ALT Linux Sisyphus

diff -up cups-1.2.4/filter/image-png.c.CVE-2008-1722 cups-1.2.4/filter/image-png.c

--- cups-1.2.4/filter/image-png.c.CVE-2008-1722	2006-05-11 12:41:36.000000000 +0100
+++ cups-1.2.4/filter/image-png.c	2008-05-13 11:01:32.000000000 +0100
@@ -3,6 +3,7 @@
  *
  *   PNG image routines for the Common UNIX Printing System (CUPS).
  *
+ *   Copyright 2007-2008 by Apple Inc.
  *   Copyright 1993-2006 by Easy Software Products.
  *
  *   These coded instructions, statements, and computer programs are the
@@ -179,16 +180,56 @@ _cupsImageReadPNG(
     * Interlaced images must be loaded all at once...
     */
 
+    size_t bufsize;			/* Size of buffer */
+
+
     if (color_type == PNG_COLOR_TYPE_GRAY ||
 	color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
-      in = malloc(img->xsize * img->ysize);
+    {
+      bufsize = img->xsize * img->ysize;
+
+      if ((bufsize / img->ysize) != img->xsize)
+      {
+	fprintf(stderr, "DEBUG: PNG image dimensions (%ux%u) too large!\n",
+		(unsigned)img->xsize, (unsigned)img->ysize);
+	fclose(fp);
+	return (1);
+      }
+    }
     else
-      in = malloc(img->xsize * img->ysize * 3);
+    {
+      bufsize = img->xsize * img->ysize * 3;
+
+      if ((bufsize / (img->ysize * 3)) != img->xsize)
+      {
+	fprintf(stderr, "DEBUG: PNG image dimensions (%ux%u) too large!\n",
+		(unsigned)img->xsize, (unsigned)img->ysize);
+	fclose(fp);
+	return (1);
+      }
+    }
+
+    in = malloc(bufsize);
   }
 
   bpp = cupsImageGetDepth(img);
   out = malloc(img->xsize * bpp);
 
+  if (!in || !out)
+  {
+    fputs("DEBUG: Unable to allocate memory for PNG image!\n", stderr);
+
+    if (in)
+      free(in);
+
+    if (out)
+      free(out);
+
+    fclose(fp);
+
+    return (1);
+  }
+
  /*
   * Read the image, interlacing as needed...
   */

S:	2.4.7-alt1
5.1:	1.4.2-alt1.M51.2
4.1:	1.3.10-alt0.M41.4
+updates:	1.3.9-alt1.M41.1
4.0:	1.2.12-alt6.M40.9
+updates:	1.2.12-alt6.M40.8
3.0:	1.1.20-alt14.1