-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathUseAfterFree.c
More file actions
149 lines (121 loc) · 3.43 KB
/
Copy pathUseAfterFree.c
File metadata and controls
149 lines (121 loc) · 3.43 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
#include "UseAfterFree.h"
PUSE_AFTER_FREE g_pUseAfterFree = NULL;
VOID
UAFObjectCallback(VOID) { }
NTSTATUS
AllocateUAFObject(VOID)
{
NTSTATUS status = STATUS_SUCCESS;
PUSE_AFTER_FREE pUseAfterFree = NULL;
__try
{
pUseAfterFree = (PUSE_AFTER_FREE)ExAllocatePoolWithTag(
NonPagedPool,
sizeof(USE_AFTER_FREE),
'uafo'
);
if (NULL == pUseAfterFree)
{
goto _RET;
}
RtlFillMemory((PVOID)pUseAfterFree->chBuffer, sizeof(pUseAfterFree->chBuffer), 0x41);
pUseAfterFree->chBuffer[sizeof(pUseAfterFree->chBuffer) - 1] = 0x00;
pUseAfterFree->Callback = &UAFObjectCallback;
g_pUseAfterFree = pUseAfterFree;
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[Allocate Use After Free Object]\n");
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] UseAfterFree : %p\n", pUseAfterFree);
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] g_UseAfterFree : %p\n", g_pUseAfterFree);
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] UseAfterFree->Callback : %p\n\n", pUseAfterFree->Callback);
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
status = GetExceptionCode();
}
_RET:
return status;
}
NTSTATUS
CallUAFObject(VOID)
{
NTSTATUS status = STATUS_UNSUCCESSFUL;
__try
{
if (g_pUseAfterFree)
{
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[Call Use After Free Object]\n");
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] g_UseAfterFree : %p\n", g_pUseAfterFree);
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] UseAfterFree->Callback : %p\n\n", g_pUseAfterFree->Callback);
if (g_pUseAfterFree->Callback)
{
g_pUseAfterFree->Callback();
}
status = STATUS_SUCCESS;
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
status = GetExceptionCode();
}
return status;
}
NTSTATUS
FreeUAFObject(VOID)
{
NTSTATUS status = STATUS_UNSUCCESSFUL;
__try
{
if (g_pUseAfterFree)
{
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[Free Use After Free Object]\n");
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] Pool Tag : %d\n", STRINGIFY('uafo'));
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] Pool Chunk : %p\n\n", g_pUseAfterFree);
ExFreePoolWithTag((PVOID)g_pUseAfterFree, 'uafo');
//g_pUseAfterFree = NULL;
status = STATUS_SUCCESS;
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
status = GetExceptionCode();
}
return status;
}
NTSTATUS
UseAfterFreeHandler(
_In_ PIRP pIrp,
_In_ PIO_STACK_LOCATION pStackLocation
)
{
NTSTATUS status = STATUS_SUCCESS;
PVOID pvUserBuffer = NULL;
PUAF_FAKE_OBJECT pKernelFakeObject = NULL;
UNREFERENCED_PARAMETER(pIrp);
pvUserBuffer = (PVOID)pStackLocation->Parameters.DeviceIoControl.Type3InputBuffer;
if (NULL == pvUserBuffer)
{
goto _RET;
}
__try
{
pKernelFakeObject = (PUAF_FAKE_OBJECT)ExAllocatePoolWithTag(
NonPagedPool,
sizeof(UAF_FAKE_OBJECT),
'uafo'
);
if (NULL == pKernelFakeObject)
{
goto _RET;
}
ProbeForRead((PVOID)pvUserBuffer, sizeof(UAF_FAKE_OBJECT), (ULONG)__alignof(UAF_FAKE_OBJECT));
RtlCopyMemory((PVOID)pKernelFakeObject, (PVOID)pvUserBuffer, sizeof(UAF_FAKE_OBJECT));
pKernelFakeObject->chBuffer[sizeof(pKernelFakeObject->chBuffer) - 1] = '\0';
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[Fake Use After Free Object]\n");
//DbgPrintEx(DPFLTR_DEFAULT_ID, DPFLTR_ERROR_LEVEL, "[+] Fake Object : %p\n\n", pKernelFakeObject);
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
status = GetExceptionCode();
}
_RET:
return status;
}