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

Example of python code, Worked example 1   Let's examine what  happens...

Worked example 1   Let's examine what  happens when  we compute the following Python code:   def p(x, y): z = x*x - y return z + 1/z   >>> p(1.0, 2.0) -2.0

Range, Range Very frequently, we will want to iterate through a list o...

Range Very frequently, we will want to iterate through a list of integer values, often as indices.  Python gives a useful function, range, which gives lists of integers. It ma

Algorithm, given number isprime number or not

given number isprime number or not

Tower of Hanoi, Tower of Hanoi game that you can let a player to move discs...

Tower of Hanoi game that you can let a player to move discs between the towers using a mouse. Moreover, you are required to do the followings: •Graphically represent any state in t

#title.display of vanderwaals isotherm, draw the variation of pressure with...

draw the variation of pressure with volume of a real gas at temperatures lower than its critical temperature.also draw its surface of discontinuity

assignment 10, #question.Program 10 Assignment (Banking Objects – Savings/...

#question.Program 10 Assignment (Banking Objects – Savings/Checking Accounts) Create a program named 10.py that performs the following: Create a class named ChkAcct, and a class n

Graphing Data, #que Write a program that will take price data for stocks an...

#que Write a program that will take price data for stocks and print it graphically to the screen. Your program should begin by asking the user for the file name. It should then cre

Variables, Variables We cannot  go very far without variables. A variabl...

Variables We cannot  go very far without variables. A variable is a value related to a name that we can bind  to have a particular value  and  then  later use in an expression.

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

#Connect4, In English, specify a representation of the board game in Python...

In English, specify a representation of the board game in Python. The representation should capture the entire state of the game at one point in time. It may be helpful to first fi

Write Your Message!

Captcha
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!

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