Changes in TIFF v4.0.7¶
v4.0.7 (tag Release-v4-0-7)
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This document describes the changes made to the software between the previous and current versions (see above). If you don't find something listed here, then it was not done in this timeframe, or it was not considered important enough to be mentioned. The following information is located here:
The libtiff tools bmp2tiff, gif2tiff, ras2tiff, sgi2tiff, sgisv, and ycbcr are completely removed from the distribution. these tools were written in the late 1980s and early 1990s for test and demonstration purposes. In some cases the tools were never updated to support updates to the file format, or the file formats are now rarely used. In all cases these tools increased the libtiff security and maintenance exposure beyond the value offered by the tool.
Software configuration changes¶
TIFFFetchNormalTag(), do not dereference
NULLpointer when values of tags with
TIFF_SETGET_C32_ASCIIaccess are 0-byte arrays. Fixes MapTools bugzilla #2593 (regression introduced by previous fix done on 2016-11-11 for CVE-2016-9297). Reported by Henri Salo. Assigned as CVE-2016-9448
TIFFFetchNormalTag(), make sure that values of tags with
NULLterminated, to avoid potential read outside buffer in
_TIFFPrintField(). Fixes MapTools bugzilla #2590
libtiff/tif_dirread.c: reject images with OJPEG compression that have no
StripOffsetstag, when OJPEG compression is disabled. Prevent
NULLpointer dereference in
TIFFReadRawStrip1()and other functions that expect
td_stripbytecountto be non
NULL. Fixes MapTools bugzilla #2585
td->td_nstripsvalue when it is non-zero, instead of recomputing it. This is needed in
td_nstripsis modified. Fixes a read outsize of array in tiffsplit (or other utilities using
TIFFNumberOfStrips()). Fixes MapTools bugzilla #2587 (CVE-2016-9273)
libtiff/tif_predict.c: Replace assertions by runtime checks to avoid assertions in debug mode, or buffer overflows in release mode. Can happen when dealing with unusual tile size like YCbCr with subsampling. Reported as MSVR 35105 by Axel Souchet & Vishal Chauhan from the MSRC Vulnerabilities & Mitigations
libtiff/tif_dir.c: discard values of
SMaxSampleValuewhen they have been read and the value of
SamplesPerPixelis changed afterwards (like when reading a OJPEG compressed image with a missing
SamplesPerPixeltag, and whose photometric is
SamplesPerPixelbeing 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 MapTools bugzilla #2500 (CVE-2014-8127, duplicate: CVE-2016-3658)
NULLpointer dereference on
td_stripoffsetwhen writing directory, if
FIELD_STRIPOFFSETSwas artificially set for a hack case in OJPEG case. Fixes MapTools bugzilla #2500 (CVE-2014-8127, duplicate: CVE-2016-3658)
TIFFRGBAImageOK()): Reject attempts to read floating point images.
PredictorSetup()): Enforce bits-per-sample requirements of floating point predictor (3). Fixes CVE-2016-3622 "Divide By Zero in the tiff2rgba tool."
libtiff/tif_pixarlog.c: fix out-of-bounds write vulnerabilities in heap allocated buffers. Reported as MSVR 35094. Discovered by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
libtiff/tif_write.c: fix issue in error code path of
TIFFFlushData1()that didn't reset the
tif_rawcpmembers. I'm not completely sure if that could happen in practice outside of the odd behaviour of
t2p_seekproc()of tiff2pdf). The report points that a better fix could be to check the return value of
TIFFFlushData1()in places where it isn't done currently, but it seems this patch is enough. Reported as MSVR 35095. Discovered by Axel Souchet & Vishal Chauhan & Suha Can from the MSRC Vulnerabilities & Mitigations team.
libtiff/tif_pixarlog.c: Fix write buffer overflow in
PixarLogEncode()if more input samples are provided than expected by
PixarLogSetupEncode(). Idea based on
libtiff-4.0.3-25.el7_2.src.rpmby Nikola Forro, but with different and simpler check. (MapTools bugzilla #2544)
libtiff/tif_read.c: Fix out-of-bounds read on memory-mapped files in
tmsize_tmax value (reported by Mathias Svensson)
libtiff/tif_luv.c: validate that for
PHOTOMETRIC_LOGL, there is only one sample per pixel. Avoid potential invalid memory write on corrupted/unexpected images when using the
TIFFRGBAImageBegin()interface (reported by Clay Wood)
libtiff/tif_pixarlog.c: fix potential buffer write overrun in
PixarLogDecode()on corrupted/unexpected images (reported by Mathias Svensson) (CVE-2016-5875)
HAVE_SNPRINTF): Add a '1' to the
HAVE_SNPRINTF): Applied patch by Edward Lam to define
HAVE_SNPRINTFfor Visual Studio 2015.
libtiff/tif_dirread.c: when compiled with
DEFER_STRILE_LOAD, fix regression, introduced on 2014-12-23, when reading a one-strip file without a
StripByteCountstag. GDAL #6490
libtiff/*: upstream typo fixes (mostly contributed by Kurt Schwehr) coming from GDAL internal libtiff
uint16to reduce size of the binary.
tif_dirread.c: fix indentation issues raised by GCC 6
libtiff/tif_pixarlog.c: avoid zlib error messages to pass a
%sformatter, which is undefined behaviour in
libtiff/tif_luv.c: fix potential out-of-bound writes in decode functions in non debug builds by replacing
ifchecks (MapTools bugzilla #2522). Fix potential out-of-bound reads in case of short input data.
libtiff/tif_getimage.c: fix out-of-bound reads in
TIFFRGBAImageinterface in case of unsupported values of
ExtraSamplesfor LogLUV / CIELab. Add explicit call to
TIFFRGBAImageBegin(). Fix CVE-2015-8665 reported by limingxing and CVE-2015-8683 reported by zzf of Alibaba.
libtiff/tif_dirread.c: workaround false positive warning of Clang Static Analyzer about
NULLpointer dereference in
libtiff/tif_fax3.c: remove dead assignment in
Fax3PutEOLgdal(). Found by Clang Static Analyzer
libtiff/tif_dirwrite.c: fix truncation to 32 bit of file offsets in
TIFFWriteDirectorySec()when aligning directory offsets on a even offset (affects BigTIFF). This was a regression of the changeset of 2015-10-19.
