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

Tuples and strings, Tuples  and strings Python has two different more...

Tuples  and strings Python has two different more list-like data  types  that are very important to understand.A tuple  is a structure that  is like a list, but  is not  mutab

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

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

Python implementation of a solver for the desert crossing, Assume you have ...

Assume you have a truck which has to travel across a desert from the base camp at position 0 (left) to the target camp at position 4 (right). The intermediate positions 1,2, and 3

Indentation and line breaks, Every programming language has to have  some m...

Every programming language has to have  some method for indicating grouping of operations. Here is how you execute an if-then-else structure in Java:   if (s == 1){ s = s

Environments in python, Environments in Python Generally, Python estab...

Environments in Python Generally, Python establishes the following binding environments: 1.  builtin     : the mother of all environments: it contains the de?nitions of

Homework Assignment #4, Finally! After years of adding unimportant sports,...

Finally! After years of adding unimportant sports, the IOC has finally added Shoe Tying to the Olympics. And you’ve been selected to write the software to handle the judging of t

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

Iteration over lists, What if you had a list of integer values, and you nee...

What if you had a list of integer values, and you need to add  them  up and give the sum?  Here are a number of different types of doing  it. First,  here  is a type in a style

corse information, write a program that creates s dictionary containing co...

write a program that creates s dictionary containing course

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