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"piSignage 2.6.4 - Directory Traversal"

Author

Exploit author

"JunYeong Ko"

Platform

Exploit platform

hardware

Release date

Exploit published date

2020-01-07

Download file

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# Exploit Title: piSignage 2.6.4 - Directory Traversal
# Date: 2019-11-13
# Exploit Author: JunYeong Ko
# Vendor Homepage: https://pisignage.com/
# Version:  piSignage before 2.6.4
# Tested on: piSignage before 2.6.4
# CVE : CVE-2019-20354

Summary:
The web application component of piSignage before 2.6.4 allows a remote attacker (authenticated as a low-privilege user) to download arbitrary files from the Raspberry Pi via api/settings/log?file=../ path traversal. In other words, this issue is in the player API for log download.

PoC:
1. Click the Log Download button at the bottom of the 'piSignage' administration page.
2. HTTP Packet is sent when the button is pressed.
3. Change the value of 'file' parameter to ../../../../../../../../../../etc/passwd.
4. You can see that the /etc/passwd file is read.

References:
https://github.com/colloqi/piSignage/issues/97
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Release Date Title Type Platform Author
2020-01-07 "piSignage 2.6.4 - Directory Traversal" webapps hardware "JunYeong Ko" 
import requests
response = requests.get('http://127.0.0.1:8181?format=json')

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