The Oracle Critical Patch Update for April 2015 includes updates for several Oracle products including Solaris and Java.
Airlock WAF is not affected.
Most of the Java vulnerabilities affect client deployments only. The remaining vulnerabilities are not relevant for Airlock WAF because the affected components are not used (JSSE: CVE-2015-0488, CVE-2015-0204, JCE: CVE-2015-0478).
Most of the Sun Systems/Solaris vulnerabilities can only be exploited locally, which is not an issue for Airlock WAF because all local users are trusted. The remaining vulnerabilities affect a Solaris version or component not used by Airlock WAF (Kernel IDMap in Solaris 11: CVE-2015-2578, MGMT XML interface: CVE-2014-3566, Ldom Manager: CVE-2015-0452).
It is strongly recommended to apply the Critical Patch Update for Java to all Java client installations or to disable or even un-install Java from clients