Java.AMF3.Externalizable.readExternal.Code.Execution

Description

This indicates an attack attempt to exploit a remote Code Execution vulnerability in Action Message Format (AMF3) Java implementations.
The vulnerability is due to an error in java.io.Externalizable when deserializing AMF3 message. A remote attacker could exploit this to execute arbitrary code within the context of the application, via a crafted request.

Affected Products

Exadel Flamingo amf-serializer , version 2.2.0
Flex BlazeDS , versions 4.6.0.23207
Flex BlazeDS , versions 4.7.2
GraniteDS, version 3.1.1.GA

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
https://issues.apache.org/jira/browse/FLEX-35290

References