From 1c7d6584a7811b7785ae5c1e378f14b5ba0971cf Mon Sep 17 00:00:00 2001 From: takeshi_hoshina Date: Mon, 2 Nov 2020 11:07:33 +0900 Subject: basesystem-jj recipes --- .../libtiff/files/CVE-2018-7456.patch | 178 --------------------- 1 file changed, 178 deletions(-) delete mode 100644 external/poky/meta/recipes-multimedia/libtiff/files/CVE-2018-7456.patch (limited to 'external/poky/meta/recipes-multimedia/libtiff/files/CVE-2018-7456.patch') diff --git a/external/poky/meta/recipes-multimedia/libtiff/files/CVE-2018-7456.patch b/external/poky/meta/recipes-multimedia/libtiff/files/CVE-2018-7456.patch deleted file mode 100644 index 2c11f93d..00000000 --- a/external/poky/meta/recipes-multimedia/libtiff/files/CVE-2018-7456.patch +++ /dev/null @@ -1,178 +0,0 @@ -From be4c85b16e8801a16eec25e80eb9f3dd6a96731b Mon Sep 17 00:00:00 2001 -From: Hugo Lefeuvre -Date: Sun, 8 Apr 2018 14:07:08 -0400 -Subject: [PATCH] Fix NULL pointer dereference in TIFFPrintDirectory - -The TIFFPrintDirectory function relies on the following assumptions, -supposed to be guaranteed by the specification: - -(a) A Transfer Function field is only present if the TIFF file has - photometric type < 3. - -(b) If SamplesPerPixel > Color Channels, then the ExtraSamples field - has count SamplesPerPixel - (Color Channels) and contains - information about supplementary channels. - -While respect of (a) and (b) are essential for the well functioning of -TIFFPrintDirectory, no checks are realized neither by the callee nor -by TIFFPrintDirectory itself. Hence, following scenarios might happen -and trigger the NULL pointer dereference: - -(1) TIFF File of photometric type 4 or more has illegal Transfer - Function field. - -(2) TIFF File has photometric type 3 or less and defines a - SamplesPerPixel field such that SamplesPerPixel > Color Channels - without defining all extra samples in the ExtraSamples fields. - -In this patch, we address both issues with respect of the following -principles: - -(A) In the case of (1), the defined transfer table should be printed - safely even if it isn't 'legal'. This allows us to avoid expensive - checks in TIFFPrintDirectory. Also, it is quite possible that - an alternative photometric type would be developed (not part of the - standard) and would allow definition of Transfer Table. We want - libtiff to be able to handle this scenario out of the box. - -(B) In the case of (2), the transfer table should be printed at its - right size, that is if TIFF file has photometric type Palette - then the transfer table should have one row and not three, even - if two extra samples are declared. - -In order to fulfill (A) we simply add a new 'i < 3' end condition to -the broken TIFFPrintDirectory loop. This makes sure that in any case -where (b) would be respected but not (a), everything stays fine. - -(B) is fulfilled by the loop condition -'i < td->td_samplesperpixel - td->td_extrasamples'. This is enough as -long as (b) is respected. - -Naturally, we also make sure (b) is respected. This is done in the -TIFFReadDirectory function by making sure any non-color channel is -counted in ExtraSamples. - -This commit addresses CVE-2018-7456. - ---- -CVE: CVE-2018-7456 - -Upstream-Status: Backport [gitlab.com/libtiff/libtiff/commit/be4c85b...] - -Signed-off-by: Joe Slater - ---- - libtiff/tif_dirread.