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< title > Introduction to SQL Injection< / title >
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< body >
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< div class = "slides" >
< section id = "title-slide" >
< h1 class = "title" > Introduction to SQL Injection< / h1 >
< p class = "author" > Stefan Friese< / p >
< p class = "date" > 11 April, 2024< / p >
< / section >
< section id = "topics" class = "slide level1" >
< h1 > Topics< / h1 >
< ul >
< li class = "fragment" > How an SQL Injection is Created< / li >
< li class = "fragment" > How to Exploit an SQL Injection< / li >
< li class = "fragment" > SPOILER: How to Prevent an SQL Injection in the
Next Presentation< / li >
< / ul >
< / section >
< section class = "slide level1" >
< h2 id = "how-does-it-happen" > How Does it Happen< / h2 >
< p > An SQL injection occurs when two things come together.< / p >
< / section >
< section class = "slide level1" >
< h3 id = "number-1" > Number 1< / h3 >
< p > An SQL Query as a string embedded in other languages< / p >
< div class = "sourceCode" id = "cb1" > < pre
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class="sourceCode python">< code class = "sourceCode python" > < span id = "cb1-1" > < a href = "#cb1-1" aria-hidden = "true" tabindex = "-1" > < / a > sql_query < span class = "op" > =< / span > < / span >
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< span id = "cb1-2" > < a href = "#cb1-2" aria-hidden = "true" tabindex = "-1" > < / a > cursor.execute(< / span >
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< span id = "cb1-3" > < a href = "#cb1-3" aria-hidden = "true" tabindex = "-1" > < / a > < span class = "st" > " SELECT * FROM user_data where username = ' admin' and password = ' s3cur3P4ssw0rd' " < / span > < / span >
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< span id = "cb1-4" > < a href = "#cb1-4" aria-hidden = "true" tabindex = "-1" > < / a > )< / span > < / code > < / pre > < / div >
< / section >
< section class = "slide level1" >
< h3 id = "number-2" > Number 2< / h3 >
< p > User input is possible as a part of said SQL query< / p >
< div class = "sourceCode" id = "cb2" > < pre
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class="sourceCode python">< code class = "sourceCode python" > < span id = "cb2-1" > < a href = "#cb2-1" aria-hidden = "true" tabindex = "-1" > < / a > sql_query < span class = "op" > =< / span > < / span >
< span id = "cb2-2" > < a href = "#cb2-2" aria-hidden = "true" tabindex = "-1" > < / a > cursor.execute(< / span >
< span id = "cb2-3" > < a href = "#cb2-3" aria-hidden = "true" tabindex = "-1" > < / a > < span class = "st" > " SELECT * FROM user_data where username = ' < / span > < span class = "sc" > %s< / span > < span class = "st" > ' and password = ' < / span > < span class = "sc" > %s< / span > < span class = "st" > ' " < / span > ,< / span >
< span id = "cb2-4" > < a href = "#cb2-4" aria-hidden = "true" tabindex = "-1" > < / a > < span class = "op" > %< / span > (username, password)< / span >
< span id = "cb2-5" > < a href = "#cb2-5" aria-hidden = "true" tabindex = "-1" > < / a > )< / span > < / code > < / pre > < / div >
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< / section >
< section class = "slide level1" >
< h2 id = "how-to-exploit-an-sql-injection" > How to Exploit an SQL
Injection< / h2 >
< ul >
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< li class = "fragment" > Close the string through an ending quote< / li >
< li class = "fragment" > Continue the query with your own SQL code< / li >
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< / ul >
< / section >
< section id = "the-end" class = "slide level1" >
< h1 > The End< / h1 >
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< p > < img src = "./images/exploits_of_a_mom.png" alt = "Convoluted Code" width = "50%" height = "auto%" > < / p >
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