diff options
Diffstat (limited to 'graphics/tiff/patches/patch-ax')
-rw-r--r-- | graphics/tiff/patches/patch-ax | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/graphics/tiff/patches/patch-ax b/graphics/tiff/patches/patch-ax new file mode 100644 index 00000000000..314c70fc336 --- /dev/null +++ b/graphics/tiff/patches/patch-ax @@ -0,0 +1,308 @@ +$NetBSD: patch-ax,v 1.5 2006/08/02 15:42:25 salo Exp $ + +Security fix for SA21304. + +--- libtiff/tif_dirread.c.orig 2006-03-21 17:42:50.000000000 +0100 ++++ libtiff/tif_dirread.c 2006-08-02 17:18:41.000000000 +0200 +@@ -81,6 +81,7 @@ TIFFReadDirectory(TIFF* tif) + uint16 dircount; + toff_t nextdiroff; + int diroutoforderwarning = 0; ++ int compressionknown = 0; + toff_t* new_dirlist; + + tif->tif_diroff = tif->tif_nextdiroff; +@@ -147,13 +148,20 @@ TIFFReadDirectory(TIFF* tif) + } else { + toff_t off = tif->tif_diroff; + +- if (off + sizeof (uint16) > tif->tif_size) { ++ /* ++ * Check for integer overflow when validating the dir_off, otherwise ++ * a very high offset may cause an OOB read and crash the client. ++ * -- taviso@google.com, 14 Jun 2006. ++ */ ++ if (off + sizeof (uint16) > tif->tif_size || ++ off + sizeof (uint16) < off) { + TIFFErrorExt(tif->tif_clientdata, module, + "%s: Can not read TIFF directory count", + tif->tif_name); + return (0); + } else +- _TIFFmemcpy(&dircount, tif->tif_base + off, sizeof (uint16)); ++ _TIFFmemcpy(&dircount, tif->tif_base + off, ++ sizeof (uint16)); + off += sizeof (uint16); + if (tif->tif_flags & TIFF_SWAB) + TIFFSwabShort(&dircount); +@@ -254,6 +262,7 @@ TIFFReadDirectory(TIFF* tif) + while (fix < tif->tif_nfields && + tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) + fix++; ++ + if (fix >= tif->tif_nfields || + tif->tif_fieldinfo[fix]->field_tag != dp->tdir_tag) { + +@@ -264,17 +273,23 @@ TIFFReadDirectory(TIFF* tif) + dp->tdir_tag, + dp->tdir_tag, + dp->tdir_type); ++ /* ++ * creating anonymous fields prior to knowing the compression ++ * algorithm (ie, when the field info has been merged) could cause ++ * crashes with pathological directories. ++ * -- taviso@google.com 15 Jun 2006 ++ */ ++ if (compressionknown) ++ TIFFMergeFieldInfo(tif, _TIFFCreateAnonFieldInfo(tif, dp->tdir_tag, ++ (TIFFDataType) dp->tdir_type), 1 ); ++ else goto ignore; + +- TIFFMergeFieldInfo(tif, +- _TIFFCreateAnonFieldInfo(tif, +- dp->tdir_tag, +- (TIFFDataType) dp->tdir_type), +- 1 ); + fix = 0; + while (fix < tif->tif_nfields && + tif->tif_fieldinfo[fix]->field_tag < dp->tdir_tag) + fix++; + } ++ + /* + * Null out old tags that we ignore. + */ +@@ -326,6 +341,7 @@ TIFFReadDirectory(TIFF* tif) + dp->tdir_type, dp->tdir_offset); + if (!TIFFSetField(tif, dp->tdir_tag, (uint16)v)) + goto bad; ++ else compressionknown++; + break; + /* XXX: workaround for broken TIFFs */ + } else if (dp->tdir_type == TIFF_LONG) { +@@ -540,6 +556,7 @@ TIFFReadDirectory(TIFF* tif) + * Attempt to deal with a missing StripByteCounts tag. + */ + if (!TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) { ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, TIFFTAG_STRIPBYTECOUNTS); + /* + * Some manufacturers violate the spec by not giving + * the size of the strips. In this case, assume there +@@ -556,7 +573,7 @@ TIFFReadDirectory(TIFF* tif) + "%s: TIFF directory is missing required " + "\"%s\" field, calculating from imagelength", + tif->tif_name, +- _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); ++ fip ? fip->field_name : "Unknown"); + if (EstimateStripByteCounts(tif, dir, dircount) < 0) + goto bad; + /* +@@ -580,6 +597,7 @@ TIFFReadDirectory(TIFF* tif) + } else if (td->td_nstrips == 1 + && td->td_stripoffset[0] != 0 + && BYTECOUNTLOOKSBAD) { ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, TIFFTAG_STRIPBYTECOUNTS); + /* + * XXX: Plexus (and others) sometimes give a value of zero for + * a tag when they don't know what the correct value is! Try +@@ -589,13 +607,14 @@ TIFFReadDirectory(TIFF* tif) + TIFFWarningExt(tif->tif_clientdata, module, + "%s: Bogus \"%s\" field, ignoring and calculating from imagelength", + tif->tif_name, +- _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); ++ fip ? fip->field_name : "Unknown"); + if(EstimateStripByteCounts(tif, dir, dircount) < 0) + goto bad; + } else if (td->td_planarconfig == PLANARCONFIG_CONTIG + && td->td_nstrips > 2 + && td->td_compression == COMPRESSION_NONE + && td->td_stripbytecount[0] != td->td_stripbytecount[1]) { ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, TIFFTAG_STRIPBYTECOUNTS); + /* + * XXX: Some vendors fill StripByteCount array with absolutely + * wrong values (it can be equal to StripOffset array, for +@@ -604,7 +623,7 @@ TIFFReadDirectory(TIFF* tif) + TIFFWarningExt(tif->tif_clientdata, module, + "%s: Wrong \"%s\" field, ignoring and calculating from imagelength", + tif->tif_name, +- _TIFFFieldWithTag(tif,TIFFTAG_STRIPBYTECOUNTS)->field_name); ++ fip ? fip->field_name : "Unknown"); + if (EstimateStripByteCounts(tif, dir, dircount) < 0) + goto bad; + } +@@ -870,7 +889,13 @@ EstimateStripByteCounts(TIFF* tif, TIFFD + + register TIFFDirEntry *dp; + register TIFFDirectory *td = &tif->tif_dir; +- uint16 i; ++ ++ /* i is used to iterate over td->td_nstrips, so must be ++ * at least the same width. ++ * -- taviso@google.com 15 Jun 2006 ++ */ ++ ++ uint32 i; + + if (td->td_stripbytecount) + _TIFFfree(td->td_stripbytecount); +@@ -947,16 +972,18 @@ MissingRequired(TIFF* tif, const char* t + static int + CheckDirCount(TIFF* tif, TIFFDirEntry* dir, uint32 count) + { ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dir->tdir_tag); ++ + if (count > dir->tdir_count) { + TIFFWarningExt(tif->tif_clientdata, tif->tif_name, + "incorrect count for field \"%s\" (%lu, expecting %lu); tag ignored", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, ++ fip ? fip->field_name : "Unknown", + dir->tdir_count, count); + return (0); + } else if (count < dir->tdir_count) { + TIFFWarningExt(tif->tif_clientdata, tif->tif_name, + "incorrect count for field \"%s\" (%lu, expecting %lu); tag trimmed", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, ++ fip ? fip->field_name : "Unknown", + dir->tdir_count, count); + return (1); + } +@@ -970,6 +997,7 @@ static tsize_t + TIFFFetchData(TIFF* tif, TIFFDirEntry* dir, char* cp) + { + int w = TIFFDataWidth((TIFFDataType) dir->tdir_type); ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + tsize_t cc = dir->tdir_count * w; + + /* Check for overflow. */ +@@ -1013,7 +1041,7 @@ TIFFFetchData(TIFF* tif, TIFFDirEntry* d + bad: + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Error fetching data for field \"%s\"", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); ++ fip ? fip->field_name : "Unknown"); + return (tsize_t) 0; + } + +@@ -1039,10 +1067,12 @@ TIFFFetchString(TIFF* tif, TIFFDirEntry* + static int + cvtRational(TIFF* tif, TIFFDirEntry* dir, uint32 num, uint32 denom, float* rv) + { ++ const TIFFFieldInfo* fip; + if (denom == 0) { ++ fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%s: Rational with zero denominator (num = %lu)", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name, num); ++ fip ? fip->field_name : "Unknown", num); + return (0); + } else { + if (dir->tdir_type == TIFF_RATIONAL) +@@ -1159,6 +1189,20 @@ TIFFFetchShortArray(TIFF* tif, TIFFDirEn + static int + TIFFFetchShortPair(TIFF* tif, TIFFDirEntry* dir) + { ++ /* ++ * Prevent overflowing the v stack arrays below by performing a sanity ++ * check on tdir_count, this should never be greater than two. ++ * -- taviso@google.com 14 Jun 2006. ++ */ ++ if (dir->tdir_count > 2) { ++ const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dir->tdir_tag); ++ TIFFWarningExt(tif->tif_clientdata, tif->tif_name, ++ "unexpected count for field \"%s\", %lu, expected 2; ignored.", ++ fip ? fip->field_name : "Unknown", ++ dir->tdir_count); ++ return 0; ++ } ++ + switch (dir->tdir_type) { + case TIFF_BYTE: + case TIFF_SBYTE: +@@ -1329,14 +1373,15 @@ TIFFFetchAnyArray(TIFF* tif, TIFFDirEntr + case TIFF_DOUBLE: + return (TIFFFetchDoubleArray(tif, dir, (double*) v)); + default: ++ { const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + /* TIFF_NOTYPE */ + /* TIFF_ASCII */ + /* TIFF_UNDEFINED */ + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "cannot read TIFF_ANY type %d for field \"%s\"", + dir->tdir_type, +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); +- return (0); ++ fip ? fip->field_name : "Unknown"); ++ return (0); } + } + return (1); + } +@@ -1351,6 +1396,9 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEnt + int ok = 0; + const TIFFFieldInfo* fip = _TIFFFieldWithTag(tif, dp->tdir_tag); + ++ if (fip == NULL) { ++ return (0); ++ } + if (dp->tdir_count > 1) { /* array of values */ + char* cp = NULL; + +@@ -1493,6 +1541,7 @@ static int + TIFFFetchPerSampleShorts(TIFF* tif, TIFFDirEntry* dir, uint16* pl) + { + uint16 samples = tif->tif_dir.td_samplesperpixel; ++ const TIFFFieldInfo* fip; + int status = 0; + + if (CheckDirCount(tif, dir, (uint32) samples)) { +@@ -1510,9 +1559,10 @@ TIFFFetchPerSampleShorts(TIFF* tif, TIFF + + for (i = 1; i < check_count; i++) + if (v[i] != v[0]) { ++ fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Cannot handle different per-sample values for field \"%s\"", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); ++ fip ? fip->field_name : "Unknown"); + goto bad; + } + *pl = v[0]; +@@ -1534,6 +1584,7 @@ static int + TIFFFetchPerSampleLongs(TIFF* tif, TIFFDirEntry* dir, uint32* pl) + { + uint16 samples = tif->tif_dir.td_samplesperpixel; ++ const TIFFFieldInfo* fip; + int status = 0; + + if (CheckDirCount(tif, dir, (uint32) samples)) { +@@ -1551,9 +1602,10 @@ TIFFFetchPerSampleLongs(TIFF* tif, TIFFD + check_count = samples; + for (i = 1; i < check_count; i++) + if (v[i] != v[0]) { ++ fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Cannot handle different per-sample values for field \"%s\"", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); ++ fip ? fip->field_name : "Unknown"); + goto bad; + } + *pl = v[0]; +@@ -1574,6 +1626,7 @@ static int + TIFFFetchPerSampleAnys(TIFF* tif, TIFFDirEntry* dir, double* pl) + { + uint16 samples = tif->tif_dir.td_samplesperpixel; ++ const TIFFFieldInfo* fip; + int status = 0; + + if (CheckDirCount(tif, dir, (uint32) samples)) { +@@ -1591,9 +1644,10 @@ TIFFFetchPerSampleAnys(TIFF* tif, TIFFDi + + for (i = 1; i < check_count; i++) + if (v[i] != v[0]) { ++ fip = _TIFFFieldWithTag(tif, dir->tdir_tag); + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "Cannot handle different per-sample values for field \"%s\"", +- _TIFFFieldWithTag(tif, dir->tdir_tag)->field_name); ++ fip ? fip->field_name : "Unknown"); + goto bad; + } + *pl = v[0]; |