漏洞挖掘 堆栈的溢出实践

#include <stdio.h>



#define PASSWORD "1234567"



int verify_password(char *password)

{

    int authenticated;

    char buffer[8];

    authenticated = strcmp(password,PASSWORD);

    strcpy(buffer,password);  //溢出就在这里

    return authenticated;

}



void main()

{

    int valid_flag =0;

    char password[1024];

    while(1)

    {

        printf("please input password:     ");

        scanf("%s",password);



        valid_flag = verify_password(password);



        if (valid_flag !=0)

        {

            printf("incorrect password!\n\n");

        }

        else

        {

            printf("Congratulation! You have passed the verification!\n");

            break;

        }

    }

    getchar(); 

}