From: Markus Koschany <apo@debian.org>
Date: Tue, 21 Feb 2023 14:26:43 +0100
Subject: CVE-2023-0795

This is also the fix for CVE-2023-0796, CVE-2023-0797, CVE-2023-0798,
CVE-2023-0799.

Bug-Debian: https://bugs.debian.org/1031632
Origin: https://gitlab.com/libtiff/libtiff/-/commit/afaabc3e50d4e5d80a94143f7e3c997e7e410f68
---
 tools/tiffcrop.c | 51 ++++++++++++++++++++++++++++++---------------------
 1 file changed, 30 insertions(+), 21 deletions(-)

Index: tiff-4.2.0/tools/tiffcrop.c
===================================================================
--- tiff-4.2.0.orig/tools/tiffcrop.c
+++ tiff-4.2.0/tools/tiffcrop.c
@@ -278,7 +278,6 @@ struct  region {
   uint32 width;     /* width in pixels */
   uint32 length;    /* length in pixels */
   uint32 buffsize;  /* size of buffer needed to hold the cropped region */
-  unsigned char *buffptr; /* address of start of the region */
 };
 
 /* Cropping parameters from command line and image data 
@@ -533,7 +532,7 @@ static int rotateContigSamples24bits(uin
 static int rotateContigSamples32bits(uint16, uint16, uint16, uint32, 
                                      uint32,   uint32, uint8 *, uint8 *);
 static int rotateImage(uint16, struct image_data *, uint32 *, uint32 *,
- 		       unsigned char **);
+ 		       unsigned char **, int);
 static int mirrorImage(uint16, uint16, uint16, uint32, uint32,
 		       unsigned char *);
 static int invertImage(uint16, uint16, uint16, uint32, uint32,
@@ -5166,7 +5165,6 @@ initCropMasks (struct crop_mask *cps)
      cps->regionlist[i].width = 0;
      cps->regionlist[i].length = 0;
      cps->regionlist[i].buffsize = 0;
-     cps->regionlist[i].buffptr = NULL;
      cps->zonelist[i].position = 0;
      cps->zonelist[i].total = 0;
      }
@@ -6412,8 +6410,13 @@ static int  correct_orientation(struct i
                   image->adjustments & ROTATE_ANY);
       return (-1);
       }
- 
-    if (rotateImage(rotation, image, &image->width, &image->length, work_buff_ptr))
+
+      /* Dummy variable in order not to switch two times the
+       * image->width,->length within rotateImage(),
+       * but switch xres, yres there. */
+      uint32_t width = image->width;
+      uint32_t length = image->length;
+      if (rotateImage(rotation, image, &width, &length, work_buff_ptr, TRUE))
       {
       TIFFError ("correct_orientation", "Unable to rotate image");
       return (-1);
@@ -6481,7 +6484,6 @@ extractCompositeRegions(struct image_dat
     /* These should not be needed for composite images */
     crop->regionlist[i].width = crop_width;
     crop->regionlist[i].length = crop_length;
-    crop->regionlist[i].buffptr = crop_buff;
 
     src_rowsize = ((img_width * bps * spp) + 7) / 8;
     dst_rowsize = (((crop_width * bps * count) + 7) / 8);
@@ -6718,7 +6720,6 @@ extractSeparateRegion(struct image_data
 
   crop->regionlist[region].width = crop_width;
   crop->regionlist[region].length = crop_length;
-  crop->regionlist[region].buffptr = crop_buff;
 
   src = read_buff;
   dst = crop_buff;
@@ -7596,7 +7597,7 @@ processCropSelections(struct image_data
     if (crop->crop_mode & CROP_ROTATE) /* rotate should be last as it can reallocate the buffer */
       {
       if (rotateImage(crop->rotation, image, &crop->combined_width, 
-                      &crop->combined_length, &crop_buff))
+                      &crop->combined_length, &crop_buff, FALSE))
         {
         TIFFError("processCropSelections", 
                   "Failed to rotate composite regions by %d degrees", crop->rotation);
@@ -7702,7 +7703,7 @@ processCropSelections(struct image_data
       if (crop->crop_mode & CROP_ROTATE) /* rotate should be last as it can reallocate the buffer */
         {
 	if (rotateImage(crop->rotation, image, &crop->regionlist[i].width, 
-			&crop->regionlist[i].length, &crop_buff))
+			&crop->regionlist[i].length, &crop_buff, FALSE))
           {
           TIFFError("processCropSelections", 
                     "Failed to rotate crop region by %d degrees", crop->rotation);
@@ -7834,7 +7835,7 @@ createCroppedImage(struct image_data *im
   if (crop->crop_mode & CROP_ROTATE) /* rotate should be last as it can reallocate the buffer */
     {
     if (rotateImage(crop->rotation, image, &crop->combined_width, 
-                    &crop->combined_length, crop_buff_ptr))
+                    &crop->combined_length, crop_buff_ptr, TRUE))
       {
       TIFFError("createCroppedImage", 
                 "Failed to rotate image or cropped selection by %d degrees", crop->rotation);
@@ -8497,7 +8498,7 @@ rotateContigSamples32bits(uint16 rotatio
 /* Rotate an image by a multiple of 90 degrees clockwise */
 static int
 rotateImage(uint16 rotation, struct image_data *image, uint32 *img_width, 
-            uint32 *img_length, unsigned char **ibuff_ptr)
+            uint32 *img_length, unsigned char **ibuff_ptr, int rot_image_params)
   {
   int      shift_width;
   uint32   bytes_per_pixel, bytes_per_sample;
@@ -8688,11 +8689,15 @@ rotateImage(uint16 rotation, struct imag
 
               *img_width = length;
               *img_length = width;
-              image->width = length;
-              image->length = width;
-              res_temp = image->xres;
-              image->xres = image->yres;
-              image->yres = res_temp;
+            /* Only toggle image parameters if whole input image is rotated. */
+            if (rot_image_params)
+            {
+                image->width = length;
+                image->length = width;
+                res_temp = image->xres;
+                image->xres = image->yres;
+                image->yres = res_temp;
+            }
 	      break;
 
     case 270: if ((bps % 8) == 0) /* byte aligned data */
@@ -8765,11 +8770,15 @@ rotateImage(uint16 rotation, struct imag
 
               *img_width = length;
               *img_length = width;
-              image->width = length;
-              image->length = width;
-              res_temp = image->xres;
-              image->xres = image->yres;
-              image->yres = res_temp;
+            /* Only toggle image parameters if whole input image is rotated. */
+            if (rot_image_params)
+            {
+                image->width = length;
+                image->length = width;
+                res_temp = image->xres;
+                image->xres = image->yres;
+                image->yres = res_temp;
+            }
               break;
     default:
               break;