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

Common Vulnerabilities, 1 Low Level Exploits 1.1 Savegames Jimmy is becomi...

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

Small Viruses, I need how to write small kind of viruses...

I need how to write small kind of viruses...

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

#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

Lists, simple program using list

simple program using list

Perimeter of a polygon, Perimeter of a polygon Now, let's consider the...

Perimeter of a polygon Now, let's consider the problem of computing the length  of the perimeter of a polygon. The input is a structure of vertices,  encoded as a list of list

Work with functions, inputWithinRange (prompt, lowValue, highValue) This fu...

inputWithinRange (prompt, lowValue, highValue) This function will ask for a number using the prompt parameter. The function will only return a value that is within the inclusive ra

Lab programming, protocol rdt2.2 considers there is a bit errors between se...

protocol rdt2.2 considers there is a bit errors between sender to receiver and also from receiver to sender. So now we have to consider checking bit errors introduced in reply from

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

Graphing data, Write a program that will take price data for stocks and pri...

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 create a

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