Description
It was found that the Apache commons-collections library permitted code
execution when deserializing objects involving a specially constructed
chain of classes. A remote attacker could use this flaw to execute
arbitrary code with the permissions of the application using the
commons-collections library. (CVE-2015-7501)
With this update, deserialization of certain classes in the
commons-collections library is no longer allowed. Applications that require
those classes to be deserialized can use the system property
'org.apache.commons.collections.enableUnsafeSerialization' to re-enable
their deserialization.