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From fddff26550de7a5ea9735649a74aa3829e461ae5 Mon Sep 17 00:00:00 2001
From: 4ugustus <wangdw.augustus@qq.com>
Date: Sat, 11 Jun 2022 09:31:43 +0000
Subject: [PATCH] (CVE-2022-2056 CVE-2022-2057 CVE-2022-2058) fix the FPE in
tiffcrop (#415, #427, and #428)
(cherry picked from commit dd1bcc7abb26094e93636e85520f0d8f81ab0fab)
---
libtiff/tif_aux.c | 9 +++++++
libtiff/tiffiop.h | 1 +
tools/tiffcrop.c | 62 ++++++++++++++++++++++++++---------------------
3 files changed, 44 insertions(+), 28 deletions(-)
diff --git a/libtiff/tif_aux.c b/libtiff/tif_aux.c
index 2071d19c..4d1869b4 100644
--- a/libtiff/tif_aux.c
+++ b/libtiff/tif_aux.c
@@ -408,6 +408,15 @@ float _TIFFClampDoubleToFloat( double val )
return (float)val;
}
+uint32 _TIFFClampDoubleToUInt32(double val)
+{
+ if( val < 0 )
+ return 0;
+ if( val > 0xFFFFFFFFU || val != val )
+ return 0xFFFFFFFFU;
+ return (uint32)val;
+}
+
int _TIFFSeekOK(TIFF* tif, toff_t off)
{
/* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
diff --git a/libtiff/tiffiop.h b/libtiff/tiffiop.h
index 05ba735b..5b106e03 100644
--- a/libtiff/tiffiop.h
+++ b/libtiff/tiffiop.h
@@ -378,6 +378,7 @@ extern double _TIFFUInt64ToDouble(uint64);
extern float _TIFFUInt64ToFloat(uint64);
extern float _TIFFClampDoubleToFloat(double);
+extern uint32 _TIFFClampDoubleToUInt32(double);
extern tmsize_t
_TIFFReadEncodedStripAndAllocBuffer(TIFF* tif, uint32 strip,
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 83cf80ad..ea0b98be 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -5140,17 +5140,17 @@ computeInputPixelOffsets(struct crop_mask *crop, struct image_data *image,
{
if ((crop->res_unit == RESUNIT_INCH) || (crop->res_unit == RESUNIT_CENTIMETER))
{
- x1 = (uint32) (crop->corners[i].X1 * scale * xres);
- x2 = (uint32) (crop->corners[i].X2 * scale * xres);
- y1 = (uint32) (crop->corners[i].Y1 * scale * yres);
- y2 = (uint32) (crop->corners[i].Y2 * scale * yres);
+ x1 = _TIFFClampDoubleToUInt32(crop->corners[i].X1 * scale * xres);
+ x2 = _TIFFClampDoubleToUInt32(crop->corners[i].X2 * scale * xres);
+ y1 = _TIFFClampDoubleToUInt32(crop->corners[i].Y1 * scale * yres);
+ y2 = _TIFFClampDoubleToUInt32(crop->corners[i].Y2 * scale * yres);
}
else
{
- x1 = (uint32) (crop->corners[i].X1);
- x2 = (uint32) (crop->corners[i].X2);
- y1 = (uint32) (crop->corners[i].Y1);
- y2 = (uint32) (crop->corners[i].Y2);
+ x1 = _TIFFClampDoubleToUInt32(crop->corners[i].X1);
+ x2 = _TIFFClampDoubleToUInt32(crop->corners[i].X2);
+ y1 = _TIFFClampDoubleToUInt32(crop->corners[i].Y1);
+ y2 = _TIFFClampDoubleToUInt32(crop->corners[i].Y2);
}
if (x1 < 1)
crop->regionlist[i].x1 = 0;
@@ -5213,17 +5213,17 @@ computeInputPixelOffsets(struct crop_mask *crop, struct image_data *image,
{
if (crop->res_unit != RESUNIT_INCH && crop->res_unit != RESUNIT_CENTIMETER)
{ /* User has specified pixels as reference unit */
- tmargin = (uint32)(crop->margins[0]);
- lmargin = (uint32)(crop->margins[1]);
- bmargin = (uint32)(crop->margins[2]);
- rmargin = (uint32)(crop->margins[3]);
+ tmargin = _TIFFClampDoubleToUInt32(crop->margins[0]);
+ lmargin = _TIFFClampDoubleToUInt32(crop->margins[1]);
+ bmargin = _TIFFClampDoubleToUInt32(crop->margins[2]);
+ rmargin = _TIFFClampDoubleToUInt32(crop->margins[3]);
}
else
{ /* inches or centimeters specified */
- tmargin = (uint32)(crop->margins[0] * scale * yres);
- lmargin = (uint32)(crop->margins[1] * scale * xres);
- bmargin = (uint32)(crop->margins[2] * scale * yres);
