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Apache Wicket 6.x / 1.5.x Deserialization

Apache Wicket 6.x / 1.5.x Deserialization
Posted Jan 1, 2016
Authored by Pedro Santos

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.

tags | advisory
advisories | CVE-2016-6793
MD5 | 844d2eec20ec5f9374eaf3cccc5d16de

Apache Wicket 6.x / 1.5.x Deserialization

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CVE-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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