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tiff: Apply security patches from debian

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Before

$ ./cve-check tiff
using srcpkgs/tiff/cve-check.
CVE: CVE-2017-17095 SEVERITY: 6.8
CVE: CVE-2017-17942 SEVERITY: 6.8
CVE: CVE-2017-18013 SEVERITY: 4.3
CVE: CVE-2018-10126 SEVERITY: 4.3
CVE: CVE-2018-10963 SEVERITY: 4.3
CVE: CVE-2018-12900 SEVERITY: 6.8
CVE: CVE-2018-5784 SEVERITY: 4.3
CVE: CVE-2018-7456 SEVERITY: 4.3
CVE: CVE-2018-8905 SEVERITY: 6.8

After

$ cve-check tiff
using srcpkgs/tiff/cve-check.
CVE: CVE-2017-17942 SEVERITY: 6.8
CVE: CVE-2018-10126 SEVERITY: 4.3
CVE: CVE-2018-12900 SEVERITY: 6.8
This commit is contained in:
maxice8 2018-10-01 22:48:41 -03:00 committed by Enno Boland
parent 19047cf745
commit 9cf12a7d58
10 changed files with 625 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
srcpkgs/tiff/patches/CVE-2017-11613_part1.patch Normal file
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@ -0,0 +1,40 @@
From 3719385a3fac5cfb20b487619a5f08abbf967cf8 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sun, 11 Mar 2018 11:14:01 +0100
Subject: [PATCH] ChopUpSingleUncompressedStrip: avoid memory exhaustion (CVE-2017-11613)
In ChopUpSingleUncompressedStrip(), if the computed number of strips is big
enough and we are in read only mode, validate that the file size is consistent
with that number of strips to avoid useless attempts at allocating a lot of
memory for the td_stripbytecount and td_stripoffset arrays.
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2724
---
libtiff/tif_dirread.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
index 3fc0c8e..1a3259c 100644
--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -5698,6 +5698,17 @@ ChopUpSingleUncompressedStrip(TIFF* tif)
if( nstrips == 0 )
return;
+ /* If we are going to allocate a lot of memory, make sure that the */
+ /* file is as big as needed */
+ if( tif->tif_mode == O_RDONLY &&
+ nstrips > 1000000 &&
+ (tif->tif_dir.td_stripoffset[0] >= TIFFGetFileSize(tif) ||
+ tif->tif_dir.td_stripbytecount[0] >
+ TIFFGetFileSize(tif) - tif->tif_dir.td_stripoffset[0]) )
+ {
+ return;
+ }
+
newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64),
"for chopped \"StripByteCounts\" array");
newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64),
--
libgit2 0.27.0

33
srcpkgs/tiff/patches/CVE-2017-11613_part2.patch Normal file
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@ -0,0 +1,33 @@
From 7a092f8af2568d61993a8cc2e7a35a998d7d37be Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 17 Mar 2018 09:36:29 +0100
Subject: [PATCH] ChopUpSingleUncompressedStrip: avoid memory exhaustion (CVE-2017-11613)
Rework fix done in 3719385a3fac5cfb20b487619a5f08abbf967cf8 to work in more
cases like https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6979.
Credit to OSS Fuzz
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2724
---
libtiff/tif_dirread.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c
index 1a3259c..6baa7b3 100644
--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -5702,9 +5702,8 @@ ChopUpSingleUncompressedStrip(TIFF* tif)
/* file is as big as needed */
if( tif->tif_mode == O_RDONLY &&
nstrips > 1000000 &&
- (tif->tif_dir.td_stripoffset[0] >= TIFFGetFileSize(tif) ||
- tif->tif_dir.td_stripbytecount[0] >
- TIFFGetFileSize(tif) - tif->tif_dir.td_stripoffset[0]) )
+ (offset >= TIFFGetFileSize(tif) ||
+ stripbytes > (TIFFGetFileSize(tif) - offset) / (nstrips - 1)) )
{
return;
}
--
libgit2 0.27.0

