Depending on the ISerializer set in the Wicket application, it's possible that a Wicket's object deserialized from an untrusted source and utilized by the application to causes the code to enter in an infinite loop. Specifically, Wicket's DiskFileItem class, serialized by Kryo, allows an attacker to hack its serialized form to put a client on an infinite loop if the client attempts to write on the DeferredFileOutputStream attribute. Versions 6.x prior to 6.25.0 and 1.5.x prior to 1.5.17 are affected.
eaa2e71f2907fbd43ee0128d07f137d756dd3e8c6e960de22f4853b9d6e6ff89CVE-2016-6793: Apache Wicket deserialization vulnerability
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected: Apache Wicket 6.x and 1.5.x
Description: Depending on the ISerializer set in the Wicket
application, it's possible that a Wicket's object deserialized from an
untrusted source and utilized by the application to causes the code to
enter in an infinite loop. Specifically, Wicket's DiskFileItem class,
serialized by Kryo, allows an attacker to hack its serialized form to
put a client on an infinite loop if the client attempts to write on
the DeferredFileOutputStream attribute.
Mitigation: Upgrade to Apache Wicket 6.25.0 or 1.5.17
Credit: This issue was discovered by Jacob Baines, Tenable Network
Security and Pedro Santos
References: https://wicket.apache.org/news
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