File php-5.2.14-CVE-2011-4566.patch of Package php-5.2.17

http://svn.php.net/viewvc/?view=revision&amp;revision=319535
--- ext/exif/exif.c	2011/11/19 04:41:03	319534
+++ ext/exif/exif.c	2011/11/19 04:49:36	319535
@@ -2874,11 +2874,11 @@
 		offset_val = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
 		/* If its bigger than 4 bytes, the dir entry contains an offset. */
 		value_ptr = offset_base+offset_val;
-		if (offset_val+byte_count > IFDlength || value_ptr < dir_entry) {
+		if (byte_count > IFDlength || offset_val > IFDlength-byte_count || value_ptr < dir_entry) {
 			/* It is important to check for IMAGE_FILETYPE_TIFF
 			 * JPEG does not use absolute pointers instead its pointers are
 			 * relative to the start of the TIFF header in APP1 section. */
-			if (offset_val+byte_count>ImageInfo->FileSize || (ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_II && ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_MM && ImageInfo->FileType!=IMAGE_FILETYPE_JPEG)) {
+			if (byte_count > ImageInfo->FileSize || offset_val>ImageInfo->FileSize-byte_count || (ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_II && ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_MM && ImageInfo->FileType!=IMAGE_FILETYPE_JPEG)) {
 				if (value_ptr < dir_entry) {
 					/* we can read this if offset_val > 0 */
 					/* some files have their values in other parts of the file */