40
srcpkgs/tiff/patches/CVE-2017-17095.patch Normal file
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@ -0,0 +1,40 @@
From 9171da596c88e6a2dadcab4a3a89dddd6e1b4655 Mon Sep 17 00:00:00 2001
From: Nathan Baker <elitebadger@gmail.com>
Date: Thu, 25 Jan 2018 21:28:15 +0000
Subject: [PATCH] Add workaround to pal2rgb buffer overflow.
---
tools/pal2rgb.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/tools/pal2rgb.c b/tools/pal2rgb.c
index 0423598..01fcf94 100644
--- a/tools/pal2rgb.c
+++ b/tools/pal2rgb.c
@@ -184,8 +184,21 @@ main(int argc, char* argv[])
{ unsigned char *ibuf, *obuf;
register unsigned char* pp;
register uint32 x;
- ibuf = (unsigned char*)_TIFFmalloc(TIFFScanlineSize(in));
- obuf = (unsigned char*)_TIFFmalloc(TIFFScanlineSize(out));
+ tmsize_t tss_in = TIFFScanlineSize(in);
+ tmsize_t tss_out = TIFFScanlineSize(out);
+ if (tss_out / tss_in < 3) {
+ /*
+ * BUG 2750: The following code does not know about chroma
+ * subsampling of JPEG data. It assumes that the output buffer is 3x
+ * the length of the input buffer due to exploding the palette into
+ * RGB tuples. If this assumption is incorrect, it could lead to a
+ * buffer overflow. Go ahead and fail now to prevent that.
+ */
+ fprintf(stderr, "Could not determine correct image size for output. Exiting.\n");
+ return -1;
+ }
+ ibuf = (unsigned char*)_TIFFmalloc(tss_in);
+ obuf = (unsigned char*)_TIFFmalloc(tss_out);
switch (config) {
case PLANARCONFIG_CONTIG:
for (row = 0; row < imagelength; row++) {
--
libgit2 0.27.0

34
srcpkgs/tiff/patches/CVE-2017-18013.patch Normal file
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@ -0,0 +1,34 @@
From c6f41df7b581402dfba3c19a1e3df4454c551a01 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sun, 31 Dec 2017 15:09:41 +0100
Subject: [PATCH] libtiff/tif_print.c: TIFFPrintDirectory(): fix null pointer dereference on corrupted file. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2770
---
libtiff/tif_print.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libtiff/tif_print.c b/libtiff/tif_print.c
index 9959d35..8deceb2 100644
--- a/libtiff/tif_print.c
+++ b/libtiff/tif_print.c
@@ -667,13 +667,13 @@ TIFFPrintDirectory(TIFF* tif, FILE* fd, long flags)
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
fprintf(fd, " %3lu: [%8I64u, %8I64u]\n",
(unsigned long) s,
- (unsigned __int64) td->td_stripoffset[s],
- (unsigned __int64) td->td_stripbytecount[s]);
+ td->td_stripoffset ? (unsigned __int64) td->td_stripoffset[s] : 0,
+ td->td_stripbytecount ? (unsigned __int64) td->td_stripbytecount[s] : 0);
#else
fprintf(fd, " %3lu: [%8llu, %8llu]\n",
(unsigned long) s,
- (unsigned long long) td->td_stripoffset[s],
- (unsigned long long) td->td_stripbytecount[s]);
+ td->td_stripoffset ? (unsigned long long) td->td_stripoffset[s] : 0,
+ td->td_stripbytecount ? (unsigned long long) td->td_stripbytecount[s] : 0);
#endif
}
}
--
libgit2 0.26.0

