Struts2 before 2.5.14.1 is affected by the vulnerabilities S2-054 (CVE-2017-15707) [1]. A DoS attack using a malicious request with specially crafted JSON payload is possible when using the outdated json-lib with the Struts REST plugin.
Airlock Suite software is not affected because Apache Struts2 is not used.
Airlock WAF protects vulnerable back-ends if the Airlock WAF JSON parser (<Mapping> - "Advanced" - "Content Parsing" - "Parse JSON objects") is activated for the mapping connected to the vulnerable Struts2 back-end.