# Exploit Title: Joomla! Component AcySMS 3.5.0 CSV Macro Injection# Google Dork: N/A# Date: 22-03-2018################################# Exploit Author: Sureshbabu Narvaneni################################# 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-2018-91061. 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 3.5.1for 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 inand 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)