117
srcpkgs/tiff/patches/CVE-2017-9935.patch Normal file
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@ -0,0 +1,117 @@
diff --git a/libtiff/tif_dir.c b/libtiff/tif_dir.c
index 2ccaf44..cbf2b69 100644
--- a/libtiff/tif_dir.c
+++ b/libtiff/tif_dir.c
@@ -1067,6 +1067,9 @@ _TIFFVGetField(TIFF* tif, uint32 tag, va_list ap)
if (td->td_samplesperpixel - td->td_extrasamples > 1) {
*va_arg(ap, uint16**) = td->td_transferfunction[1];
*va_arg(ap, uint16**) = td->td_transferfunction[2];
+ } else {
+ *va_arg(ap, uint16**) = NULL;
+ *va_arg(ap, uint16**) = NULL;
}
break;
case TIFFTAG_REFERENCEBLACKWHITE:
diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c
index d1a9b09..484776c 100644
--- a/tools/tiff2pdf.c
+++ b/tools/tiff2pdf.c
@@ -237,7 +237,7 @@ typedef struct {
float tiff_whitechromaticities[2];
float tiff_primarychromaticities[6];
float tiff_referenceblackwhite[2];
- float* tiff_transferfunction[3];
+ uint16* tiff_transferfunction[3];
int pdf_image_interpolate; /* 0 (default) : do not interpolate,
1 : interpolate */
uint16 tiff_transferfunctioncount;
@@ -1047,6 +1047,8 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){
uint16 pagen=0;
uint16 paged=0;
uint16 xuint16=0;
+ uint16 tiff_transferfunctioncount=0;
+ uint16* tiff_transferfunction[3];
directorycount=TIFFNumberOfDirectories(input);
t2p->tiff_pages = (T2P_PAGE*) _TIFFmalloc(TIFFSafeMultiply(tmsize_t,directorycount,sizeof(T2P_PAGE)));
@@ -1147,26 +1149,48 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){
}
#endif
if (TIFFGetField(input, TIFFTAG_TRANSFERFUNCTION,
- &(t2p->tiff_transferfunction[0]),
- &(t2p->tiff_transferfunction[1]),
- &(t2p->tiff_transferfunction[2]))) {
- if((t2p->tiff_transferfunction[1] != (float*) NULL) &&
- (t2p->tiff_transferfunction[2] != (float*) NULL) &&
- (t2p->tiff_transferfunction[1] !=
- t2p->tiff_transferfunction[0])) {
- t2p->tiff_transferfunctioncount = 3;
- t2p->tiff_pages[i].page_extra += 4;
- t2p->pdf_xrefcount += 4;
- } else {
- t2p->tiff_transferfunctioncount = 1;
- t2p->tiff_pages[i].page_extra += 2;
- t2p->pdf_xrefcount += 2;
- }
- if(t2p->pdf_minorversion < 2)
- t2p->pdf_minorversion = 2;
+ &(tiff_transferfunction[0]),
+ &(tiff_transferfunction[1]),
+ &(tiff_transferfunction[2]))) {
+
+ if((tiff_transferfunction[1] != (uint16*) NULL) &&
+ (tiff_transferfunction[2] != (uint16*) NULL)
+ ) {
+ tiff_transferfunctioncount=3;
+ } else {
+ tiff_transferfunctioncount=1;
+ }
} else {
- t2p->tiff_transferfunctioncount=0;
+ tiff_transferfunctioncount=0;
}
+
+ if (i > 0){
+ if (tiff_transferfunctioncount != t2p->tiff_transferfunctioncount){
+ TIFFError(
+ TIFF2PDF_MODULE,
+ "Different transfer function on page %d",
+ i);
+ t2p->t2p_error = T2P_ERR_ERROR;
+ return;
+ }
+ }
+
+ t2p->tiff_transferfunctioncount = tiff_transferfunctioncount;
+ t2p->tiff_transferfunction[0] = tiff_transferfunction[0];
+ t2p->tiff_transferfunction[1] = tiff_transferfunction[1];
+ t2p->tiff_transferfunction[2] = tiff_transferfunction[2];
+ if(tiff_transferfunctioncount == 3){
+ t2p->tiff_pages[i].page_extra += 4;
+ t2p->pdf_xrefcount += 4;
+ if(t2p->pdf_minorversion < 2)
+ t2p->pdf_minorversion = 2;
+ } else if (tiff_transferfunctioncount == 1){
+ t2p->tiff_pages[i].page_extra += 2;
+ t2p->pdf_xrefcount += 2;
+ if(t2p->pdf_minorversion < 2)
+ t2p->pdf_minorversion = 2;
+ }
+
if( TIFFGetField(
input,
TIFFTAG_ICCPROFILE,
@@ -1827,10 +1851,9 @@ void t2p_read_tiff_data(T2P* t2p, TIFF* input){
&(t2p->tiff_transferfunction[0]),
&(t2p->tiff_transferfunction[1]),
&(t2p->tiff_transferfunction[2]))) {
- if((t2p->tiff_transferfunction[1] != (float*) NULL) &&
- (t2p->tiff_transferfunction[2] != (float*) NULL) &&
- (t2p->tiff_transferfunction[1] !=
- t2p->tiff_transferfunction[0])) {
+ if((t2p->tiff_transferfunction[1] != (uint16*) NULL) &&
+ (t2p->tiff_transferfunction[2] != (uint16*) NULL)
+ ) {
t2p->tiff_transferfunctioncount=3;
} else {
t2p->tiff_transferfunctioncount=1;

