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

Basic-learning to program in python , Depending on your  previous programmi...

Depending on your  previous programming background, we use different sides  through the available readings:   If you have never programmed before: you should start with a

Variable, from urllib2 import urlopen var= ('' response">http://placekitt...

from urllib2 import urlopen var= ('' response">http://placekitten.com'') response = kittens.read(body) body = response[559:1000] print ''Kittens:'', response

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

Conditionals-for and while, For and While   If we want  to do some o...

For and While   If we want  to do some operation or set of operations various  times, we can handle the process  in several  different types.  The most straightforward types

Problem, an array A[0..n-1] of nr red elements, nw white elements and nb bl...

an array A[0..n-1] of nr red elements, nw white elements and nb blue elements in random order such that 0 = nr,nw,nb = n and nr + nw + nb = n, and arranging them such that all reds

Lcr circuit, program on damped lcr cicuit

program on damped lcr cicuit

List Assignment, Task This problem creates a list containing names. The li...

Task This problem creates a list containing names. The list of names will be printed, sorted, printed again in the new sorted order, written to a new output file, and searched. Ca

Procedures, In Python, the fundamental abstraction of a computation is as a...

In Python, the fundamental abstraction of a computation is as a procedure (other  books call them "functions" instead; we will end  up  using  both  values).   A function that  tak

Structured assignment, Structured assignment Once  we have  tuples and...

Structured assignment Once  we have  tuples and lists, we may use  a nice trick  in assignment expression, based  on the packing and unpacking of tuples. >>> a, b, c = 1, 2

Basics of python-introduction, Basics of python-introduction Python is...

Basics of python-introduction Python is designed for easy interaction between a user and the system. It goes with  an inter­ active function  known as  a shell or listener.  T

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