AVTECH IP Camera / NVR / DVR Devices – Authentication Bypass

Details of BNVL-2018-0073

What does the BNVL label mean?

BitNinja Server Security’s BNVL identifiers are intended for use to identify publicly known information security vulnerabilities in publicly released software packages. This project was designed to collect and analyze attack information from the BitNinja network after cluster analysis by the AI-powered Attack Vector Miner. More than 100 vulnerability types have been discovered with this project so far, so we decided to publish this platform to help to keep Linux server owners up-to-date.

Important! All listed BNVL vulnerabilities are protected by BitNinja PRO, so please check your configurations if your infrastructure is affected by any of them.

Syntax for BNVL labels:

BNVL prefix + Year + Arbitrary Digits

Name : 
AVTECH IP Camera / NVR / DVR Devices – Authentication Bypass
Related Links: https://www.exploit-db.com/exploits/40500/



Video player plugins are stored as .cab files in the web root, which can be accessed and downloaded without authentication. The cab file request verification in the streamd web server is performed with the strstr
function, which means that a request should not be authenticated if it contains the ô.cabö string anywhere in the URL. We note that some of the models contain an additional check in the CgiDaemon, which allows
unauthenticated cgi access only under the /cgi-bin/nobody folder.

Pattern: /cgi-bin/user/Config.cgi?.cab&action=get&category=Account.*