400 lines
16 KiB
HTML
400 lines
16 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>
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Changes in TIFF v4.0.7
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</TITLE>
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</HEAD>
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<BODY BGCOLOR=white>
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<FONT FACE="Helvetica, Arial, Sans">
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<BASEFONT SIZE=4>
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<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
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<BASEFONT SIZE=3>
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<UL>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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<B>Current Version</B>: v4.0.7<BR>
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<B>Previous Version</B>: <A HREF=v4.0.6.html>v4.0.6</a><BR>
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<B>Master FTP Site</B>: <A HREF="ftp://download.osgeo.org/libtiff">
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download.osgeo.org</a>, directory pub/libtiff</A><BR>
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<B>Master HTTP Site #1</B>: <A HREF="http://www.simplesystems.org/libtiff/">
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http://www.simplesystems.org/libtiff/</a><BR>
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<B>Master HTTP Site #2</B>: <A HREF="http://libtiff.maptools.org/">
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http://libtiff.maptools.org/</a>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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</UL>
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<P>
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This document describes the changes made to the software between the
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<I>previous</I> and <I>current</I> versions (see above). If you don't
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find something listed here, then it was not done in this timeframe, or
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it was not considered important enough to be mentioned. The following
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information is located here:
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<UL>
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<LI><A HREF="#highlights">Major Changes</A>
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<LI><A HREF="#configure">Changes in the software configuration</A>
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<LI><A HREF="#libtiff">Changes in libtiff</A>
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<LI><A HREF="#tools">Changes in the tools</A>
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<LI><A HREF="#contrib">Changes in the contrib area</A>
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</UL>
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<p>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
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<UL>
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<LI> The libtiff tools bmp2tiff, gif2tiff, ras2tiff, sgi2tiff,
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sgisv, and ycbcr are completely removed from the distribution.
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These tools were written in the late 1980s and early 1990s for
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test and demonstration purposes. In some cases the tools were
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never updated to support updates to the file format, or the
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file formats are now rarely used. In all cases these tools
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increased the libtiff security and maintenance exposure beyond
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the value offered by the tool.
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>
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<UL>
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<LI> None
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
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<UL>
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<LI> libtiff/tif_aux.c: fix crash in TIFFVGetFieldDefaulted() when
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requesting Predictor tag and that the zip/lzw codec is not
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configured. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2591
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<LI> libtiff/tif_dirread.c: in TIFFFetchNormalTag(), make sure
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that values of tags with TIFF_SETGET_C16_ASCII /
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TIFF_SETGET_C32_ASCII access are null terminated, to avoid
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potential read outside buffer in _TIFFPrintField(). Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2590
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<LI> libtiff/tif_dirread.c: reject images with OJPEG compression
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that have no TileOffsets/StripOffsets tag, when OJPEG
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compression is disabled. Prevent null pointer dereference in
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TIFFReadRawStrip1() and other functions that expect
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td_stripbytecount to be non NULL. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2585
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<LI> tools/tiffcrop.c: fix multiple uint32 overflows in
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writeBufferToSeparateStrips(), writeBufferToContigTiles() and
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writeBufferToSeparateTiles() that could cause heap buffer
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overflows. Reported by Henri Salo from Nixu Corporation.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2592
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<LI> libtiff/tif_strip.c: make TIFFNumberOfStrips() return the
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td->td_nstrips value when it is non-zero, instead of
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recomputing it. This is needed in TIFF_STRIPCHOP mode where
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td_nstrips is modified. Fixes a read outsize of array in
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tiffsplit (or other utilities using TIFFNumberOfStrips()).
