Perform Stack Overflow -- 2

Modern OS tries to prevent basic stack overflow attacks. Please try to perform stack overflow for

the following program:

void execcmd(char *str) {

char buf[128];

strcpy(buf, str);



Please write in details:

• All the necessary (compiler and OS) options/configurations you need to do to make the attack

happen in a modern OS, 64 bit Ubuntu [login to view URL] LTS with its default GCC version; and

explain why you cannot perform the attacks without these options/configurations – namely,

how modern OS/compiler avoid such stack overflow attacks;

• Your attack input and effects; and draw the necessary call stacks (using the attack string

as input) to explain how such a string can perform the attack and the consequences of this


Please check the attached pdf for details.

Skills: Computer Security, Internet Security, Full Stack Development, SQL

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