Explorar el Código

add nice pictures to presentation slides

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nitowa hace 10 meses
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fccf1b99c2

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SemSEpresentation/slides.pdf Ver fichero


+ 26
- 8
SemSEpresentation/slides.tex Ver fichero

@@ -27,6 +27,8 @@
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 \usepackage{booktabs}
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 \usepackage{url}
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 \usepackage{xcolor}
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+\usepackage{graphicx}
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+\graphicspath{ {./} }
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 \definecolor{codegreen}{rgb}{0,0.6,0}
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 \definecolor{codegray}{rgb}{0.5,0.5,0.5}
@@ -110,6 +112,22 @@
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   Examples follow, use in production at your own risk ;)
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 \end{frame}
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+\begin{frame}[fragile]
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+	\frametitle{Why this works}
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+	A dynamic array in storage slot $p$ stores its data at continuous addresses starting at $keccak(p)$. 
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+	
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+	For example, if the variable $x$ is a dynamic array occupying storage slot 3, $x[o]$ can be found at $keccak(0x3)+o$.
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+	
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+	An attacker can use this information to overwrite any storage slot by finding an appropriate offset value.
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+\end{frame}
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+
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+\begin{frame}[fragile]
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+	\frametitle{Why this works}
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+	
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+	\includegraphics[width=\textwidth]{storage}
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+	
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+\end{frame}
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+
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 \subsection[Examples]{Examples}
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 \begin{frame}[fragile]
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   \frametitle{Unchecked Array Write}
@@ -194,14 +212,7 @@ contract MyContract {
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 	\end{lstlisting}
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 \end{frame}
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-\begin{frame}[fragile]
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-	\frametitle{Why this works}
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-	A dynamic array in storage slot $p$ stores its data at continuous addresses starting at $keccak(p)$. 
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-	
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-	For example, if the variable $x$ is a dynamic array occupying storage slot 3, $x[o]$ can be found at $keccak(0x3)+o$.
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-	
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-	An attacker can use this information to overwrite any storage slot by finding an appropriate offset value.
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-\end{frame}
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+
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 \section{Detecting and Exploiting}
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 \subsection[Detecting SWC-124]{Detecting SWC-124}
@@ -234,6 +245,13 @@ contract MyContract {
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   \end{itemize}
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 \end{frame}
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+\begin{frame}[fragile]
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+	\texttt{\$ slither Bethorde.sol --print variable-order}
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+
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+	\includegraphics[width=\textwidth]{slither}
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+
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+\end{frame}
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+
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 \subsection[Exploiting SWC-124]{Exploiting SWC-124}
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 % TODO: Exploitation is trivial, should we just go back and explain or should we go into memory layout? Can we handle it in time?

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SemSEpresentation/slither.jpg Ver fichero


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SemSEpresentation/storage.jpg Ver fichero


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