--- a/programs/C0.c	Tue Oct 08 02:22:53 2013 +0100
+++ b/programs/C0.c	Tue Oct 08 05:53:21 2013 +0100
@@ -17,7 +17,7 @@
 int main (int argc, char **argv)
 {
   foo("my string is too long !!!!! ");                  // all is normal
-  foo("my string is too long !!!!! \x10\x10\xc0\x42");  // overwrites my_float
+  //foo("my string is too long !!!!! \x10\x10\xc0\x42");  // overwrites my_float
   return 0;
 }
 

--- a/programs/C1.c	Tue Oct 08 02:22:53 2013 +0100
+++ b/programs/C1.c	Tue Oct 08 05:53:21 2013 +0100
@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-// for installation notes see C0.c
 
 void foo (char *bar)
 {
@@ -10,9 +9,7 @@
   char  buffer[28];        
 
   printf("my float value = %f\n", my_float);
-
-  strcpy(buffer, bar);  
- 
+  strcpy(buffer, bar);   
   printf("my float value = %f\n", my_float);
 }
  
@@ -21,7 +18,7 @@
   // only float overwritten
   foo("my string is too long !!!!! \x10\x10\xc0\x42"); 
   // also calls can_never_run
-  //foo("my string is too long !!!!! \x10\x10\xc0\x42\x90\x90\x90\x90\x55\x84\x04\x08"); 
+  foo("my string is too long !!!!! \x10\x10\xc0\x42\x90\x90\x90\x90\x55\x84\x04\x08"); 
   return 0;
 }
 

--- a/progs/C1.c	Tue Oct 08 02:22:53 2013 +0100
+++ b/progs/C1.c	Tue Oct 08 05:53:21 2013 +0100
@@ -1,6 +1,6 @@
 void foo (char *bar)
 {
-  float my_float = 10.5;    // in hex: \x41\x28\x00\x00
+  float my_float = 10.5;  // in hex: \x41\x28\x00\x00
   char  buffer[28];        
 
   printf("my float value = %f\n", my_float);

Binary file slides/slides03.pdf has changed

--- a/slides/slides03.tex	Tue Oct 08 02:22:53 2013 +0100
+++ b/slides/slides03.tex	Tue Oct 08 05:53:21 2013 +0100
@@ -162,17 +162,34 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \mode<presentation>{
 \begin{frame}[c]
+\frametitle{A Float Printed ``Twice''}
+
+{\lstset{language=Java}
+\footnotesize
+\lstinputlisting{../progs/C1.c}}
+
+\end{frame}}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\mode<presentation>{
+\begin{frame}[c]
 \frametitle{\begin{tabular}{c}The Problem\end{tabular}}
 
 \begin{itemize}
 \item The basic problem is that library routines in C look as follows:
+
 \begin{center}
-{\lstset{language=Java}\fontsize{8}{10}\selectfont%
-\texttt{\lstinputlisting{../progs/app5.c}}}
+{\lstset{language=Java}
+\footnotesize
+\lstinputlisting{../progs/app5.c}}
 \end{center}
+
 \item the resulting problems are often remotely exploitable 
-\item can be used to circumvents all access control
-(botnets for further attacks)
+\item can be used to circumvents all access control\\
+(for grooming botnets for further attacks)
 \end{itemize}
   
 \end{frame}}
@@ -196,22 +213,6 @@
 \end{frame}}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
-\begin{frame}[c]
-
-\small
-\texttt{my\_float} is printed twice:\bigskip
-
-{\lstset{language=Java}\fontsize{8}{10}\selectfont%
-\texttt{\lstinputlisting{../progs/C1.c}}}
-
-  
-\end{frame}}
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
-
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \mode<presentation>{
 \begin{frame}[c]
@@ -257,7 +258,7 @@
 \frametitle{\begin{tabular}{c}Payloads\end{tabular}}
 
 \begin{itemize}
-\item the idea is you store some code as part to the buffer
+\item the idea is you store some code to the buffer
 \item you then override the return address to execute this payload\medskip
 \item normally you start a root-shell\pause
 \item difficulty is to guess the right place where to ``jump''
@@ -279,7 +280,7 @@
 \end{center}
 \end{itemize}\bigskip\bigskip
   
-{\lstset{language=Java}\fontsize{8}{10}\selectfont%
+{\lstset{language=Java}\small
 \texttt{\lstinputlisting{../progs/app5.c}}}
   
 \end{frame}}
@@ -305,7 +306,7 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \mode<presentation>{
 \begin{frame}[c]
-\frametitle{\begin{tabular}{c}Protections against BO Attacks\end{tabular}}
+\frametitle{\begin{tabular}{c}Protections against\\ BO Attacks\end{tabular}}
 
 \begin{itemize}
 \item use safe library functions