NEW PERSP.ON COMP.CONCEPTS-PACKAGE
17th Edition
ISBN: 9781337761116
Author: Carey
Publisher: CENGAGE L
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Chapter 3.1, Problem 1QC
Program Plan Intro
To provide the style rule to display all hypertext links within a navigation as block elements with a gray background.
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123456
A ROP (Return-Oriented Programming) attack can be used to execute arbitrary
instructions by chaining together small pieces of code called "gadgets." Your goal is
to create a stack layout for a ROP attack that calls a function located at '0x4018bd3'.
Below is the assembly code for the function 'getbuf', which allocates 8 bytes of stack
space for a 'char' array. This array is then passed to the 'gets' function. Additionally,
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construct the stack layout.
Assembly for getbuf
1 getbuf:
sub
mov
$8, %rsp
%rsp, %rdi
call
gets
add
$8, %rsp
ret
#Allocate 8 bytes for buffer
#Load buffer address into %rdi
#Call gets with buffer
#Restore the stack pointer
#Return to caller
Stack
Layout
each
8-byte
(fill in
section)
Address
Value (8 bytes)
0x7fffffffdfc0
0x7fffffffdfb8
0x7fffffffdfb0
0x7fffffffdfa8
0x7fffffffdfa0
0x7fffffffdf98
0x7fffffffdf90
0x7fffffffdf88
Gadgets
Address Gadget
Ox4006a7 pop %rdi; ret
Ox4006a9…
Problem 1 [15 points]
The code below is buggy. Assume the code compiles. Briefly:
1). Identify the problem with the code (e.g., can access memory out of bounds) and
2). Suggest a solution (e.g., check the length).
Question 1
1 #define BLENGTH 5
2 int b[BLENGTH];
3 void copy_from_global_int_array_b (int n, int* dest) {
4
5 }
*dest = b[n];
==
Which statement regarding SGA_MAX_SIZE is true?
SGA_MAX_SIZE is modifiable after an instance is started, only when Automatic Memory Management is used.
SGA_MAX_SIZE is not dyamically modifiable.
SGA_MAX_SIZE is ignored when MEMORY_TARGET > 0.
SGA-MAX_SIZE must be specified when SGA_TARGET > 0
Chapter 3 Solutions
NEW PERSP.ON COMP.CONCEPTS-PACKAGE
Ch. 3.1 - Prob. 1QCCh. 3.1 - Prob. 2QCCh. 3.1 - Prob. 3QCCh. 3.1 - Prob. 4QCCh. 3.1 - Prob. 5QCCh. 3.1 - Prob. 6QCCh. 3.1 - Prob. 7QCCh. 3.1 - Prob. 8QCCh. 3.1 - Prob. 9QCCh. 3.2 - Prob. 1QC
Ch. 3.2 - Prob. 2QCCh. 3.2 - Prob. 3QCCh. 3.2 - Prob. 4QCCh. 3.2 - Prob. 5QCCh. 3.2 - Prob. 6QCCh. 3.2 - Prob. 7QCCh. 3.2 - Prob. 8QCCh. 3.2 - Prob. 9QCCh. 3.3 - Prob. 1QCCh. 3.3 - Prob. 2QCCh. 3.3 - Prob. 3QCCh. 3.3 - Prob. 4QCCh. 3.3 - Prob. 5QCCh. 3.3 - Prob. 6QCCh. 3.3 - Prob. 7QCCh. 3 - Prob. 1RACh. 3 - Prob. 2RACh. 3 - Prob. 3RACh. 3 - Prob. 4RACh. 3 - Prob. 5RACh. 3 - Prob. 6RACh. 3 - Prob. 7RACh. 3 - Prob. 8RACh. 3 - Prob. 9RACh. 3 - Prob. 10RACh. 3 - Prob. 11RACh. 3 - Prob. 12RACh. 3 - Prob. 13RACh. 3 - Prob. 14RACh. 3 - Prob. 15RACh. 3 - Prob. 16RACh. 3 - Prob. 1CP1Ch. 3 - Prob. 2CP1Ch. 3 - Prob. 3CP1Ch. 3 - Prob. 4CP1Ch. 3 - Prob. 5CP1Ch. 3 - Prob. 6CP1Ch. 3 - Prob. 7CP1Ch. 3 - Prob. 8CP1Ch. 3 - Prob. 9CP1Ch. 3 - Prob. 10CP1Ch. 3 - Prob. 11CP1Ch. 3 - Prob. 12CP1Ch. 3 - Prob. 13CP1Ch. 3 - Prob. 14CP1Ch. 3 - Prob. 15CP1Ch. 3 - Prob. 16CP1Ch. 3 - Prob. 17CP1Ch. 3 - Prob. 18CP1Ch. 3 - Prob. 19CP1Ch. 3 - Prob. 20CP1Ch. 3 - Prob. 1CP2Ch. 3 - Prob. 2CP2Ch. 3 - Prob. 3CP2Ch. 3 - Prob. 4CP2Ch. 3 - Prob. 5CP2Ch. 3 - Prob. 6CP2Ch. 3 - Prob. 7CP2Ch. 3 - Prob. 8CP2Ch. 3 - Prob. 9CP2Ch. 3 - Prob. 10CP2Ch. 3 - Prob. 11CP2Ch. 3 - Prob. 12CP2Ch. 3 - Prob. 13CP2Ch. 3 - Prob. 14CP2Ch. 3 - Prob. 15CP2Ch. 3 - Prob. 16CP2Ch. 3 - Prob. 17CP2Ch. 3 - Prob. 18CP2Ch. 3 - Prob. 19CP2Ch. 3 - Prob. 20CP2Ch. 3 - Prob. 1CP3Ch. 3 - Prob. 2CP3Ch. 3 - Prob. 3CP3Ch. 3 - Prob. 4CP3Ch. 3 - Prob. 5CP3Ch. 3 - Prob. 6CP3Ch. 3 - Prob. 7CP3Ch. 3 - Prob. 8CP3Ch. 3 - Prob. 9CP3Ch. 3 - Prob. 10CP3Ch. 3 - Prob. 11CP3Ch. 3 - Prob. 12CP3Ch. 3 - Prob. 13CP3Ch. 3 - Prob. 14CP3Ch. 3 - Prob. 1CP4Ch. 3 - Prob. 2CP4Ch. 3 - Prob. 3CP4Ch. 3 - Prob. 4CP4Ch. 3 - Prob. 5CP4Ch. 3 - Prob. 6CP4
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