Sharing knowledge and experiments on cyber security topics.
During a recent engagement, I came accross a Symfony 1 application which contained several deserialization from untrusted user inputs.
However, there was no public gadget chains available for Symfony 1, only for Symfony 2 and onwards. So I decided to look for gadgets for the version of the audited application. I finally expanded the work to all versions of Symfony 1 as a challenge, from 1.0 to 1.5.
Read more →This article provides a detailed walkthrough and tips on how to exploit PHP unserialize vulnerability. It is based on a real world case: Wordpress plugin All in one SEO pack <= 4.1.0.1.
It enables authenticated users with “aioseo_tools_settings” privilege (most of the time admin) to execute arbitrary code on the underlying host. Users can restore plugin’s configuration by uploading a backup .ini file. However, the plugin attempts to unserialize values of the .ini file. Moreover, the plugin embeds Monolog library which can be used to craft a gadget chain and thus trigger system command execution.
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I work as a pentester in a cyber security company. This blog aims at sharing my thoughts and experiments on different topics if it can help otheres: web and internal penetration tests, vulnerability research, write-ups, exploit development, security best practices, tooling, and so on... I previously worked as a senior software developer and switched to this wonderfull land of security :)