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Caleb Fenton

Posts by Caleb Fenton
  • Commons Collections Deserialization Vulnerability Research Findings

    A few weeks ago, I wrote about the recent Apache Commons Collections deserialization vulnerability in Let’s Calm Down About Apache Commons Collections. I said we were going to look into finding other libraries that were also vulnerable. In this post, I publish the findings and conclusions. Then I geek-out by excitedly describing plans and ideas for future research. Research Method The original… READ MORE

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  • Let’s Calm Down About Apache Commons Collections

    On November 6th, 2015, a blog post was published with the title "What Do WebLogic, WebSphere, JBoss, Jenkins, OpenNMS, and Your Application Have in Common? This Vulnerability". The post describes how several popular applications are exploitable via a Java deserialization vulnerability discovered by two security researchers, Gabriel Lawrence and Chris Frohoff. The vulnerability involves combining… READ MORE

  • HTTP Security Headers in Plain English

    Understanding and configuring HTTP security settings can be confusing. There are lots of guides that serve as great technical references for all the different settings, but the purpose of this post is to explain what we have learned implementing a security policy by explaining the various security settings in a simple way. This will also be the first post discussing our Security Headers and CSP… READ MORE

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