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

Programming, We sell pdf''s from our site and pdfs can be ordered from the ...

We sell pdf''s from our site and pdfs can be ordered from the site by selecting a book, putting it in a shopping cart, then signing in with a password or as a guest, and then check

Normalize a vector, Normalize a vector Let's imagine we want  to norma...

Normalize a vector Let's imagine we want  to normalize a vector  of three  variables;  that  is to compute a new  vector  of three values,  such that its size  is 1. Here is o

Algorithm, given number isprime number or not

given number isprime number or not

Stuck on homework, There are three seating categories at a stadium. For a s...

There are three seating categories at a stadium. For a softball game, Class A seats cost $15, Class B seats cost $12, and Class C seats cost $9. Write a program that asks how many

Algorithm, for simple interest and compound interest

for simple interest and compound interest

Otway rees protocol implementation, I need server, client and trusted side ...

I need server, client and trusted side communicating and charging a service with that protocol (or needham shroeder)

Cps translator for python, Your task is to construct a translator from the ...

Your task is to construct a translator from the subset of Python in Project 3 intocontinuation-passing style (CPS). Of course, the expected way of accomplishing this is to trans

Question, Data array A has data series from 1,000,000 to 1 with step size 1...

Data array A has data series from 1,000,000 to 1 with step size 1, which is in perfect decreasing order. Data array B has data series from 1 to 1,000,000, which is in random order.

Coding examples of python, Coding examples Following are some  attempts...

Coding examples Following are some  attempts at defining a function isSubset,  which  takes  two  arguments, a and  b, and  returns True if a is a subset  of b, assuming that

Lost, Import the sample code below into the Python IDLE and enhance it, run...

Import the sample code below into the Python IDLE and enhance it, run it and debug it. Add features to make this a more realistic database tool by providing for easy data entry an

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