Add citation for images
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@ -51,6 +51,14 @@ year={2007}
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urldate = {2022-09-28},
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}
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@unpublished{spg,
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Author = {Skornia, Christoph},
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Institution = {OTH Regensburg},
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Howpublished = {University Lecture},
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Year = {2021},
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Title = {Secure Programming --- Input Validation},
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}
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@misc{directoryStructure,
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title = {Classic SysAdmin: The Linux Filesystem Explained},
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Institution = {The Linux Foundation},
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61
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61
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@ -120,23 +120,31 @@
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\section{Stack Layout, Execution Flow}
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\begin{frame}
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\frametitle{Stack Layout}
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\includegraphics[width=.30\textwidth]{stack.png}
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\frametitle{Stack Layout}
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\begin{figure}
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\centering
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\includegraphics[width=.25\textwidth]{stack.png}
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\caption{Stack Layout~\cite{spg}}
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\end{figure}
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\end{frame}
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\begin{frame}
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\frametitle{Stack Layout}
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\includegraphics[width=.60\textwidth]{stack_overflow.png}
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\frametitle{Stack Layout}
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\begin{figure}
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\centering
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\includegraphics[width=.60\textwidth]{stack_overflow.png}
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\caption{Buffer Overflow~\cite{spg}}
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\end{figure}
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\end{frame}
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\begin{frame}
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\frametitle{Execution Flow}
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\begin{itemize}
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\item Beim Aufruf einer Funktion, aktuelle Adresse auf Stack
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\item \emph{\Ac{ip}} auf Adresse der aufgerufenen Funktion
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\item Bei \mintinline{c}{return}, Stack Frame wiederherstellen, Adresse von Stack in \emph{\Ac{ip}}
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\item Was wenn die Adresse auf dem Stack überschrieben wurde?
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\end{itemize}
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\frametitle{Execution Flow}
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\begin{itemize}
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\item Beim Aufruf einer Funktion, aktuelle Adresse auf Stack
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\item \emph{\Ac{ip}} auf Adresse der aufgerufenen Funktion
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\item Bei \mintinline{c}{return}, Stack Frame wiederherstellen, Adresse von Stack in \emph{\Ac{ip}}
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\item Was wenn die Adresse auf dem Stack überschrieben wurde?
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\end{itemize}
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\end{frame}
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\section{Exkurs: Shellcode}
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@ -153,34 +161,33 @@
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\item \url{https://www.exploit-db.com/shellcodes}
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\end{itemize}
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\end{itemize}
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% \frametitle{Exkurs: Shellcode}
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\end{frame}
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\section{Exploitation}
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\begin{frame}
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\frametitle{Code Execution}
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\begin{itemize}
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\item Shellcode im Speicher plazieren
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\item Buffer überschreiben
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\item \emph{\Ac{ip}} überschreiben
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\item \emph{\Ac{ip}} auf Shellcode zeigen lassen
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\end{itemize}
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\frametitle{Code Execution}
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\begin{itemize}
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\item Shellcode im Speicher plazieren
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\item Buffer überschreiben
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\item \emph{\Ac{ip}} überschreiben
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\item \emph{\Ac{ip}} auf Shellcode zeigen lassen
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\end{itemize}
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\end{frame}
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\section{Aktuelles Beispiel}
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\begin{frame}
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\frametitle{Beispiel in freier Wildbahn}
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\begin{description}
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\item[\emph{Chromium}] Heap Buffer Overflown WebGPU: \emph{CVE-2022-1483}~\cite{CVE-2022-1483}
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\item[\emph{Linux Kernel}] Heap Buffer Overflow durch Integer Overflow: \emph{CVE-2022-39842}~\cite{CVE-2022-39842}
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\item[\emph{MPlayer}] Buffer Overflow beim lesen von AVI und MPEG Headern: \emph{CVE-2022-38866}~\cite{CVE-2022-38866}, \emph{CVE-2022-38864}~\cite{CVE-2022-38864}
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\item[\emph{GNU Binutils}] Heap Buffer Overflow in \emph{strip}: \emph{CVE-2022-38533}~\cite{CVE-2022-38533}
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\end{description}
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\frametitle{Beispiel in freier Wildbahn}
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\begin{description}
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\item[\emph{Chromium}] Heap Buffer Overflown WebGPU: \emph{CVE-2022-1483}~\cite{CVE-2022-1483}
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\item[\emph{Linux Kernel}] Heap Buffer Overflow durch Integer Overflow: \emph{CVE-2022-39842}~\cite{CVE-2022-39842}
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\item[\emph{MPlayer}] Buffer Overflow beim lesen von AVI und MPEG Headern: \emph{CVE-2022-38866}~\cite{CVE-2022-38866}, \emph{CVE-2022-38864}~\cite{CVE-2022-38864}
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\item[\emph{GNU Binutils}] Heap Buffer Overflow in \emph{strip}: \emph{CVE-2022-38533}~\cite{CVE-2022-38533}
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\end{description}
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\end{frame}
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\section{Aktuelle Situation}
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\begin{frame}
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\frametitle{Migrationen}
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\frametitle{Migrationen}
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\begin{itemize}
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\item \Ac{aslr}
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\item \emph{w\^{}x} Memory
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