administration Protocol (HNAP) reportedly allows attackers to gain unauthorised admin access to numerous D-Link router models
SourceSec Security research webpages claims finding a flaw in D-Link’s CAPTCHA implementation, around a way to view and edit D-Link router settings without any administrative credentials.
Simply said, D-Link routers have a second administrative interface, which uses the Home Network Administration Protocol. While HNAP does require basic authentication, the mere existence of HNAP on D-Link routers allows attackers and malware to bypass CAPTCHA “security”. Further, HNAP authentication is not properly implemented, allowing anyone to view and edit administrative settings on the router.
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