Apache Struts 2.5.x < 2.5.8 URLValidator Form Field Handling Remote DoS
Medium Nessus Plugin ID 95887
SynopsisThe remote Windows host contains a web application that uses a Java framework that is affected by a denial of service vulnerability.
DescriptionThe version of Apache Struts running on the remote Windows host is 2.5.x prior to 2.5.8. It is, therefore, potentially affected by a denial of service vulnerability in the URLValidator class due to improper handling of user-supplied input to the form field. An unauthenticated, remote attacker can exploit this, via a specially crafted URL, to overload server processes.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
SolutionUpgrade to Apache Struts version 2.5.8 or later. Alternatively, apply the workaround referenced in the vendor advisory.