Oracle published a list of recently fixed vulnerabilities in the Solaris OS ("Critical Patch Update January 2011 Patch Availability Document for Oracle Sun Products "). Some of them affect Airlock. All vulnerabilities marked as "HIGH" affect subsystems that are not installed on Airlock (ftp, calendar, smb). The patches that apply to Airlock are rated MEDIUM or LOW.
In order to protect your Airlock system against the vulnerabilities listed by Oracle, install Airlock Security Patch ST4205.