It was found that the AJP connector in undertow does not use the ALLOW_ENCODED_SLASH option and thus allow the the slash / anti-slash characters encoded in the url which may lead to path traversal and result in the information disclosure of arbitrary local files.
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform Via RHSA-2018:0478 https://access.redhat.com/errata/RHSA-2018:0478
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 Via RHSA-2018:0480 https://access.redhat.com/errata/RHSA-2018:0480
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 Via RHSA-2018:0479 https://access.redhat.com/errata/RHSA-2018:0479
This issue has been addressed in the following products: Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 7 Red Hat JBoss Enterprise Application Platform 7.1 for RHEL 6 Via RHSA-2018:0481 https://access.redhat.com/errata/RHSA-2018:0481