CVE-2018-5360 (published 2018-01-14T02:29Z)

LibTIFF before 4.0.6 mishandles the reading of TIFF files, as demonstrated by a heap-based buffer over-read in the ReadTIFFImage function in coders/tiff.c in GraphicsMagick 1.3.27.

Severity: MEDIUM
CVSS v2 base score: 6.8 (AV:N/AC:M/Au:N/C:P/I:P/A:P)
CVSS v3 base score: 8.8, HIGH (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

Weakness information:
cwe_id: CWE-125
cwe_name: Out-of-bounds Read
description: The product reads data past the end, or before the beginning, of the intended buffer.
extended_description: 
            
            
             
			 
         
         

Fix information:
repo_url: https://gitlab.com/libtiff/libtiff
commit_details: repo_url: https://gitlab.com/libtiff/libtiff
author: Even Rouault
author_date: 2016-10-25 21:35:15+00:00
msg: * libtiff/tif_dir.c: discard values of SMinSampleValue and
SMaxSampleValue when they have been read and the value of
SamplesPerPixel is changed afterwards (like when reading a
OJPEG compressed image with a missing SamplesPerPixel tag,
and whose photometric is RGB or YCbCr, forcing SamplesPerPixel
being 3). Otherwise when rewriting the directory (for example
with tiffset, we will expect 3 values whereas the array had been
allocated with just one), thus causing a out of bound read access.
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2500
(CVE-2014-8127, duplicate: CVE-2016-3658)

* libtiff/tif_write.c: avoid null pointer dereference on td_stripoffset
when writing directory, if FIELD_STRIPOFFSETS was artificially set
for a hack case	in OJPEG case.
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2500
(CVE-2014-8127, duplicate: CVE-2016-3658)
repository: repo_url: https://gitlab.com/libtiff/libtiff
repo_name: visit repo url
description: visit repo url
repo_language: visit repo url
owner: libtiff
file_changes: filename: ChangeLog
change_type: ModificationType.MODIFY
diff: @@ -1,3 +1,22 @@
+2016-10-25 Even Rouault <even.rouault at spatialys.com>
+
+	* libtiff/tif_dir.c: discard values of SMinSampleValue and
+	SMaxSampleValue when they have been read and the value of
+	SamplesPerPixel is changed afterwards (like when reading a
+	OJPEG compressed image with a missing SamplesPerPixel tag,
+	and whose photometric is RGB or YCbCr, forcing SamplesPerPixel
+	being 3). Otherwise when rewriting the directory (for example
+	with tiffset, we will expect 3 values whereas the array had been
+	allocated with just one), thus causing a out of bound read access.
+	Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2500
+	(CVE-2014-8127, duplicate: CVE-2016-3658)
+	
+	* libtiff/tif_write.c: avoid null pointer dereference on td_stripoffset
+	when writing directory, if FIELD_STRIPOFFSETS was artificially set
+	for a hack case	in OJPEG case.
+	Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2500
+	(CVE-2014-8127, duplicate: CVE-2016-3658)
+
 2016-10-25 Even Rouault <even.rouault at spatialys.com>
 
 	* tools/tiffinfo.c: fix out-of-bound read on some tiled images.

programming_language: Markdown
filename: tif_dir.c
change_type: ModificationType.MODIFY
diff: @@ -1,4 +1,4 @@
-/* $Id: tif_dir.c,v 1.126 2016-09-04 21:32:56 erouault Exp $ */
+/* $Id: tif_dir.c,v 1.127 2016-10-25 21:35:15 erouault Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -256,6 +256,28 @@ _TIFFVSetField(TIFF* tif, uint32 tag, va_list ap)
 		v = (uint16) va_arg(ap, uint16_vap);
 		if (v == 0)
 			goto badvalue;
+        if( v != td->td_samplesperpixel )
+        {
+            /* See http://bugzilla.maptools.org/show_bug.cgi?id=2500 */
+            if( td->td_sminsamplevalue != NULL )
+            {
+                TIFFWarningExt(tif->tif_clientdata,module,
+                    "SamplesPerPixel tag value is changing, "
+                    "but SMinSampleValue tag was read with a different value. Cancelling it");
+                TIFFClrFieldBit(tif,FIELD_SMINSAMPLEVALUE);
+                _TIFFfree(td->td_sminsamplevalue);
+                td->td_sminsamplevalue = NULL;
+            }
+            if( td->td_smaxsamplevalue != NULL )
+            {
+                TIFFWarningExt(tif->tif_clientdata,module,
+                    "SamplesPerPixel tag value is changing, "
+                    "but SMaxSampleValue tag was read with a different value. Cancelling it");
+                TIFFClrFieldBit(tif,FIELD_SMAXSAMPLEVALUE);
+                _TIFFfree(td->td_smaxsamplevalue);
+                td->td_smaxsamplevalue = NULL;
+            }
+        }
 		td->td_samplesperpixel = (uint16) v;
 		break;
 	case TIFFTAG_ROWSPERSTRIP:

programming_language: C
filename: tif_dirwrite.c
change_type: ModificationType.MODIFY
diff: @@ -1,4 +1,4 @@
-/* $Id: tif_dirwrite.c,v 1.82 2016-09-02 22:42:00 erouault Exp $ */
+/* $Id: tif_dirwrite.c,v 1.83 2016-10-25 21:35:15 erouault Exp $ */
 
 /*
  * Copyright (c) 1988-1997 Sam Leffler
@@ -542,8 +542,20 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64* pdiroff)
 			{
 				if (!isTiled(tif))
 				{
-					if (!TIFFWriteDirectoryTagLongLong8Array(tif,&ndir,dir,TIFFTAG_STRIPOFFSETS,tif->tif_dir.td_nstrips,tif->tif_dir.td_stripoffset))
-						goto bad;
+                    /* td_stripoffset might be NULL in an odd OJPEG case. See
+                     *  tif_dirread.c around line 3634.
+                     * XXX: OJPEG hack.
+                     * If a) compression is OJPEG, b) it's not a tiled TIFF,
+                     * and c) the number of strips is 1,
+                     * then we tolerate the absence of stripoffsets tag,
+                     * because, presumably, all required data is in the
+                     * JpegInterchangeFormat stream.
+                     * We can get here when using tiffset on such a file.
+                     * See http://bugzilla.maptools.org/show_bug.cgi?id=2500
+                    */
+                    if (tif->tif_dir.td_stripoffset != NULL &&
+                        !TIFFWriteDirectoryTagLongLong8Array(tif,&ndir,dir,TIFFTAG_STRIPOFFSETS,tif->tif_dir.td_nstrips,tif->tif_dir.td_stripoffset))
+                        goto bad;
 				}
 				else
 				{

programming_language: C++