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authorMatt Strapp <matt@mattstrapp.net>2021-10-20 13:35:01 -0500
committerMatt Strapp <matt@mattstrapp.net>2021-10-20 13:35:01 -0500
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start Q3
Diffstat (limited to 'csci5271/hw2/ex2-template.tex')
-rw-r--r--csci5271/hw2/ex2-template.tex18
1 files changed, 5 insertions, 13 deletions
diff --git a/csci5271/hw2/ex2-template.tex b/csci5271/hw2/ex2-template.tex
index 96eca28..7d81f41 100644
--- a/csci5271/hw2/ex2-template.tex
+++ b/csci5271/hw2/ex2-template.tex
@@ -4,20 +4,9 @@
\begin{document}
\begin{center}
-CSci 5271 Fall 2021 Exercise Set 2 answers template
+CSci 5271 Fall 2021 Exercise Set 2 answers
\end{center}
-Please use this as a template for submitting your answers to
-exercise set 2. (This template is available from the course web site
-in either LaTeX or Google Doc formats). Type your answers on each page
-after the question prompt (you can use additional pages, though that
-we expect that would rarely be required). If you can write all your
-answers electronically, please do so and export to a PDF to submit.
-If you would prefer to hand-draw figures, you can also submit a scan.
-
-Please ensure that the names and UMN email addresses of all of your
-group members are recorded on Gradescope, and also confirm them below:
-
\vspace{10pt}
\begin{tabular}{|p{2.6in}|p{2.6in}|}\hline
@@ -37,7 +26,8 @@ Example input that causes a buffer overflow:
A list of invariants for the transform function:
\begin{itemize}
\item bp is increased by one for every opening brace or bracket and goes down by one for every closing brace or bracket. (this gets violated)
- \item
+ \item The brace/bracket level is equal to the number of opening braces or brackets respectively minus the number of closing brackets.
+ \item The rotation level is increased by 13 for every opening curly brace, resetting to 0 when equal to 26.
\end{itemize}
The change that needs to be made is to make sure that bp decrements when there is an opening curly brace regardless of the rotate amount.
@@ -53,6 +43,7 @@ This code is an example of a use-after-free exploit. The way this exploit works
\newpage
Question 3 (reference monitor without hardware support, 15 pts):
+One way to to implement a software reference monitor is to introduce Mandatory Access Control.
\newpage
@@ -65,4 +56,5 @@ The program also implies that the user running the program is actually the real
Question 5 (Multilevel-secure classification, 20 pts):
+
\end{document}