[jira] [Created] (IMAGING-277) ArrayIndexOutOfBoundsException in MyLzwDecompressor

["Fabian Meumertzheim (Jira)" <ji...@apache.org>]

Fabian Meumertzheim created IMAGING-277:
-------------------------------------------

             Summary: ArrayIndexOutOfBoundsException in MyLzwDecompressor
                 Key: IMAGING-277
                 URL: https://issues.apache.org/jira/browse/IMAGING-277
             Project: Commons Imaging
          Issue Type: Bug
          Components: Format: GIF
    Affects Versions: 1.0-alpha2
            Reporter: Fabian Meumertzheim


The following Java snippet crashes with an ArrayIndexOutOfBoundsException:
{code:java}
import java.io.IOException;
import java.util.Base64;
import java.util.HashMap;

import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.common.bytesource.ByteSourceArray;
import org.apache.commons.imaging.formats.gif.GifImageParser;

public class GifImageParserCrash1 {
    public static byte[] btoa(String base64) {
        return Base64.getDecoder().decode(base64);
    }

    public static void main(String[] args) {
        byte[] input = btoa("SQAACklJAPVPAAIKACy3LAACAP8JAAD4AA==");
        try {
            new GifImageParser().getBufferedImage(new ByteSourceArray(input), new HashMap<>());
        } catch (IOException | ImageReadException e) {}
    }
}
{code}

The stack trace is:
{noformat}
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 4096 out of bounds for length 4096
        at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.initializeTable(MyLzwDecompressor.java:72)
        at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.<init>(MyLzwDecompressor.java:63)
        at org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.<init>(MyLzwDecompressor.java:45)
        at org.apache.commons.imaging.formats.gif.GifImageParser.readImageDescriptor(GifImageParser.java:395)
        at org.apache.commons.imaging.formats.gif.GifImageParser.readBlocks(GifImageParser.java:261)
        at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:475)
        at org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:459)
        at org.apache.commons.imaging.formats.gif.GifImageParser.getBufferedImage(GifImageParser.java:840)
        at GifImageParserCrash1.main(GifImageParserCrash1.java:17)
{noformat}



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