3. Consider the following C code fragment, which makes use of the strcpy version that truncates a copy after n bytes (i.e., strncpy): 1 int 2 main (int argc, char **arg v) 3 { return bar (argv [1]); 5 } 4 7 int 8 bar(char *arg) 9 { 11 char bar[512]; 12 13 if (sizeof ( bar) <= 512) strncpy (bar, arg, strlen (arg)); 14 15 exit (1); 16 17 } a. Does the program suffer from a memory corruption vulnerability? If not, explain the reasons. If yes, is it possible to successfully exploit this vulnerability? In other words, is it possible to provide specific input to such a program to take advantage of its vulnerability and thus execute arbitrary code (for instance, spawning a shell), on x86-32 architectures? If yes, explain how you would exploit it (high-level steps). If not, explain why and what you would change in the code to make it exploitable.

3. Consider the following C code fragment, which makes use of the strcpy version that truncates a copy after n bytes (i.e., strncpy): 1 int 2 main (int argc, char **arg v) 3 { return bar (argv [1]); 5 } 4 7 int 8 bar(char *arg) 9 { 11 char bar[512]; 12 13 if (sizeof ( bar) <= 512) strncpy (bar, arg, strlen (arg)); 14 15 exit (1); 16 17 } a. Does the program suffer from a memory corruption vulnerability? If not, explain the reasons. If yes, is it possible to successfully exploit this vulnerability? In other words, is it possible to provide specific input to such a program to take advantage of its vulnerability and thus execute arbitrary code (for instance, spawning a shell), on x86-32 architectures? If yes, explain how you would exploit it (high-level steps). If not, explain why and what you would change in the code to make it exploitable.

Name: 3. Consider the following C code fragment, which makes use of the str
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Description: 3. Consider the following C code fragment, which makes use of the strcpyversion that truncates a copy after n bytes (i.e., strncpy):1 int2 main (int argc, char **argv)3 {return bar(argv [1]);5 }47 int8 bar (char *arg)9 {1011char bar[512];12if (sizeo

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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