Hacking - The Art of Exploitation, 2nd Edition
Programming 107 else { for(i=0; i < user_pick; i++) printf("\t"); printf(" ^-- your pick\n"); } } // This function inputs wag ...
108 0x200 } } // This function is the Pick a Number game. // It returns -1 if the player doesn't have enough credits. int pick_a ...
Programming 109 j = i + 1; while(j < 16) { if(numbers[i] == numbers[j]) match = numbers[i]; j++; } } if(match != -1) { printf ...
110 0x200 invalid_choice = 1; while(invalid_choice) { // Loop until valid choice is made. printf("Would you like to:\n[c]hange y ...
Programming 111 -=-={ New Player Registration }=-=- Enter your name: Jon Erickson Welcome to the Game of Chance, Jon Erickson. Y ...
112 0x200 Would you like to play again? (y/n) n -=[ Game of Chance Menu ]=- 1 - Play the Pick a Number game 2 - Play the No Matc ...
Programming 113 [Name: Jon Erickson] [You have 170 credits] -> 4 ====================| HIGH SCORE |==================== You c ...
114 0x200 Play around with this program a little bit. The Find the Ace game is a demonstration of a principle of conditional pro ...
0x300 EXPLOITATION Program exploitation is a staple of hacking. As demon- strated in the previous chapter, a program is made up ...
116 0x300 A program can only do what it’s programmed to do, to the letter of the law. Unfortunately, what’s written doesn’t alwa ...
Exploitation 117 unencrypted services such as telnet, rsh, and rcp. However, there was an off- by-one error in the channel-alloc ...
118 0x300 don’t say exactly what their creators intended, and like a computer program exploit, these legal loopholes can be used ...
Exploitation 119 0x320 Buffer Overflows Buffer overflow vulnerabilities have been around since the early days of com- puters and ...
120 0x300 By now, you should be able to read the source code above and figure out what the program does. After compilation in th ...
Exploitation 121 Program crashes are annoying, but in the hands of a hacker they can become downright dangerous. A knowledgeable ...
122 0x300 reader@hacking:~/booksrc $ gcc exploit_notesearch.c reader@hacking:~/booksrc $ ./a.out [DEBUG] found a 34 byte note fo ...
Exploitation 123 methods. If either of these passwords is used, the function returns 1, which grants access. You should be able ...
124 0x300 11 if(strcmp(password_buffer, "brillig") == 0) 12 auth_flag = 1; 13 if(strcmp(password_buffer, "outgrabe") == 0) 14 au ...
Exploitation 125 (gdb) continue Continuing. Breakpoint 2, check_authentication (password=0xbffff9af 'A' <repeats 30 times> ...
126 0x300 auth_overflow2.c #include <stdio.h> #include <stdlib.h> #include <string.h> int check_authentication ...
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