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++ - libtiff/tif_print.c | 2 +- - 2 files changed, 63 insertions(+), 1 deletion(-) - -diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c -index 6baa7b3..af5b84a 100644 ---- a/libtiff/tif_dirread.c -+++ b/libtiff/tif_dirread.c -@@ -165,6 +165,7 @@ static int TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, uint32 nstrips, uin - static int TIFFFetchSubjectDistance(TIFF*, TIFFDirEntry*); - static void ChopUpSingleUncompressedStrip(TIFF*); - static uint64 TIFFReadUInt64(const uint8 *value); -+static int _TIFFGetMaxColorChannels(uint16 photometric); - - static int _TIFFFillStrilesInternal( TIFF *tif, int loadStripByteCount ); - -@@ -3505,6 +3506,35 @@ static void TIFFReadDirEntryOutputErr(TIFF* tif, enum TIFFReadDirEntryErr err, c - } - - /* -+ * Return the maximum number of color channels specified for a given photometric -+ * type. 0 is returned if photometric type isn't supported or no default value -+ * is defined by the specification. -+ */ -+static int _TIFFGetMaxColorChannels( uint16 photometric ) -+{ -+ switch (photometric) { -+ case PHOTOMETRIC_PALETTE: -+ case PHOTOMETRIC_MINISWHITE: -+ case PHOTOMETRIC_MINISBLACK: -+ return 1; -+ case PHOTOMETRIC_YCBCR: -+ case PHOTOMETRIC_RGB: -+ case PHOTOMETRIC_CIELAB: -+ return 3; -+ case PHOTOMETRIC_SEPARATED: -+ case PHOTOMETRIC_MASK: -+ return 4; -+ case PHOTOMETRIC_LOGL: -+ case PHOTOMETRIC_LOGLUV: -+ case PHOTOMETRIC_CFA: -+ case PHOTOMETRIC_ITULAB: -+ case PHOTOMETRIC_ICCLAB: -+ default: -+ return 0; -+ } -+} -+ -+/* - * Read the next TIFF directory from a file and convert it to the internal - * format. We read directories sequentially. - */ -@@ -3520,6 +3550,7 @@ TIFFReadDirectory(TIFF* tif) - uint32 fii=FAILED_FII; - toff_t nextdiroff; - int bitspersample_read = FALSE; -+ int color_channels; - - tif->tif_diroff=tif->tif_nextdiroff; - if (!TIFFCheckDirOffset(tif,tif->tif_nextdiroff)) -@@ -4024,6 +4055,37 @@ TIFFReadDirectory(TIFF* tif) - } - } - } -+ -+ /* -+ * Make sure all non-color channels are extrasamples. -+ * If it's not the case, define them as such. -+ */ -+ color_channels = _TIFFGetMaxColorChannels(tif->tif_dir.td_photometric); -+ if (color_channels && tif->tif_dir.td_samplesperpixel - tif->tif_dir.td_extrasamples > color_channels) { -+ uint16 old_extrasamples; -+ uint16 *new_sampleinfo; -+ -+ TIFFWarningExt(tif->tif_clientdata,module, "Sum of Photometric type-related " -+ "color channels and ExtraSamples doesn't match SamplesPerPixel. " -+ "Defining non-color channels as ExtraSamples."); -+ -+ old_extrasamples = tif->tif_dir.td_extrasamples; -+ tif->tif_dir.td_extrasamples = (tif->tif_dir.td_samplesperpixel - color_channels); -+ -+ // sampleinfo should contain information relative to these new extra samples -+ new_sampleinfo = (uint16*) _TIFFcalloc(tif->tif_dir.td_extrasamples, sizeof(uint16)); -+ if (!new_sampleinfo) { -+ TIFFErrorExt(tif->tif_clientdata, module, "Failed to allocate memory for " -+ "temporary new sampleinfo array (%d 16 bit elements)", -+ tif->tif_dir.td_extrasamples); -+ goto bad; -+ } -+ -+ memcpy(new_sampleinfo, tif->tif_dir.td_sampleinfo, old_extrasamples * sizeof(uint16)); -+ _TIFFsetShortArray(&tif->tif_dir.td_sampleinfo, new_sampleinfo, tif->tif_dir.td_extrasamples); -+ _TIFFfree(new_sampleinfo); -+ } -+ - /* - * Verify Palette image has a Colormap. - */ -diff --git a/libtiff/tif_print.c b/libtiff/tif_print.c -index 8deceb2..1d86adb 100644 ---- a/libtiff/tif_print.c -+++ b/libtiff/tif_print.c -@@ -544,7 +544,7 @@ TIFFPrintDirectory(TIFF* tif, FILE* fd, long flags) - uint16 i; - fprintf(fd, " %2ld: %5u", - l, td->td_transferfunction[0][l]); -- for (i = 1; i < td->td_samplesperpixel; i++) -+ for (i = 1; i < td->td_samplesperpixel - td->td_extrasamples && i < 3; i++) - fprintf(fd, " %5u", - td->td_transferfunction[i][l]); - fputc('\n', fd); --- -1.7.9.5 - -- cgit 1.2.3-korg