Revise the code to place a malicious code (shellcode) at the end of "afile" and then store the shellcode on the stack to run.
Revise the code to place a malicious code (shellcode) at the end of "afile" and then store the shellcode on the stack to run.
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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Answer the given question with a proper explanation and step-by-step solution.
Please answer this C buffer overflow question
Transcribed Image Text:Revise the code to place a malicious code (shellcode) at the end of "afile" and then store
the shellcode on the stack to run.
![1 #include <stdlib.h>
2 #include <stdio.h>
3 #include <string.h>
5 int ssp(char *str)
6- {
7
8
9
10
char buffer[100];
strcpy(buffer, str);
return 1;
11 }
12
13 int main(int argc, char **argv)
14-{
25 }
26
char str[400];
FILE *afile;
15
16
17
18
afile = fopen("afile", "r");
19 fread(str, sizeof(char), 400, afile);
ssp(str);
20
21
22
23
24
printf("Returned Properly\n");
return 1;](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F15d7109e-469c-48b5-b6f5-906596388e95%2F965d7bd9-934b-4a59-922f-05112e550de3%2F1uo5jzg_processed.png&w=3840&q=75)
Transcribed Image Text:1 #include <stdlib.h>
2 #include <stdio.h>
3 #include <string.h>
5 int ssp(char *str)
6- {
7
8
9
10
char buffer[100];
strcpy(buffer, str);
return 1;
11 }
12
13 int main(int argc, char **argv)
14-{
25 }
26
char str[400];
FILE *afile;
15
16
17
18
afile = fopen("afile", "r");
19 fread(str, sizeof(char), 400, afile);
ssp(str);
20
21
22
23
24
printf("Returned Properly\n");
return 1;
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