Collected research

PHPIDS unserialize() Vulnerability: Reusing Framework Object Chains

Advisory 02/2009: PHPIDS unserialize() Vulnerability

Stefan Esser · SektionEins · 8 December 2009

Explains how PHPIDS turns inspection of attacker input into unsafe PHP object deserialization. In Zend Framework applications, a crafted object graph can chain a logging destructor through mail shutdown and layout rendering to a preg_replace filter, enabling PHP code execution. The advisory traces the existing classes used by the chain and identifies PHPIDS 0.6.3.1 as the fix.

Record

Document

Advisory 02/2009: PHPIDS unserialize() Vulnerability

Researcher

Stefan Esser

Published by

SektionEins

Date

8 December 2009

Format

Advisory

Topic

Server

In the archive

• Collected in the 2009 research round

Tags

• php
• deserialization
• gadget-chain
• rce
• vendor-advisory
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Stefan Esser, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 10 September 2026.