cve/2017/CVE-2017-3203.md

CVE-2017-3203

Description

The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.

POC

Reference

• http://www.securityweek.com/flaws-java-amf-libraries-allow-remote-code-execution
• https://codewhitesec.blogspot.com/2017/04/amf.html
• https://www.kb.cert.org/vuls/id/307983

Github

• https://github.com/PalindromeLabs/Java-Deserialization-CVEs