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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/io/Serializable/modifyStaticFields/ModifyStaticFields.java Normal file
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/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4334623
* @summary Verify that serialPersistentFields cannot be used to cause
* deserialization to set the value of a static field.
*/
import java.io.*;
public class ModifyStaticFields implements Serializable {
private static final long serialVersionUID = 1L;
private static final ObjectStreamField[] serialPersistentFields =
new ObjectStreamField[] { new ObjectStreamField("str", String.class) };
static String str = "foo";
public static void main(String[] args) throws Exception {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject(new ModifyStaticFields());
oout.close();
String origStr = str;
ObjectInputStream oin = new ObjectInputStream(
new ByteArrayInputStream(bout.toByteArray()));
oin.readObject();
if (str != origStr) {
throw new Error("deserialization modified static field");
}
}
private void writeObject(ObjectOutputStream out) throws IOException {
ObjectOutputStream.PutField pf = out.putFields();
pf.put("str", "bar");
out.writeFields();
}
}