# Exploit Title: Joomla! Component AcySMS 3.5.0 CSV Macro Injection
# Google Dork: N/A
# Date: 22-03-2018
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# Exploit Author: Sureshbabu Narvaneni
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# Vendor Homepage: https://www.acyba.com
# Software Link: https://extensions.joomla.org/extensions/extension/communication/phone-a-sms/acysms/
# Affected Version: 3.5.0
# Category: WebApps
# Tested on: Ubuntu 14.04 x86_64/Kali Linux 4.12 i686
# CVE : CVE-2018-9106
 
1. Vendor Description:
 
AcySMS is a component which enables you to send follow-up campaigns,
auto-responders, newsletters, promotions, special offers, automated
messages... via SMS/Text Messages.
 
2. Technical Description:
 
CSV Injection (aka Excel Macro Injection or Formula Injection) exists in
the export feature in the Acyba AcySMS extension before 3.5.1 for Joomla!
via a value that is mishandled in a CSV export.
 
3. Proof Of Concept:
 
Login as low privileged user who is having access to AcySMS Component.
Rename user name as @SUM(1+1)*cmd|' /C calc'!A0.
 
When high privileged user logged in and exported user data then the CSV
Formula gets executed and calculator will get popped in his machine.
 
4. Solution:
 
Upgrade to version 3.5.1
https://extensions.joomla.org/extensions/extension/communication/phone-a-sms/acysms/
 
 
5. Reference:
 
https://vel.joomla.org/articles/2140-introducing-csv-injection
https://github.com/MrR3boot/CVE-Hunting/blob/master/AcySMS-CSV.mp4
 
 
 
Sureshbabu Narvaneni,
Security Analyst | Bug Hunter,
HackerOne (mrreboot/mrr3boot) | BugCrowd (Mr_R3boot)