mirror of
https://github.com/The-Art-of-Hacking/h4cker
synced 2024-11-25 12:20:18 +00:00
33 lines
990 B
C
33 lines
990 B
C
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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int main(int argc, char *argv[])
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{
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// Reserve 5 byte of buffer plus the terminating NULL.
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// should allocate 8 bytes = 2 double words,
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// To overflow, need more than 8 bytes...
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char buffer[5]; // If more than 8 characters input
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// by user, there will be access
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// violation, segmentation fault
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// a prompt how to execute the program...
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if (argc < 2)
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{
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printf("strcpy() NOT executed....\n");
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printf("Syntax: %s <characters>\n", argv[0]);
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exit(0);
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}
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// copy the user input to mybuffer, without any
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// bound checking a secure version is srtcpy_s()
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strcpy(buffer, argv[1]);
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printf("buffer content= %s\n", buffer);
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// you may want to try strcpy_s()
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printf("strcpy() executed...\n");
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return 0;
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}
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