diff options
author | erouault <erouault> | 2014-12-21 15:15:31 +0000 |
---|---|---|
committer | erouault <erouault> | 2014-12-21 15:15:31 +0000 |
commit | 90e422289f0c164aec9976e8ae0e5b5124cb9231 (patch) | |
tree | ef1429f08c2be6f7daf2d681eb44964bc0b7b5be | |
parent | 259c61e8d58a3908e2fdf7fd232565c71358fc27 (diff) | |
download | libtiff-90e422289f0c164aec9976e8ae0e5b5124cb9231.tar.gz |
Fix various crasher bugs on fuzzed images.
* libtiff/tif_dir.c: TIFFSetField(): refuse to set negative values for
TIFFTAG_XRESOLUTION and TIFFTAG_YRESOLUTION that cause asserts when writing
the directory
* libtiff/tif_dirread.c: TIFFReadDirectory(): refuse to read ColorMap or
TransferFunction if BitsPerSample has not yet been read, otherwise reading
it later will cause user code to crash if BitsPerSample > 1
* libtiff/tif_getimage.c: TIFFRGBAImageOK(): return FALSE if LOGLUV with
SamplesPerPixel != 3, or if CIELAB with SamplesPerPixel != 3 or BitsPerSample != 8
* libtiff/tif_next.c: in the "run mode", use tilewidth for tiled images
instead of imagewidth to avoid crash
* tools/bmp2tiff.c: fix crash due to int overflow related to input BMP dimensions
* tools/tiff2pdf.c: fix crash due to invalid tile count (should likely be checked by
libtiff too). Detect invalid settings of BitsPerSample/SamplesPerPixel for CIELAB / ITULAB
* tools/tiffcrop.c: fix crash due to invalid TileWidth/TileHeight
* tools/tiffdump.c: fix crash due to overflow of entry count.
-rw-r--r-- | ChangeLog | 19 | ||||
-rw-r--r-- | libtiff/tif_dir.c | 23 | ||||
-rw-r--r-- | libtiff/tif_dirread.c | 19 | ||||
-rw-r--r-- | libtiff/tif_getimage.c | 17 | ||||
-rw-r--r-- | libtiff/tif_next.c | 4 | ||||
-rw-r--r-- | tools/bmp2tiff.c | 17 | ||||
-rw-r--r-- | tools/tiff2pdf.c | 43 | ||||
-rw-r--r-- | tools/tiffcrop.c | 9 | ||||
-rw-r--r-- | tools/tiffdump.c | 11 |
9 files changed, 146 insertions, 16 deletions
@@ -1,3 +1,22 @@ +2014-12-21 Even Rouault <even.rouault@spatialys.com> + + Fix various crasher bugs on fuzzed images. + * libtiff/tif_dir.c: TIFFSetField(): refuse to set negative values for + TIFFTAG_XRESOLUTION and TIFFTAG_YRESOLUTION that cause asserts when writing + the directory + * libtiff/tif_dirread.c: TIFFReadDirectory(): refuse to read ColorMap or + TransferFunction if BitsPerSample has not yet been read, otherwise reading + it later will cause user code to crash if BitsPerSample > 1 + * libtiff/tif_getimage.c: TIFFRGBAImageOK(): return FALSE if LOGLUV with + SamplesPerPixel != 3, or if CIELAB with SamplesPerPixel != 3 or BitsPerSample != 8 + * libtiff/tif_next.c: in the "run mode", use tilewidth for tiled images + instead of imagewidth to avoid crash + * tools/bmp2tiff.c: fix crash due to int overflow related to input BMP dimensions + * tools/tiff2pdf.c: fix crash due to invalid tile count (should likely be checked by + libtiff too). Detect invalid settings of BitsPerSample/SamplesPerPixel for CIELAB / ITULAB + * tools/tiffcrop.c: fix crash due to invalid TileWidth/TileHeight + * tools/tiffdump.c: fix crash due to overflow of entry count. + 2014-12-15 Even Rouault <even.rouault@spatialys.com> * libtiff/tif_jpeg.c: Fix regression introduced on 2010-05-07 that caused diff --git a/libtiff/tif_dir.c b/libtiff/tif_dir.c index 2535de20..daead652 100644 --- a/libtiff/tif_dir.c +++ b/libtiff/tif_dir.c @@ -1,4 +1,4 @@ -/* $Id: tif_dir.c,v 1.117 2014-11-20 16:47:21 erouault Exp $ */ +/* $Id: tif_dir.c,v 1.118 2014-12-21 15:15:31 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -160,6 +160,7 @@ _TIFFVSetField(TIFF* tif, uint32 tag, va_list ap) TIFFDirectory* td = &tif->tif_dir; int status = 1; uint32 v32, i, v; + double dblval; char* s; const TIFFField *fip = TIFFFindField(tif, tag, TIFF_ANY); uint32 standard_tag = tag; @@ -284,10 +285,16 @@ _TIFFVSetField(TIFF* tif, uint32 tag, va_list ap) setDoubleArrayOneValue(&td->td_smaxsamplevalue, va_arg(ap, double), td->td_samplesperpixel); break; case TIFFTAG_XRESOLUTION: - td->td_xresolution = (float) va_arg(ap, double); + dblval = va_arg(ap, double); + if( dblval < 0 ) + goto badvaluedouble; + td->td_xresolution = (float) dblval; break; case TIFFTAG_YRESOLUTION: - td->td_yresolution = (float) va_arg(ap, double); + dblval = va_arg(ap, double); + if( dblval < 0 ) + goto badvaluedouble; + td->td_yresolution = (float) dblval; break; case TIFFTAG_PLANARCONFIG: v = (uint16) va_arg(ap, uint16_vap); @@ -694,6 +701,16 @@ badvalue32: va_end(ap); } return (0); +badvaluedouble: + { + const TIFFField* fip=TIFFFieldWithTag(tif,tag); + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Bad value %f for \"%s\" tag", + tif->tif_name, dblval, + fip ? fip->field_name : "Unknown"); + va_end(ap); + } + return (0); } /* diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c index 6e15b99f..0f051d11 100644 --- a/libtiff/tif_dirread.c +++ b/libtiff/tif_dirread.c @@ -1,4 +1,4 @@ -/* $Id: tif_dirread.c,v 1.180 2014-11-20 16:47:21 erouault Exp $ */ +/* $Id: tif_dirread.c,v 1.181 2014-12-21 15:15:31 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -3430,6 +3430,8 @@ TIFFReadDirectory(TIFF* tif) const TIFFField* fip; uint32 fii=FAILED_FII; toff_t nextdiroff; + int bitspersample_read = FALSE; + tif->tif_diroff=tif->tif_nextdiroff; if (!TIFFCheckDirOffset(tif,tif->tif_nextdiroff)) return 0; /* last offset or bad offset (IFD looping) */ @@ -3706,6 +3708,8 @@ TIFFReadDirectory(TIFF* tif) } if (!TIFFSetField(tif,dp->tdir_tag,value)) goto bad; + if( dp->tdir_tag == TIFFTAG_BITSPERSAMPLE ) + bitspersample_read = TRUE; } break; case TIFFTAG_SMINSAMPLEVALUE: @@ -3763,6 +3767,19 @@ TIFFReadDirectory(TIFF* tif) uint32 countrequired; uint32 incrementpersample; uint16* value=NULL; + /* It would be dangerous to instanciate those tag values */ + /* since if td_bitspersample has not yet been read (due to */ + /* unordered tags), it could be read afterwards with a */ + /* values greater than the default one (1), which may cause */ + /* crashes in user code */ + if( !bitspersample_read ) + { + fip = TIFFFieldWithTag(tif,dp->tdir_tag); + TIFFWarningExt(tif->tif_clientdata,module, + "Ignoring %s since BitsPerSample tag not found", + fip ? fip->field_name : "unknown tagname"); + continue; + } countpersample=(1L<<tif->tif_dir.td_bitspersample); if ((dp->tdir_tag==TIFFTAG_TRANSFERFUNCTION)&&(dp->tdir_count==(uint64)countpersample)) { diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c index a85273cc..068be6e7 100644 --- a/libtiff/tif_getimage.c +++ b/libtiff/tif_getimage.c @@ -1,4 +1,4 @@ -/* $Id: tif_getimage.c,v 1.82 2012-06-06 00:17:49 fwarmerdam Exp $ */ +/* $Id: tif_getimage.c,v 1.83 2014-12-21 15:15:31 