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2587
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(CVE-2016-9273)
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<LI> libtiff/tif_predict.h, libtiff/tif_predict.c: Replace
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assertions by runtime checks to avoid assertions in debug
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mode, or buffer overflows in release mode. Can happen when
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dealing with unusual tile size like YCbCr with
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subsampling. Reported as MSVR 35105 by Axel Souchet & Vishal
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Chauhan from the MSRC Vulnerabilities & Mitigations
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<LI> libtiff/tif_dir.c: discard values of SMinSampleValue and
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SMaxSampleValue when they have been read and the value of
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SamplesPerPixel is changed afterwards (like when reading a
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OJPEG compressed image with a missing SamplesPerPixel tag, and
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whose photometric is RGB or YCbCr, forcing SamplesPerPixel
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being 3). Otherwise when rewriting the directory (for example
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with tiffset, we will expect 3 values whereas the array had
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been allocated with just one), thus causing a out of bound
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read access. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2500
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(CVE-2014-8127, duplicate: CVE-2016-3658)
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<LI> libtiff/tif_dirwrite.c: avoid null pointer dereference on
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td_stripoffset when writing directory, if FIELD_STRIPOFFSETS
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was artificially set for a hack case in OJPEG case. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2500
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(CVE-2014-8127, duplicate: CVE-2016-3658)
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<LI> libtiff/tif_getimage.c (TIFFRGBAImageOK): Reject attempts to
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read floating point images.
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<LI> libtiff/tif_predict.c (PredictorSetup): Enforce
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bits-per-sample requirements of floating point predictor (3).
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Fixes CVE-2016-3622 "Divide By Zero in the tiff2rgba tool."
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<LI> libtiff/tif_pixarlog.c: fix out-of-bounds write vulnerabilities
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in heap allocated buffers. Reported as MSVR 35094. Discovered by
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Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities &
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Mitigations team.
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<LI> libtiff/tif_write.c: fix issue in error code path of
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TIFFFlushData1() that didn't reset the tif_rawcc and tif_rawcp
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members. I'm not completely sure if that could happen in
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practice outside of the odd behaviour of t2p_seekproc() of
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tiff2pdf). The report points that a better fix could be to
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check the return value of TIFFFlushData1() in places where it
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isn't done currently, but it seems this patch is enough.
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Reported as MSVR 35095. Discovered by Axel Souchet & Vishal
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Chauhan & Suha Can from the MSRC Vulnerabilities & Mitigations
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team.
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<LI> libtiff/tif_pixarlog.c: Fix write buffer overflow in
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PixarLogEncode if more input samples are provided than
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expected by PixarLogSetupEncode. Idea based on
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libtiff-CVE-2016-3990.patch from
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libtiff-4.0.3-25.el7_2.src.rpm by Nikola Forro, but with
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different and simpler check. (bugzilla #2544)
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<LI> libtiff/tif_read.c: Fix out-of-bounds read on memory-mapped
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files in TIFFReadRawStrip1() and TIFFReadRawTile1() when
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stripoffset is beyond tmsize_t max value (reported by Mathias
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Svensson)
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<LI> libtiff/tif_read.c: make TIFFReadEncodedStrip() and
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TIFFReadEncodedTile() directly use user provided buffer when
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no compression (and other conditions) to save a memcpy()
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<LI> libtiff/tif_write.c: make TIFFWriteEncodedStrip() and
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TIFFWriteEncodedTile() directly use user provided buffer when
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no compression to save a memcpy().
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<LI> libtiff/tif_luv.c: validate that for COMPRESSION_SGILOG and
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PHOTOMETRIC_LOGL, there is only one sample per pixel. Avoid
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potential invalid memory write on corrupted/unexpected images
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when using the TIFFRGBAImageBegin() interface (reported by
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Clay Wood)
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<LI> libtiff/tif_pixarlog.c: fix potential buffer write overrun in
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PixarLogDecode() on corrupted/unexpected images (reported by
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Mathias Svensson) (CVE-2016-5875)
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<LI> libtiff/libtiff.def: Added _TIFFMultiply32 and
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_TIFFMultiply64 to libtiff.def
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<LI> libtiff/tif_config.vc.h (HAVE_SNPRINTF): Add a '1' to the
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HAVE_SNPRINTF definition.
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<LI> libtiff/tif_config.vc.h (HAVE_SNPRINTF): Applied patch by
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Edward Lam to define HAVE_SNPRINTF for Visual Studio 2015.
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<LI> libtiff/tif_dirread.c: when compiled with DEFER_STRILE_LOAD,
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fix regression, introduced on 2014-12-23, when reading a
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one-strip file without a StripByteCounts tag. GDAL #6490
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<LI> libtiff/*: upstream typo fixes (mostly contributed by Kurt
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Schwehr) coming from GDAL internal libtiff
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<LI> libtiff/tif_fax3.h: make Param member of TIFFFaxTabEnt
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structure a uint16 to reduce size of the binary.
