ModSecurity and Logging

A presentation at DevOpsDays Poznan in May 2019 in Poznań, Poland by Philipp Krenn

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ModSecurity and Logging Philipp Krenn @xeraa @xeraa

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Let’s talk about security… @xeraa

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A1:2017-Injection https://www.owasp.org/index.php/ Top_10-2017_Top_10 @xeraa

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Hello World of SQL Injection $sql = “SELECT * FROM employees WHERE id = ” . trim($_GET[“id”]); error_log(“SQL query [read.php]: ” . $sql . “\n”, 3, “/var/log/app.log”); mysqli_multi_query($link, $sql); if($result = mysqli_use_result($link)){ $row = mysqli_fetch_array($result, MYSQLI_ASSOC); @xeraa

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sqlmap —url “https://test.com/bad.php?id=1” @xeraa

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Open source Cross-platform web application firewall (WAF) Visibility into HTTP(S) traffic Rules to implement protections @xeraa

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Custom Rule SecRule REQUEST_FILENAME “form.php” “id:’400001’,chain,deny,log,msg:’Spam detected’” SecRule REQUEST_METHOD “POST” chain SecRule REQUEST_BODY “@rx (?i:(pills|insurance|rolex))” @xeraa