31
srcpkgs/tiff/patches/CVE-2018-10963.patch Normal file
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@ -0,0 +1,31 @@
From de144fd228e4be8aa484c3caf3d814b6fa88c6d9 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 12 May 2018 14:24:15 +0200
Subject: [PATCH] TIFFWriteDirectorySec: avoid assertion. Fixes
http://bugzilla.maptools.org/show_bug.cgi?id=2795. CVE-2018-10963
---
libtiff/tif_dirwrite.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libtiff/tif_dirwrite.c b/libtiff/tif_dirwrite.c
index 2430de6d0..c15a28dbd 100644
--- a/libtiff/tif_dirwrite.c
+++ b/libtiff/tif_dirwrite.c
@@ -697,8 +697,11 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64* pdiroff)
}
break;
default:
- assert(0); /* we should never get here */
- break;
+ TIFFErrorExt(tif->tif_clientdata,module,
+ "Cannot write tag %d (%s)",
+ TIFFFieldTag(o),
+ o->field_name ? o->field_name : "unknown");
+ goto bad;
}
}
}
--
2.17.1

105
srcpkgs/tiff/patches/CVE-2018-5784.patch Normal file
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@ -0,0 +1,105 @@
diff --git a/contrib/addtiffo/tif_overview.c b/contrib/addtiffo/tif_overview.c
index c61ffbb..03b3573 100644
--- a/contrib/addtiffo/tif_overview.c
+++ b/contrib/addtiffo/tif_overview.c
@@ -65,6 +65,8 @@
# define MAX(a,b) ((a>b) ? a : b)
#endif
+#define TIFF_DIR_MAX 65534
+
void TIFFBuildOverviews( TIFF *, int, int *, int, const char *,
int (*)(double,void*), void * );
@@ -91,6 +93,7 @@ uint32 TIFF_WriteOverview( TIFF *hTIFF, uint32 nXSize, uint32 nYSize,
{
toff_t nBaseDirOffset;
toff_t nOffset;
+ tdir_t iNumDir;
(void) bUseSubIFDs;
@@ -147,7 +150,16 @@ uint32 TIFF_WriteOverview( TIFF *hTIFF, uint32 nXSize, uint32 nYSize,
return 0;
TIFFWriteDirectory( hTIFF );
- TIFFSetDirectory( hTIFF, (tdir_t) (TIFFNumberOfDirectories(hTIFF)-1) );
+ iNumDir = TIFFNumberOfDirectories(hTIFF);
+ if( iNumDir > TIFF_DIR_MAX )
+ {
+ TIFFErrorExt( TIFFClientdata(hTIFF),
+ "TIFF_WriteOverview",
+ "File `%s' has too many directories.\n",
+ TIFFFileName(hTIFF) );
+ exit(-1);
+ }
+ TIFFSetDirectory( hTIFF, (tdir_t) (iNumDir - 1) );
nOffset = TIFFCurrentDirOffset( hTIFF );
diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c
index 984ef65..832a247 100644
--- a/tools/tiff2pdf.c
+++ b/tools/tiff2pdf.c
@@ -68,6 +68,8 @@ extern int getopt(int, char**, char*);
#define PS_UNIT_SIZE 72.0F
+#define TIFF_DIR_MAX 65534
+
/* This type is of PDF color spaces. */
typedef enum {
T2P_CS_BILEVEL = 0x01, /* Bilevel, black and white */
@@ -1051,6 +1053,14 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){
uint16* tiff_transferfunction[3];
directorycount=TIFFNumberOfDirectories(input);
+ if(directorycount > TIFF_DIR_MAX) {
+ TIFFError(
+ TIFF2PDF_MODULE,
+ "TIFF contains too many directories, %s",
+ TIFFFileName(input));
+ t2p->t2p_error = T2P_ERR_ERROR;
+ return;
+ }
t2p->tiff_pages = (T2P_PAGE*) _TIFFmalloc(TIFFSafeMultiply(tmsize_t,directorycount,sizeof(T2P_PAGE)));
if(t2p->tiff_pages==NULL){
TIFFError(
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 91a38f6..e466dae 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -217,6 +217,8 @@ extern int getopt(int argc, char * const argv[], const char *optstring);
#define DUMP_TEXT 1
#define DUMP_RAW 2
+#define TIFF_DIR_MAX 65534
+
/* Offsets into buffer for margins and fixed width and length segments */
struct offset {
uint32 tmargin;
@@ -2233,7 +2235,7 @@ main(int argc, char* argv[])
pageNum = -1;
else
total_images = 0;
- /* read multiple input files and write to output file(s) */
+ /* Read multiple input files and write to output file(s) */
while (optind < argc - 1)
{
in = TIFFOpen (argv[optind], "r");
@@ -2241,7 +2243,14 @@ main(int argc, char* argv[])
return (-3);
/* If only one input file is specified, we can use directory count */
- total_images = TIFFNumberOfDirectories(in);
+ total_images = TIFFNumberOfDirectories(in);
+ if (total_images > TIFF_DIR_MAX)
+ {
+ TIFFError (TIFFFileName(in), "File contains too many directories");
+ if (out != NULL)
+ (void) TIFFClose(out);
+ return (1);
+ }
if (image_count == 0)
{
dirnum = 0;

