User Account

All Pages

Common Vulnerabilities, Python Programming

Assignment Help:
1 Low Level Exploits
1.1 Savegames
Jimmy is becoming increasingly frustrated at the computer game hes playing.
He has a save right before the levels boss but he needs either more health
or more gold in order to win. The game is loaded from a normal file on disk
but the health and gold are encrypted in some complicated fashion. The
1
characters name is not, however.
1. Set the characters gold or health to a number greater than 9000 by
utilising a buffer overflow. How did you achieve this? Explain using
reference to bytes and ASCII as to what the exact value was that you
achieved. [4 marks]
2. How could this exploit be prevented? [2 marks]
3. Could this exploit be useful for more than just the game? Could it be
used to gain access to a system? If not, why not? If so, where might it
be used? [4 marks]
1.2 General Questions [11 marks]
1. Why is it necessary for us to provide the flag -fno-stack-protector to
GCC? What is a canary in terms of a buffer overflow and how can a
canary prevent a buffer overflow exploit? [4 marks]
2. If the game above was written in Java instead of C, would the savegame
still be exploitable? [2 marks]
3. Imagine you were exploiting a program that was running with escalated
privileges (i.e. could read sensitive files, modify other users settings and
so on) is it possible to obtain a BASH shell using buffer overflows? Be
sure to explain what shellcode is and how the shellcode is executed1
.
[5 marks]
2 SQL Exploits (10 marks)
1. Show how it is possible to log in as any user by performing an SQL
injection attack on the username/password login page. [2 marks]
2. The website has been clued in on their major security problem and prevented
the previous attack. Is it possible to use the status query to work
out the password of one of the administrators Bobby2
? [4 marks]
1The traditional introduction to this topic is Smashing The Stack For Fun And Profit:
https://www.phrack.com/issues.html?issue=49&id=14
2SQLite (the database in use here) doesnt allow multiple SQL statements to be executed
in a single execute query consider using substr and subqueries
2
3. How can these attacks be prevented? Is it a difficult security problem
to fix? Why is it so common? [4 marks]

Related Discussions:- Common Vulnerabilities

Re.sub, how to use re.sub to seperate distint words and phrases when transl...

how to use re.sub to seperate distint words and phrases when translating text from English to Spanish or vis versa in python programming

Variable, from urllib2 import urlopen # Open http://placekitten.com/ for...

from urllib2 import urlopen # Open http://placekitten.com/ for reading on line 4! response = kittens.read() body = response[559:1000] # Add your ''print'' statement here!

Random Geometric Graphs, Displaying random geometric graphs in an uniform s...

Displaying random geometric graphs in an uniform square, unit disk, dense rim unit disk, and uniform sphere

Expressions and assignment, Expressions and assignment We can think of...

Expressions and assignment We can think of most computer programs as performing some sort of transformation on data.  Our code may get as input the exam scores of everyone in

Modules, Modules As you start to write larger programs, you will want ...

Modules As you start to write larger programs, you will want  to save the function de?nitions in multiple ?les, collected together according to what  they  do.  So, for exampl

Interaction and debugging, We encourage you to adopt an interactive style o...

We encourage you to adopt an interactive style of debugging and programming. Use the Python shell a lot. Write short pieces of code and check them.  It is much  simpler to test the

Python programming, Suppose the cover price of a book is $24.95, but bookst...

Suppose the cover price of a book is $24.95, but bookstores get a 40% discount. Shipping costs $3 for the first copy and 75 cents for each additional copy. What is the total whol

#cmdprobs, #Why can''t I cd my Desktop? A minute ago I would open up cmd an...

#Why can''t I cd my Desktop? A minute ago I would open up cmd and it starts in C:\Users\myname but now it''s starting in C:\WINDOWS\system> and I don''t where I am or how to get ou

Three layer neural network to classify the two sets of 3-D d, 1. Use a thre...

1. Use a three layer neural network to classify the two sets of 3-D data set. You should generate 100 samples for each data set based on the following criteria: Data set 1: generat

Create a program to produce a business speak phrase, The goal of this exerc...

The goal of this exercise is to write a \business phrase" generator, which each time it is called produces lines of business speak, such as: It's time that we became uber-effici

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd