The Oracle Critical Patch Update for April 2013 includes updates for several Oracle products, including Java and Solaris.
Java Vulnerabilities
Most of the vulnerabilities affect only client-side installations of Java, e.g. Java in web browsers. The following two vulnerabilities affect server-side installations:
Solaris Vulnerabilities
Most of the vulnerabilities can only be exploited by having local access (Shell) on Airlock. Airlock is not affected by these vulnerabilities because there are no interactive local users other than root on the system. The following two vulnerabilities are potentially remotely exploitable but do also not affect Airlock because the affected service is not used on Airlock:
No action required for Airlock.
It is strongly recommended to apply the Java update to all client installations, or better to disable or even un-install Java from clients.