level 12 -> 13 [darkknight@localhost darkknight]$ cat bugbear.c /* The Lord of the BOF : The Fellowship of the BOF - bugbear - RTL1*/ #include #include main(int argc, char *argv[]){char buffer[40];int i; if(argc < 2){printf("argv error\n");exit(0);} if(argv[1][47] == '\xbf'){printf("stack betrayed you!!\n");exit(0);} strcpy(buffer, argv[1]); printf("%s\n", buffer);} 와 드디어 RTL 문제가 나왔군요.. 간단하게 시스템 함수와 환경변수를 이용해 .. 더보기 level 11 -> 12 [golem@localhost golem]$ cat darkknight.c /* The Lord of the BOF : The Fellowship of the BOF - darkknight - FPO*/ #include #include void problem_child(char *src){char buffer[40];strncpy(buffer, src, 41);printf("%s\n", buffer);} main(int argc, char *argv[]){if(argc 더보기 level 10 -> 11 [skeleton@localhost skeleton]$ lsgolem golem.c[skeleton@localhost skeleton]$ cat golem.c /* The Lord of the BOF : The Fellowship of the BOF - golem - stack destroyer*/ #include #include extern char **environ; main(int argc, char *argv[]){char buffer[40];int i; if(argc < 2){printf("argv error\n");exit(0);} if(argv[1][47] != '\xbf'){printf("stack is still your friend.\n");exit(0);} strcpy(buffer, .. 더보기 이전 1 ··· 15 16 17 18 19 20 21 ··· 27 다음