erouault Exp $ */ /* * Copyright (c) 1991-1997 Sam Leffler @@ -182,8 +182,23 @@ TIFFRGBAImageOK(TIFF* tif, char emsg[1024]) "Planarconfiguration", td->td_planarconfig); return (0); } + if( td->td_samplesperpixel != 3 ) + { + sprintf(emsg, + "Sorry, can not handle image with %s=%d", + "Samples/pixel", td->td_samplesperpixel); + return 0; + } break; case PHOTOMETRIC_CIELAB: + if( td->td_samplesperpixel != 3 || td->td_bitspersample != 8 ) + { + sprintf(emsg, + "Sorry, can not handle image with %s=%d and %s=%d", + "Samples/pixel", td->td_samplesperpixel, + "Bits/sample", td->td_bitspersample); + return 0; + } break; default: sprintf(emsg, "Sorry, can not handle image with %s=%d", diff --git a/libtiff/tif_next.c b/libtiff/tif_next.c index 524e127c..6bd9233e 100644 --- a/libtiff/tif_next.c +++ b/libtiff/tif_next.c @@ -1,4 +1,4 @@ -/* $Id: tif_next.c,v 1.13 2010-03-10 18:56:48 bfriesen Exp $ */ +/* $Id: tif_next.c,v 1.14 2014-12-21 15:15:32 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -102,6 +102,8 @@ NeXTDecode(TIFF* tif, uint8* buf, tmsize_t occ, uint16 s) default: { uint32 npixels = 0, grey; uint32 imagewidth = tif->tif_dir.td_imagewidth; + if( isTiled(tif) ) + imagewidth = tif->tif_dir.td_tilewidth; /* * The scanline is composed of a sequence of constant diff --git a/tools/bmp2tiff.c b/tools/bmp2tiff.c index c66a8d21..48fcdc2a 100644 --- a/tools/bmp2tiff.c +++ b/tools/bmp2tiff.c @@ -1,4 +1,4 @@ -/* $Id: bmp2tiff.c,v 1.23 2010-03-10 18:56:49 bfriesen Exp $ +/* $Id: bmp2tiff.c,v 1.24 2014-12-21 15:15:32 erouault Exp $ * * Project: libtiff tools * Purpose: Convert Windows BMP files in TIFF. @@ -403,6 +403,13 @@ main(int argc, char* argv[]) width = info_hdr.iWidth; length = (info_hdr.iHeight > 0) ? info_hdr.iHeight : -info_hdr.iHeight; + if( width <= 0 || length <= 0 ) + { + TIFFError(infilename, + "Invalid dimensions of BMP file" ); + close(fd); + return -1; + } switch (info_hdr.iBitCount) { @@ -593,6 +600,14 @@ main(int argc, char* argv[]) compr_size = file_hdr.iSize - file_hdr.iOffBits; uncompr_size = width * length; + /* Detect int overflow */ + if( uncompr_size / width != length ) + { + TIFFError(infilename, + "Invalid dimensions of BMP file" ); + close(fd); + return -1; + } comprbuf = (unsigned char *) _TIFFmalloc( compr_size ); if (!comprbuf) { TIFFError(infilename, diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c index 34354747..ea3d5bd7 100644 --- a/tools/tiff2pdf.c +++ b/tools/tiff2pdf.c @@ -1,4 +1,4 @@ -/* $Id: tiff2pdf.c,v 1.77 2014-12-10 02:53:30 bfriesen Exp $ +/* $Id: tiff2pdf.c,v 1.78 2014-12-21 15:15:32 erouault Exp $ * * tiff2pdf - converts a TIFF image to a PDF document * @@ -1167,6 +1167,15 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){ if( (TIFFGetField(input, TIFFTAG_PLANARCONFIG, &xuint16) != 0) && (xuint16 == PLANARCONFIG_SEPARATE ) ){ TIFFGetField(input, TIFFTAG_SAMPLESPERPIXEL, &xuint16); + if( (t2p->tiff_tiles[i].tiles_tilecount % xuint16) != 0 ) + { + TIFFError( + TIFF2PDF_MODULE, + "Invalid tile count, %s", + TIFFFileName(input)); + t2p->t2p_error = T2P_ERR_ERROR; + return; + } t2p->tiff_tiles[i].tiles_tilecount/= xuint16; } if( t2p->tiff_tiles[i].tiles_tilecount > 0){ @@ -1552,6 +1561,22 @@ void t2p_read_tiff_data(T2P* t2p, TIFF* input){ #endif break; case PHOTOMETRIC_CIELAB: + if( t2p->tiff_samplesperpixel != 3){ + TIFFError( + TIFF2PDF_MODULE, + "Unsupported samplesperpixel = %d for CIELAB", + t2p->tiff_samplesperpixel); + t2p->t2p_error = T2P_ERR_ERROR; + return; + } + if( t2p->tiff_bitspersample != 8){ + TIFFError( + TIFF2PDF_MODULE, + "Invalid bitspersample = %d for CIELAB", + t2p->tiff_bitspersample); + t2p->t2p_error = T2P_ERR_ERROR; + return; + } t2p->pdf_labrange[0]= -127; t2p->pdf_labrange[1]= 127; t2p->pdf_labrange[2]= -127; @@ -1567,6 +1592,22 @@ void t2p_read_tiff_data(T2P* t2p, TIFF* input){ t2p->pdf_colorspace=T2P_CS_LAB; break; case PHOTOMETRIC_ITULAB: + if( t2p->tiff_samplesperpixel != 3){ + TIFFError( + TIFF2PDF_MODULE, + "Unsupported samplesperpixel = %d for ITULAB", + t2p->tiff_samplesperpixel); + t2p->t2p_error = T2P_ERR_ERROR; + return; + } + if( t2p->tiff_bitspersample != 8){ + TIFFError( + TIFF2PDF_MODULE, + "Invalid bitspersample = %d for ITULAB", + t2p->tiff_bitspersample); + t2p->t2p_error = T2P_ERR_ERROR; + return; + } t2p->pdf_labrange[0]=-85; t2p->pdf_labrange[1]=85; t2p->pdf_labrange[2]=-75; diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c index 53182c05..3c5289f0 100644 --- a/tools/tiffcrop.c +++ b/tools/tiffcrop.c @@ -1,4 +1,4 @@ -/* $Id: tiffcrop.c,v 1.23 2014-12-07 22:33:06 erouault Exp $ */ +/* $Id: tiffcrop.c,v 1.24 2014-12-21 15:15:32 erouault Exp $ */ /* tiffcrop.c -- a port of tiffcp.c extended to include manipulations of * the image data through additional options listed below @@ -1205,9 +1205,10 @@ static int writeBufferToContigTiles (TIFF* out, uint8* buf, uint32 imagelength, tsize_t tilesize = TIFFTileSize(out); unsigned char *tilebuf = NULL; - TIFFGetField(out, TIFFTAG_TILELENGTH, &tl); - TIFFGetField(out, TIFFTAG_TILEWIDTH, &tw); - TIFFGetField(out, TIFFTAG_BITSPERSAMPLE, &bps); + if( !TIFFGetField(out, TIFFTAG_TILELENGTH, &tl) || + !TIFFGetField(out, TIFFTAG_TILEWIDTH, &tw) || + !TIFFGetField(out, TIFFTAG_BITSPERSAMPLE, &bps) ) + return 1; tile_buffsize = tilesize; if (tilesize < (tsize_t)(tl * tile_rowsize)) diff --git a/tools/tiffdump.c b/tools/tiffdump.c index 1a0d29cf..12a1e587 100644 --- a/tools/tiffdump.c +++ b/tools/tiffdump.c @@ -1,4 +1,4 @@ -/* $Id: tiffdump.c,v 1.28 2014-12-06 15:58:44 bfriesen Exp $ */ +/* $Id: tiffdump.c,v 1.29 2014-12-21 15:15:32 erouault Exp $ */ /* * Copyright (c) 1988-1997 Sam Leffler @@ -374,6 +374,8 @@ ReadDirectory(int fd, unsigned int ix, uint64 off) void* datamem; uint64 dataoffset; int datatruncated; + int datasizeoverflow; + tag = *(uint16*)dp; if (swabflag) TIFFSwabShort(&tag); @@ -412,13 +414,14 @@ ReadDirectory(int fd, unsigned int ix, uint64 off) else typewidth = datawidth[type]; datasize = count*typewidth; + datasizeoverflow = (typewidth > 0 && datasize / typewidth != count); datafits = 1; datamem = dp; dataoffset = 0; datatruncated = 0; if (!bigtiff) { - if (datasize>4) + if (datasizeoverflow || datasize>4) { uint32 dataoffset32; datafits = 0; @@ -432,7 +435,7 @@ ReadDirectory(int fd, unsigned int ix, uint64 off) } else { - if (datasize>8) + if (datasizeoverflow || datasize>8) { datafits = 0; datamem = NULL; @@ -442,7 +445,7 @@ ReadDirectory(int fd, unsigned int ix, uint64 off) } dp += sizeof(uint64); } - if (datasize>0x10000) + if (datasizeoverflow || datasize>0x10000) { datatruncated = 1; count = 0x10000/typewidth; |