From d3a43a37eefbcdfb9ef6c7e9e1fe70b4287662e7 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Tue, 2 Feb 2021 15:50:14 +0100
Subject: [PATCH] Throw Exception when packed bits compressed data is not
 enough

---
 .../Compression/Decompressors/PackBitsTiffCompression.cs     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ImageSharp/Formats/Tiff/Compression/Decompressors/PackBitsTiffCompression.cs b/src/ImageSharp/Formats/Tiff/Compression/Decompressors/PackBitsTiffCompression.cs
index 6fd939e61..9786ef5ff 100644
--- a/src/ImageSharp/Formats/Tiff/Compression/Decompressors/PackBitsTiffCompression.cs
+++ b/src/ImageSharp/Formats/Tiff/Compression/Decompressors/PackBitsTiffCompression.cs
@@ -43,6 +43,11 @@ namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Compression.Decompresso
                     int literalOffset = compressedOffset + 1;
                     int literalLength = compressedData[compressedOffset] + 1;
 
+                    if ((literalOffset + literalLength) > compressedData.Length)
+                    {
+                        TiffThrowHelper.ThrowImageFormatException("Tiff packbits compression error: not enough data.");
+                    }
+
                     compressedData.Slice(literalOffset, literalLength).CopyTo(buffer.Slice(decompressedOffset));
 
                     compressedOffset += literalLength + 1;