OSGi bundles show version 0.0.0 in AS7

JBoss internal OSGi bundles seem to always report bundle version as 0.0.0. Examples from the admin console:

javax.annotation.api:0.0.0
javax.ejb.api:0.0.0
javax.interceptor.api:0.0.0
javax.jms.api:0.0.0
javax.jws.api:0.0.0
javax.management.j2ee.api:0.0.0
javax.persistence.api:0.0.0
javax.servlet.api:0.0.0
javax.transaction.api:0.0.0
javax.ws.rs.api:0.0.0
javax.xml.bind.api:0.0.0
javax.xml.ws.api:0.0.0
org.jboss.as.osgi.http:0.0.0