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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
commit 0a580b313d
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test/jdk/java/io/Serializable/readPastObject/ReadPastObject.java Normal file
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/*
* Copyright (c) 1999, 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 4253271
* @summary Ensure that ObjectInputStream.readObject() is called, it doesn't
* read past the end of the object in the underlying stream.
*/
import java.io.*;
class LimitInputStream extends ByteArrayInputStream {
int limit;
LimitInputStream(byte[] b) {
super(b);
limit = b.length;
}
public int read() {
if (limit < 1)
throw new Error("limit exceeded");
int c = super.read();
if (c != -1)
limit--;
return c;
}
public int read(byte[] b) {
return read(b, 0, b.length);
}
public int read(byte[] b, int off, int len) {
if (limit < len)
throw new Error("limit exceeded");
int n = super.read(b, off, len);
if (n != -1)
limit -= n;
return n;
}
}
public class ReadPastObject {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject("foo");
LimitInputStream lin = new LimitInputStream(bout.toByteArray());
ObjectInputStream oin = new ObjectInputStream(lin);
System.out.println(oin.readObject());
}
}