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<LI> libtiff/tif_read.c, tif_dirread.c: fix indentation issues
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raised by GCC 6 -Wmisleading-indentation
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<LI> libtiff/tif_pixarlog.c: avoid zlib error messages to pass a
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NULL string to %s formatter, which is undefined behaviour in
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sprintf().
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<LI> libtiff/tif_next.c: fix potential out-of-bound write in NeXTDecode()
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triggered by http://lcamtuf.coredump.cx/afl/vulns/libtiff5.tif
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(bugzilla #2508)
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<LI> libtiff/tif_luv.c: fix potential out-of-bound writes in
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decode functions in non debug builds by replacing assert()s by
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regular if checks (bugzilla #2522). Fix potential
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out-of-bound reads in case of short input data.
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<LI> libtiff/tif_getimage.c: fix out-of-bound reads in
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TIFFRGBAImage interface in case of unsupported values of
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SamplesPerPixel/ExtraSamples for LogLUV / CIELab. Add explicit
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call to TIFFRGBAImageOK() in TIFFRGBAImageBegin(). Fix
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CVE-2015-8665 reported by limingxing and CVE-2015-8683
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reported by zzf of Alibaba.
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<LI> libtiff/tif_dirread.c: workaround false positive warning of
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Clang Static Analyzer about null pointer dereference in
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TIFFCheckDirOffset().
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<LI> libtiff/tif_fax3.c: remove dead assignment in
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Fax3PutEOLgdal(). Found by Clang Static Analyzer
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<LI> libtiff/tif_dirwrite.c: fix truncation to 32 bit of file
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offsets in TIFFLinkDirectory() and TIFFWriteDirectorySec()
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when aligning directory offsets on a even offset (affects
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BigTIFF). This was a regression of the changeset of
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2015-10-19.
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<LI> libtiff/tif_write.c: TIFFWriteEncodedStrip() and
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TIFFWriteEncodedTile() should return -1 in case of failure of
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tif_encodestrip() as documented
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<LI> libtiff/tif_dumpmode.c: DumpModeEncode() should return 0 in
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case of failure so that the above mentionned functions detect
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the error.
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<LI> libtiff/*.c: fix MSVC warnings related to cast shortening and
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assignment within conditional expression
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<LI> libtiff/*.c: fix clang -Wshorten-64-to-32 warnings
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<LI> libtiff/tif_dirread.c: prevent reading ColorMap or
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TransferFunction if BitsPerPixel > 24, so as to avoid huge
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memory allocation and file read attempts
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<LI> libtiff/tif_dirread.c: remove duplicated assignment (reported
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by Clang static analyzer)
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<LI> libtiff/tif_dir.c, libtiff/tif_dirinfo.c,
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libtiff/tif_compress.c, libtiff/tif_jpeg_12.c: suppress
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warnings about 'no previous declaration/prototype'
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<LI> libtiff/tiffiop.h, libtiff/tif_dirwrite.c: suffix constants
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by U to fix 'warning: negative integer implicitly converted to
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unsigned type' warning (part of -Wconversion)
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<LI> libtiff/tif_dir.c, libtiff/tif_dirread.c,
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libtiff/tif_getimage.c, libtiff/tif_print.c: fix -Wshadow
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warnings (only in libtiff/)
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!-------------------------------------------------------------------------->
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<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
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<UL>
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<LI> tools/Makefile.am: The libtiff tools bmp2tiff, gif2tiff,
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ras2tiff, sgi2tiff, sgisv, and ycbcr are completely removed
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from the distribution. The libtiff tools rgb2ycbcr and
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thumbnail are only built in the build tree for testing. Old
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files are put in new 'archive' subdirectory of the source
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repository, but not in distribution archives. These changes
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are made in order to lessen the maintenance burden.
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<LI> tools/tiff2pdf.c: avoid undefined behaviour related to
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overlapping of source and destination buffer in memcpy() call
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in t2p_sample_rgbaa_to_rgb() Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2577
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<LI> tools/tiff2pdf.c: fix potential integer overflows on 32 bit
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builds in t2p_read_tiff_size() Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2576
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<LI> tools/fax2tiff.c: fix segfault when specifying -r without
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argument. Patch by Yuriy M. Kaminskiy. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2572
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<LI> tools/tiffinfo.c: fix out-of-bound read on some tiled images.
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(http://bugzilla.maptools.org/show_bug.cgi?id=2517)
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<LI> tools/tiffcrop.c: fix out-of-bound read of up to 3 bytes in
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readContigTilesIntoBuffer(). Reported as MSVR 35092 by Axel
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Souchet & Vishal Chauhan from the MSRC Vulnerabilities &
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Mitigations team.
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<LI> tools/tiff2pdf.c: fix write buffer overflow of 2 bytes on
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JPEG compressed images. Reported by Tyler Bohan of Cisco Talos
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as TALOS-CAN-0187 / CVE-2016-5652. Also prevents writing 2
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extra uninitialized bytes to the file stream.
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<LI> tools/tiffcp.c: fix out-of-bounds write on tiled images with odd
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tile width vs image width. Reported as MSVR 35103
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by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities &
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Mitigations team.
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<LI> tools/tiff2pdf.c: fix read -largely- outsize of buffer in
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t2p_readwrite_pdf_image_tile(), causing crash, when reading a
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JPEG compressed image with TIFFTAG_JPEGTABLES length being
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one. Reported as MSVR 35101 by Axel Souchet and Vishal
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Chauhan from the MSRC Vulnerabilities & Mitigations team.
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<LI> tools/tiffcp.c: fix read of undefined variable in case of
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missing required tags. Found on test case of MSVR 35100.
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<LI> tools/tiffcrop.c: fix read of undefined buffer in
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readContigStripsIntoBuffer() due to uint16 overflow. Probably
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not a security issue but I can be wrong. Reported as MSVR
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35100 by Axel Souchet from the MSRC Vulnerabilities &
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Mitigations team.
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<LI> tools/tiffcrop.c: fix various out-of-bounds write
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vulnerabilities in heap or stack allocated buffers. Reported
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as MSVR 35093, MSVR 35096 and MSVR 35097. Discovered by Axel
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Souchet and Vishal Chauhan from the MSRC Vulnerabilities &
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Mitigations team.
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<LI> tools/tiff2pdf.c: fix out-of-bounds write vulnerabilities in
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heap allocate buffer in t2p_process_jpeg_strip(). Reported as
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MSVR 35098. Discovered by Axel Souchet and Vishal Chauhan from
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the MSRC Vulnerabilities & Mitigations team.
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<LI> tools/tiff2bw.c: fix weight computation that could result of
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color value overflow (no security implication). Fix bugzilla
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#2550. Patch by Frank Freudenberg.
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<LI> tools/rgb2ycbcr.c: validate values of -v and -h parameters to
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avoid potential divide by zero. Fixes CVE-2016-3623 (bugzilla #2569)
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<LI> tools/tiffcrop.c: Fix out-of-bounds write in loadImage().
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From patch libtiff-CVE-2016-3991.patch from
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libtiff-4.0.3-25.el7_2.src.rpm by Nikola Forro (bugzilla
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#2543)
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<LI> tools/tiff2rgba.c: Fix integer overflow in size of allocated
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buffer, when -b mode is enabled, that could result in
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out-of-bounds write. Based initially on patch
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tiff-CVE-2016-3945.patch from libtiff-4.0.3-25.el7_2.src.rpm
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by Nikola Forro, with correction for invalid tests that
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rejected valid files. (bugzilla #2545)
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<LI> tools/tiffcrop.c: Avoid access outside of stack allocated
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array on a tiled separate TIFF with more than 8 samples per
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pixel. Reported by Kaixiang Zhang of the Cloud Security Team,
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Qihoo 360 (CVE-2016-5321 / CVE-2016-5323 , bugzilla #2558 /
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#2559)
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<LI> tools/tiffdump.c: fix a few misaligned 64-bit reads warned by
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-fsanitize
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
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<UL>
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<LI> None
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</UL>
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Last updated $Date: 2016-11-12 18:30:47 $.
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