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Vulnerability of OpenSAML Java: invalid trust by MetadataPKIX

Synthesis of the vulnerability 

An attacker with a certificate provided by one of the Trust Anchors indicated in shibmd:KeyAuthority can impersonate the identity of an entity, in order to escalate his privileges on an application using OpenSAML Java.
Impacted software: Mule ESB, OpenSAML-J.
Severity of this computer vulnerability: 3/4.
Creation date: 26/02/2015.
Références of this announce: VIGILANCE-VUL-16270.

Description of the vulnerability 

The OpenSAML Java product uses the MetadataPKIX trust engine.

However, MetadataPKIX accepts an X.509 credential when there is no Trusted Name available for an entityID. This case occurs when an entity has a RoleDescriptor KeyDescriptor containing no KeyName element. Editor's announce indicates the list of vulnerable configurations.

An attacker with a certificate provided by one of the Trust Anchors indicated in shibmd:KeyAuthority can therefore impersonate the identity of an entity, in order to escalate his privileges on an application using OpenSAML Java.
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This computer vulnerability announce impacts software or systems such as Mule ESB, OpenSAML-J.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin is important.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this threat alert.

Solutions for this threat 

OpenSAML Java: version 2.6.5.
The version 2.6.5 is fixed:
  http://shibboleth.net/downloads/java-opensaml/2.6.5/

OpenSAML Java: workaround for MetadataPKIX.
A workaround is indicated in the information source.

Mule ESB: version 3.5.4.
The version 3.5.4 is fixed:
  https://www.mulesoft.com/

Mule ESB: version 3.7.3.
The version 3.7.3 is fixed:
  https://www.mulesoft.com/
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