In BASETech GE-131 BT-1837836 firmware 20180921, the web-server on the system is configured with the option “DocumentRoot /etc“. This allows an attacker with network access to the web-server to download any files from the “/etc” folder without authentication. No path traversal sequences are needed to exploit this vulnerability.

A directory traversal vulnerability in BASETech GE-131 BT-1837836 firmware 20180921 allows unauthenticated remote attackers to gain access to sensitive information.