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CVE-2016-6793

Status Candidate

Overview

The DiskFileItem class in Apache Wicket 6.x before 6.25.0 and 1.5.x before 1.5.17 allows remote attackers to cause a denial of service (infinite loop) and write to, move, and delete files with the permissions of DiskFileItem, and if running on a Java VM before 1.3.1, execute arbitrary code via a crafted serialized Java object.

Related Files

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
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