DumpModeEncode()should return 0 in case of failure so that the above mentioned functions detect the error.
libtiff/*.c: fix MSVC warnings related to cast shortening and assignment within conditional expression
libtiff/*.c: fix clang -Wshorten-64-to-32 warnings
libtiff/tif_dirread.c: prevent reading ColorMap or TransferFunction if
BitsPerPixel> 24, so as to avoid huge memory allocation and file read attempts
libtiff/tif_dirread.c: remove duplicated assignment (reported by Clang static analyzer)
libtiff/tif_jpeg_12.c: suppress warnings about 'no previous declaration/prototype'
libtiff/tif_dirwrite.c: suffix constants by U to fix 'warning: negative integer implicitly converted to unsigned type' warning (part of
-Wshadowwarnings (only in
tools/Makefile.am: The libtiff tools bmp2tiff, gif2tiff, ras2tiff, sgi2tiff, sgisv, and ycbcr are completely removed from the distribution. The libtiff tools rgb2ycbcr and thumbnail are only built in the build tree for testing. Old files are put in new
archivesubdirectory of the source repository, but not in distribution archives. These changes are made in order to lessen the maintenance burden.
tools/tiff2pdf.c: avoid undefined behaviour related to overlapping of source and destination buffer in
t2p_sample_rgbaa_to_rgb()Fixes MapTools bugzilla #2577
tools/tiff2pdf.c: fix potential integer overflows on 32 bit builds in
t2p_read_tiff_size()Fixes MapTools bugzilla #2576
tools/fax2tiff.c: fix segfault when specifying
-rwithout argument. Patch by Yuriy M. Kaminskiy. Fixes MapTools bugzilla #2572
tools/tiffinfo.c: fix out-of-bound read on some tiled images. (MapTools bugzilla #2517)
tools/tiffcrop.c: fix multiple uint32 overflows in
writeBufferToSeparateTiles()that could cause heap buffer overflows. Reported by Henri Salo from Nixu Corporation. Fixes MapTools bugzilla #2592
tools/tiffcrop.c: fix out-of-bound read of up to 3 bytes in
readContigTilesIntoBuffer(). Reported as MSVR 35092 by Axel Souchet & Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
tools/tiff2pdf.c: fix write buffer overflow of 2 bytes on JPEG compressed images. Reported by Tyler Bohan of Cisco Talos as TALOS-CAN-0187 / CVE-2016-5652. Also prevents writing 2 extra uninitialized bytes to the file stream.
tools/tiffcp.c: fix out-of-bounds write on tiled images with odd tile width vs image width. Reported as MSVR 35103 by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
tools/tiff2pdf.c: fix read -largely- outsize of buffer in
t2p_readwrite_pdf_image_tile(), causing crash, when reading a JPEG compressed image with
TIFFTAG_JPEGTABLESlength being one. Reported as MSVR 35101 by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
tools/tiffcp.c: fix read of undefined variable in case of missing required tags. Found on test case of MSVR 35100.
tools/tiffcrop.c: fix read of undefined buffer in
readContigStripsIntoBuffer()due to uint16 overflow. Probably not a security issue but I can be wrong. Reported as MSVR 35100 by Axel Souchet from the MSRC Vulnerabilities & Mitigations team.
tools/tiffcrop.c: fix various out-of-bounds write vulnerabilities in heap or stack allocated buffers. Reported as MSVR 35093, MSVR 35096 and MSVR 35097. Discovered by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
tools/tiff2pdf.c: fix out-of-bounds write vulnerabilities in heap allocate buffer in
t2p_process_jpeg_strip(). Reported as MSVR 35098. Discovered by Axel Souchet and Vishal Chauhan from the MSRC Vulnerabilities & Mitigations team.
tools/tiff2bw.c: fix weight computation that could result of color value overflow (no security implication). Fix MapTools bugzilla #2550. Patch by Frank Freudenberg.
tools/tiffcrop.c: Fix out-of-bounds write in
loadImage(). From patch
libtiff-4.0.3-25.el7_2.src.rpmby Nikola Forro (MapTools bugzilla #2543)
tools/tiff2rgba.c: Fix integer overflow in size of allocated buffer, when
-bmode is enabled, that could result in out-of-bounds write. Based initially on patch
libtiff-4.0.3-25.el7_2.src.rpmby Nikola Forro, with correction for invalid tests that rejected valid files. (MapTools bugzilla #2545)
tools/tiffcrop.c: Avoid access outside of stack allocated array on a tiled separate TIFF with more than 8 samples per pixel. Reported by Kaixiang Zhang of the Cloud Security Team, Qihoo 360 (CVE-2016-5321 / CVE-2016-5323 , MapTools bugzilla #2558 / MapTools bugzilla #2559)
tools/tiffdump.c: fix a few misaligned 64-bit reads warned by
_TIFFmalloc()argument which resulted in Coverity report. Added more mutiplication overflow checks.
Contributed software changes¶