diff options
Diffstat (limited to 'third_party/libtiff/0020-upstream-security-fixes.patch')
| -rw-r--r-- | third_party/libtiff/0020-upstream-security-fixes.patch | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/third_party/libtiff/0020-upstream-security-fixes.patch b/third_party/libtiff/0020-upstream-security-fixes.patch new file mode 100644 index 0000000000..139b79ddeb --- /dev/null +++ b/third_party/libtiff/0020-upstream-security-fixes.patch @@ -0,0 +1,270 @@ +diff --git a/third_party/libtiff/tif_dir.c b/third_party/libtiff/tif_dir.c +index 4b3632ab1..81b849374 100644 +--- a/third_party/libtiff/tif_dir.c ++++ b/third_party/libtiff/tif_dir.c +@@ -862,6 +862,32 @@ _TIFFVGetField(TIFF* tif, uint32 tag, va_list ap) + if( fip == NULL ) /* cannot happen since TIFFGetField() already checks it */ + return 0; + ++ if( tag == TIFFTAG_NUMBEROFINKS ) ++ { ++ int i; ++ for (i = 0; i < td->td_customValueCount; i++) { ++ uint16 val; ++ TIFFTagValue *tv = td->td_customValues + i; ++ if (tv->info->field_tag != tag) ++ continue; ++ val = *(uint16 *)tv->value; ++ /* Truncate to SamplesPerPixel, since the */ ++ /* setting code for INKNAMES assume that there are SamplesPerPixel */ ++ /* inknames. */ ++ /* Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2599 */ ++ if( val > td->td_samplesperpixel ) ++ { ++ TIFFWarningExt(tif->tif_clientdata,"_TIFFVGetField", ++ "Truncating NumberOfInks from %u to %u", ++ val, td->td_samplesperpixel); ++ val = td->td_samplesperpixel; ++ } ++ *va_arg(ap, uint16*) = val; ++ return 1; ++ } ++ return 0; ++ } ++ + /* + * We want to force the custom code to be used for custom + * fields even if the tag happens to match a well known +diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c +index d50b39a80..7dbcf6d86 100644 +--- a/third_party/libtiff/tif_dirread.c ++++ b/third_party/libtiff/tif_dirread.c +@@ -5503,8 +5503,7 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + uint64 rowblockbytes; + uint64 stripbytes; + uint32 strip; +- uint64 nstrips64; +- uint32 nstrips32; ++ uint32 nstrips; + uint32 rowsperstrip; + uint64* newcounts; + uint64* newoffsets; +@@ -5535,18 +5534,17 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + return; + + /* +- * never increase the number of strips in an image ++ * never increase the number of rows per strip + */ + if (rowsperstrip >= td->td_rowsperstrip) + return; +- nstrips64 = TIFFhowmany_64(bytecount, stripbytes); +- if ((nstrips64==0)||(nstrips64>0xFFFFFFFF)) /* something is wonky, do nothing. */ +- return; +- nstrips32 = (uint32)nstrips64; ++ nstrips = TIFFhowmany_32(td->td_imagelength, rowsperstrip); ++ if( nstrips == 0 ) ++ return; + +- newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), ++ newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), + "for chopped \"StripByteCounts\" array"); +- newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), ++ newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), + "for chopped \"StripOffsets\" array"); + if (newcounts == NULL || newoffsets == NULL) { + /* +@@ -5563,18 +5561,18 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + * Fill the strip information arrays with new bytecounts and offsets + * that reflect the broken-up format. + */ +- for (strip = 0; strip < nstrips32; strip++) { ++ for (strip = 0; strip < nstrips; strip++) { + if (stripbytes > bytecount) + stripbytes = bytecount; + newcounts[strip] = stripbytes; +- newoffsets[strip] = offset; ++ newoffsets[strip] = stripbytes ? offset : 0; + offset += stripbytes; + bytecount -= stripbytes; + } + /* + * Replace old single strip info with multi-strip info. + */ +- td->td_stripsperimage = td->td_nstrips = nstrips32; ++ td->td_stripsperimage = td->td_nstrips = nstrips; + TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip); + + _TIFFfree(td->td_stripbytecount); +diff --git a/third_party/libtiff/tif_luv.c b/third_party/libtiff/tif_luv.c +index ca08f30a7..220c15034 100644 +--- a/third_party/libtiff/tif_luv.c ++++ b/third_party/libtiff/tif_luv.c +@@ -158,6 +158,7 @@ + typedef struct logLuvState LogLuvState; + + struct logLuvState { ++ int encoder_state; /* 1 if encoder correctly initialized */ + int user_datafmt; /* user data format */ + int encode_meth; /* encoding method */ + int pixel_size; /* bytes per pixel */ +@@ -1552,6 +1553,7 @@ LogLuvSetupEncode(TIFF* tif) + td->td_photometric, "must be either LogLUV or LogL"); + break; + } ++ sp->encoder_state = 1; + return (1); + notsupported: + TIFFErrorExt(tif->tif_clientdata, module, +@@ -1563,19 +1565,27 @@ notsupported: + static void + LogLuvClose(TIFF* tif) + { ++ LogLuvState* sp = (LogLuvState*) tif->tif_data; + TIFFDirectory *td = &tif->tif_dir; + ++ assert(sp != 0); + /* + * For consistency, we always want to write out the same + * bitspersample and sampleformat for our TIFF file, + * regardless of the data format being used by the application. + * Since this routine is called after tags have been set but + * before they have been recorded in the file, we reset them here. ++ * Note: this is really a nasty approach. See PixarLogClose + */ +- td->td_samplesperpixel = +- (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; +- td->td_bitspersample = 16; +- td->td_sampleformat = SAMPLEFORMAT_INT; ++ if( sp->encoder_state ) ++ { ++ /* See PixarLogClose. Might avoid issues with tags whose size depends ++ * on those below, but not completely sure this is enough. */ ++ td->td_samplesperpixel = ++ (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; ++ td->td_bitspersample = 16; ++ td->td_sampleformat = SAMPLEFORMAT_INT; ++ } + } + + static void +diff --git a/third_party/libtiff/tif_ojpeg.c b/third_party/libtiff/tif_ojpeg.c +index e128887bf..cb84be96b 100644 +--- a/third_party/libtiff/tif_ojpeg.c ++++ b/third_party/libtiff/tif_ojpeg.c +@@ -253,6 +253,7 @@ typedef enum { + + typedef struct { + TIFF* tif; ++ int decoder_ok; + #ifndef LIBJPEG_ENCAP_EXTERNAL + JMP_BUF exit_jmpbuf; + #endif +@@ -731,6 +732,7 @@ OJPEGPreDecode(TIFF* tif, uint16 s) + } + sp->write_curstrile++; + } ++ sp->decoder_ok = 1; + return(1); + } + +@@ -793,8 +795,14 @@ OJPEGPreDecodeSkipScanlines(TIFF* tif) + static int + OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s) + { ++ static const char module[]="OJPEGDecode"; + OJPEGState* sp=(OJPEGState*)tif->tif_data; + (void)s; ++ if( !sp->decoder_ok ) ++ { ++ TIFFErrorExt(tif->tif_clientdata,module,"Cannot decode: decoder not correctly initialized"); ++ return 0; ++ } + if (sp->libjpeg_jpeg_query_style==0) + { + if (OJPEGDecodeRaw(tif,buf,cc)==0) +diff --git a/third_party/libtiff/tif_pixarlog.c b/third_party/libtiff/tif_pixarlog.c +index 8f6ca8f63..e6574ec3d 100644 +--- a/third_party/libtiff/tif_pixarlog.c ++++ b/third_party/libtiff/tif_pixarlog.c +@@ -1233,8 +1233,10 @@ PixarLogPostEncode(TIFF* tif) + static void + PixarLogClose(TIFF* tif) + { ++ PixarLogState* sp = (PixarLogState*) tif->tif_data; + TIFFDirectory *td = &tif->tif_dir; + ++ assert(sp != 0); + /* In a really sneaky (and really incorrect, and untruthful, and + * troublesome, and error-prone) maneuver that completely goes against + * the spirit of TIFF, and breaks TIFF, on close, we covertly +@@ -1243,8 +1245,19 @@ PixarLogClose(TIFF* tif) + * readers that don't know about PixarLog, or how to set + * the PIXARLOGDATFMT pseudo-tag. + */ +- td->td_bitspersample = 8; +- td->td_sampleformat = SAMPLEFORMAT_UINT; ++ ++ if (sp->state&PLSTATE_INIT) { ++ /* We test the state to avoid an issue such as in ++ * http://bugzilla.maptools.org/show_bug.cgi?id=2604 ++ * What appends in that case is that the bitspersample is 1 and ++ * a TransferFunction is set. The size of the TransferFunction ++ * depends on 1<<bitspersample. So if we increase it, an access ++ * out of the buffer will happen at directory flushing. ++ * Another option would be to clear those targs. ++ */ ++ td->td_bitspersample = 8; ++ td->td_sampleformat = SAMPLEFORMAT_UINT; ++ } + } + + static void +diff --git a/third_party/libtiff/tif_read.c b/third_party/libtiff/tif_read.c +index 795153bbf..1ba100e54 100644 +--- a/third_party/libtiff/tif_read.c ++++ b/third_party/libtiff/tif_read.c +@@ -346,7 +346,7 @@ TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) + rowsperstrip=td->td_rowsperstrip; + if (rowsperstrip>td->td_imagelength) + rowsperstrip=td->td_imagelength; +- stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip); ++ stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip); + stripinplane=(strip%stripsperplane); + plane=(uint16)(strip/stripsperplane); + rows=td->td_imagelength-stripinplane*rowsperstrip; +diff --git a/third_party/libtiff/tif_strip.c b/third_party/libtiff/tif_strip.c +index b6098dd31..3b55285cd 100644 +--- a/third_party/libtiff/tif_strip.c ++++ b/third_party/libtiff/tif_strip.c +@@ -63,15 +63,6 @@ TIFFNumberOfStrips(TIFF* tif) + TIFFDirectory *td = &tif->tif_dir; + uint32 nstrips; + +- /* If the value was already computed and store in td_nstrips, then return it, +- since ChopUpSingleUncompressedStrip might have altered and resized the +- since the td_stripbytecount and td_stripoffset arrays to the new value +- after the initial affectation of td_nstrips = TIFFNumberOfStrips() in +- tif_dirread.c ~line 3612. +- See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */ +- if( td->td_nstrips ) +- return td->td_nstrips; +- + nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : + TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip)); + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) +diff --git a/third_party/libtiff/tiffiop.h b/third_party/libtiff/tiffiop.h +index b6db1e932..1925a6b5e 100644 +--- a/third_party/libtiff/tiffiop.h ++++ b/third_party/libtiff/tiffiop.h +@@ -249,6 +249,10 @@ struct tiff { + #define TIFFhowmany_32(x, y) (((uint32)x < (0xffffffff - (uint32)(y-1))) ? \ + ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y))) : \ + 0U) ++/* Variant of TIFFhowmany_32() that doesn't return 0 if x close to MAXUINT. */ ++/* Caution: TIFFhowmany_32_maxuint_compat(x,y)*y might overflow */ ++#define TIFFhowmany_32_maxuint_compat(x, y) \ ++ (((uint32)(x) / (uint32)(y)) + ((((uint32)(x) % (uint32)(y)) != 0) ? 1 : 0)) + #define TIFFhowmany8_32(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3) + #define TIFFroundup_32(x, y) (TIFFhowmany_32(x,y)*(y)) + #define TIFFhowmany_64(x, y) ((((uint64)(x))+(((uint64)(y))-1))/((uint64)(y))) |