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From 5c080298d59efa53264d7248bbe3a04660db6ef7 Mon Sep 17 00:00:00 2001
From: erouault <erouault>
Date: Wed, 11 Jan 2017 19:25:44 +0000
Subject: [PATCH] * tools/tiffcp.c: error out cleanly in cpContig2SeparateByRow
and cpSeparate2ContigByRow if BitsPerSample != 8 to avoid heap based
overflow. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2656 and
http://bugzilla.maptools.org/show_bug.cgi?id=2657
---
ChangeLog | 7 +++++++
tools/tiffcp.c | 24 ++++++++++++++++++++++--
2 files changed, 29 insertions(+), 2 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index f78cad0..064f25b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2017-01-11 Even Rouault <even.rouault at spatialys.com>
+
+ * tools/tiffcp.c: error out cleanly in cpContig2SeparateByRow and
+ cpSeparate2ContigByRow if BitsPerSample != 8 to avoid heap based overflow.
+ Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2656 and
+ http://bugzilla.maptools.org/show_bug.cgi?id=2657
+
2016-12-20 Even Rouault <even.rouault at spatialys.com>
* tools/tiff2pdf.c: avoid potential heap-based overflow in
diff --git a/tools/tiffcp.c b/tools/tiffcp.c
index bdf754c..8bbcd52 100644
--- a/tools/tiffcp.c
+++ b/tools/tiffcp.c
@@ -591,7 +591,7 @@ static copyFunc pickCopyFunc(TIFF*, TIFF*, uint16, uint16);
static int
tiffcp(TIFF* in, TIFF* out)
{
- uint16 bitspersample, samplesperpixel = 1;
+ uint16 bitspersample = 1, samplesperpixel = 1;
uint16 input_compression, input_photometric = PHOTOMETRIC_MINISBLACK;
copyFunc cf;
uint32 width, length;
@@ -1067,6 +1067,16 @@ DECLAREcpFunc(cpContig2SeparateByRow)
register uint32 n;
uint32 row;
tsample_t s;
+ uint16 bps = 0;
+
+ (void) TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bps);
+ if( bps != 8 )
+ {
+ TIFFError(TIFFFileName(in),
+ "Error, can only handle BitsPerSample=8 in %s",
+ "cpContig2SeparateByRow");
+ return 0;
+ }
inbuf = _TIFFmalloc(scanlinesizein);
outbuf = _TIFFmalloc(scanlinesizeout);
@@ -1120,6 +1130,16 @@ DECLAREcpFunc(cpSeparate2ContigByRow)
register uint32 n;
uint32 row;
tsample_t s;
+ uint16 bps = 0;
+
+ (void) TIFFGetField(in, TIFFTAG_BITSPERSAMPLE, &bps);
+ if( bps != 8 )
+ {
+ TIFFError(TIFFFileName(in),
+ "Error, can only handle BitsPerSample=8 in %s",
+ "cpSeparate2ContigByRow");
+ return 0;
+ }
inbuf = _TIFFmalloc(scanlinesizein);
outbuf = _TIFFmalloc(scanlinesizeout);
@@ -1784,7 +1804,7 @@ pickCopyFunc(TIFF* in, TIFF* out, uint16 bitspersample, uint16 samplesperpixel)
uint32 w, l, tw, tl;
int bychunk;
- (void) TIFFGetField(in, TIFFTAG_PLANARCONFIG, &shortv);
+ (void) TIFFGetFieldDefaulted(in, TIFFTAG_PLANARCONFIG, &shortv);
if (shortv != config && bitspersample != 8 && samplesperpixel > 1) {
fprintf(stderr,
"%s: Cannot handle different planar configuration w/ bits/sample != 8\n",