170
srcpkgs/tiff/patches/CVE-2018-7456.patch Normal file
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@ -0,0 +1,170 @@
From be4c85b16e8801a16eec25e80eb9f3dd6a96731b Mon Sep 17 00:00:00 2001
From: Hugo Lefeuvre <hle@debian.org>
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.
---
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
@@ -167,6 +167,7 @@ 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 );
@@ -3507,6 +3508,35 @@ 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.
*/
@@ -3522,6 +3552,7 @@ 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))
@@ -4026,6 +4057,37 @@ 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
@@ -546,7 +546,7 @@ 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);
--
libgit2 0.27.0

52
srcpkgs/tiff/patches/CVE-2018-8905.patch Normal file
View file

@ -0,0 +1,52 @@
From 58a898cb4459055bb488ca815c23b880c242a27d Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Sat, 12 May 2018 15:32:31 +0200
Subject: [PATCH] LZWDecodeCompat(): fix potential index-out-of-bounds write.
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2780 / CVE-2018-8905
The fix consists in using the similar code LZWDecode() to validate we
don't write outside of the output buffer.
---
libtiff/tif_lzw.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/libtiff/tif_lzw.c b/libtiff/tif_lzw.c
index 4ccb443c8..94d85e38b 100644
--- a/libtiff/tif_lzw.c
+++ b/libtiff/tif_lzw.c
@@ -604,6 +604,7 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s)
char *tp;
unsigned char *bp;
int code, nbits;
+ int len;
long nextbits, nextdata, nbitsmask;
code_t *codep, *free_entp, *maxcodep, *oldcodep;
@@ -755,13 +756,18 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s)
} while (--occ);
break;
}
- assert(occ >= codep->length);
- op += codep->length;
- occ -= codep->length;
- tp = op;
+ len = codep->length;
+ tp = op + len;
do {
- *--tp = codep->value;
- } while( (codep = codep->next) != NULL );
+ int t;
+ --tp;
+ t = codep->value;
+ codep = codep->next;
+ *tp = (char)t;
+ } while (codep && tp > op);
+ assert(occ >= len);
+ op += len;
+ occ -= len;
} else {
*op++ = (char)code;
occ--;
--
2.17.1

5
srcpkgs/tiff/template
View file

@ -1,7 +1,8 @@
# Template build file for 'tiff'.
# Template file for 'tiff'
pkgname=tiff
version=4.0.9
revision=1
revision=2
patch_args="-Np1"
build_style=gnu-configure
configure_args="--enable-cxx --without-x"
hostmakedepends="automake libtool"