- rmargin = (uint32)(crop->margins[3] * scale * xres);
+ tmargin = _TIFFClampDoubleToUInt32(crop->margins[0] * scale * yres);
+ lmargin = _TIFFClampDoubleToUInt32(crop->margins[1] * scale * xres);
+ bmargin = _TIFFClampDoubleToUInt32(crop->margins[2] * scale * yres);
+ rmargin = _TIFFClampDoubleToUInt32(crop->margins[3] * scale * xres);
}
if ((lmargin + rmargin) > image->width)
@@ -5253,24 +5253,24 @@ computeInputPixelOffsets(struct crop_mask *crop, struct image_data *image,
if (crop->res_unit != RESUNIT_INCH && crop->res_unit != RESUNIT_CENTIMETER)
{
if (crop->crop_mode & CROP_WIDTH)
- width = (uint32)crop->width;
+ width = _TIFFClampDoubleToUInt32(crop->width);
else
width = image->width - lmargin - rmargin;
if (crop->crop_mode & CROP_LENGTH)
- length = (uint32)crop->length;
+ length = _TIFFClampDoubleToUInt32(crop->length);
else
length = image->length - tmargin - bmargin;
}
else
{
if (crop->crop_mode & CROP_WIDTH)
- width = (uint32)(crop->width * scale * image->xres);
+ width = _TIFFClampDoubleToUInt32(crop->width * scale * image->xres);
else
width = image->width - lmargin - rmargin;
if (crop->crop_mode & CROP_LENGTH)
- length = (uint32)(crop->length * scale * image->yres);
+ length = _TIFFClampDoubleToUInt32(crop->length * scale * image->yres);
else
length = image->length - tmargin - bmargin;
}
@@ -5669,13 +5669,13 @@ computeOutputPixelOffsets (struct crop_mask *crop, struct image_data *image,
{
if (page->res_unit == RESUNIT_INCH || page->res_unit == RESUNIT_CENTIMETER)
{ /* inches or centimeters specified */
- hmargin = (uint32)(page->hmargin * scale * page->hres * ((image->bps + 7)/ 8));
- vmargin = (uint32)(page->vmargin * scale * page->vres * ((image->bps + 7)/ 8));
+ hmargin = _TIFFClampDoubleToUInt32(page->hmargin * scale * page->hres * ((image->bps + 7) / 8));
+ vmargin = _TIFFClampDoubleToUInt32(page->vmargin * scale * page->vres * ((image->bps + 7) / 8));
}
else
{ /* Otherwise user has specified pixels as reference unit */
- hmargin = (uint32)(page->hmargin * scale * ((image->bps + 7)/ 8));
- vmargin = (uint32)(page->vmargin * scale * ((image->bps + 7)/ 8));
+ hmargin = _TIFFClampDoubleToUInt32(page->hmargin * scale * ((image->bps + 7) / 8));
+ vmargin = _TIFFClampDoubleToUInt32(page->vmargin * scale * ((image->bps + 7) / 8));
}
if ((hmargin * 2.0) > (pwidth * page->hres))
@@ -5713,13 +5713,13 @@ computeOutputPixelOffsets (struct crop_mask *crop, struct image_data *image,
{
if (page->mode & PAGE_MODE_PAPERSIZE )
{
- owidth = (uint32)((pwidth * page->hres) - (hmargin * 2));
- olength = (uint32)((plength * page->vres) - (vmargin * 2));
+ owidth = _TIFFClampDoubleToUInt32((pwidth * page->hres) - (hmargin * 2));
+ olength = _TIFFClampDoubleToUInt32((plength * page->vres) - (vmargin * 2));
}
else
{
- owidth = (uint32)(iwidth - (hmargin * 2 * page->hres));
- olength = (uint32)(ilength - (vmargin * 2 * page->vres));
+ owidth = _TIFFClampDoubleToUInt32(iwidth - (hmargin * 2 * page->hres));
+ olength = _TIFFClampDoubleToUInt32(ilength - (vmargin * 2 * page->vres));
}
}
@@ -5728,6 +5728,12 @@ computeOutputPixelOffsets (struct crop_mask *crop, struct image_data *image,
if (olength > ilength)
olength = ilength;
+ if (owidth == 0 || olength == 0)
+ {
+ TIFFError("computeOutputPixelOffsets", "Integer overflow when calculating the number of pages");
+ exit(EXIT_FAILURE);
+ }
+
/* Compute the number of pages required for Portrait or Landscape */
switch (page->orient)
{
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