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Copied from Debian
From 8b6e80fca434525497e5a31c3309a3bab5b3c1c8 Mon Sep 17 00:00:00 2001
From: erouault <erouault>
Date: Sun, 21 Dec 2014 18:52:42 +0000
Subject: [PATCH] * tools/thumbnail.c, tools/tiffcmp.c: only read/write
TIFFTAG_GROUP3OPTIONS or TIFFTAG_GROUP4OPTIONS if compression is
COMPRESSION_CCITTFAX3 or COMPRESSION_CCITTFAX4
http://bugzilla.maptools.org/show_bug.cgi?id=2493 (CVE-2014-8128)
---
ChangeLog | 7 +++++++
tools/thumbnail.c | 21 ++++++++++++++++++++-
tools/tiffcmp.c | 17 +++++++++++++++--
3 files changed, 42 insertions(+), 3 deletions(-)
diff --git a/tools/thumbnail.c b/tools/thumbnail.c
index a98a881..fab63f6 100644
--- a/tools/thumbnail.c
+++ b/tools/thumbnail.c
@@ -274,7 +274,26 @@ cpTags(TIFF* in, TIFF* out)
{
struct cpTag *p;
for (p = tags; p < &tags[NTAGS]; p++)
- cpTag(in, out, p->tag, p->count, p->type);
+ {
+ /* Horrible: but TIFFGetField() expects 2 arguments to be passed */
+ /* if we request a tag that is defined in a codec, but that codec */
+ /* isn't used */
+ if( p->tag == TIFFTAG_GROUP3OPTIONS )
+ {
+ uint16 compression;
+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
+ compression != COMPRESSION_CCITTFAX3 )
+ continue;
+ }
+ if( p->tag == TIFFTAG_GROUP4OPTIONS )
+ {
+ uint16 compression;
+ if( !TIFFGetField(in, TIFFTAG_COMPRESSION, &compression) ||
+ compression != COMPRESSION_CCITTFAX4 )
+ continue;
+ }
+ cpTag(in, out, p->tag, p->count, p->type);
+ }
}
#undef NTAGS
diff --git a/tools/tiffcmp.c b/tools/tiffcmp.c
index 508a461..d6392af 100644
--- a/tools/tiffcmp.c
+++ b/tools/tiffcmp.c
@@ -260,6 +260,7 @@ tiffcmp(TIFF* tif1, TIFF* tif2)
static int
cmptags(TIFF* tif1, TIFF* tif2)
{
+ uint16 compression1, compression2;
CmpLongField(TIFFTAG_SUBFILETYPE, "SubFileType");
CmpLongField(TIFFTAG_IMAGEWIDTH, "ImageWidth");
CmpLongField(TIFFTAG_IMAGELENGTH, "ImageLength");
@@ -276,8 +277,20 @@ cmptags(TIFF* tif1, TIFF* tif2)
CmpShortField(TIFFTAG_SAMPLEFORMAT, "SampleFormat");
CmpFloatField(TIFFTAG_XRESOLUTION, "XResolution");
CmpFloatField(TIFFTAG_YRESOLUTION, "YResolution");
- CmpLongField(TIFFTAG_GROUP3OPTIONS, "Group3Options");
- CmpLongField(TIFFTAG_GROUP4OPTIONS, "Group4Options");
+ if( TIFFGetField(tif1, TIFFTAG_COMPRESSION, &compression1) &&
+ compression1 == COMPRESSION_CCITTFAX3 &&
+ TIFFGetField(tif2, TIFFTAG_COMPRESSION, &compression2) &&
+ compression2 == COMPRESSION_CCITTFAX3 )
+ {
+ CmpLongField(TIFFTAG_GROUP3OPTIONS, "Group3Options");
+ }
+ if( TIFFGetField(tif1, TIFFTAG_COMPRESSION, &compression1) &&
+ compression1 == COMPRESSION_CCITTFAX4 &&
+ TIFFGetField(tif2, TIFFTAG_COMPRESSION, &compression2) &&
+ compression2 == COMPRESSION_CCITTFAX4 )
+ {
+ CmpLongField(TIFFTAG_GROUP4OPTIONS, "Group4Options");
+ }
CmpShortField(TIFFTAG_RESOLUTIONUNIT, "ResolutionUnit");
CmpShortField(TIFFTAG_PLANARCONFIG, "PlanarConfiguration");
CmpLongField(TIFFTAG_ROWSPERSTRIP, "RowsPerStrip");
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