php/sme8/php-5.3.3-CVE-2011-4566.patch

From 774d031d3e860ccb63acb3defdeb91e8f3fdf515 Mon Sep 17 00:00:00 2001
From: "Vojtech Vitek (V-Teq)" <vvitek@redhat.com>
Date: Tue, 3 Jan 2012 02:36:51 +0100
Subject: [PATCH] Fix integer overflow during the parsing of invalid exif
 header

Based on:
http://svn.php.net/viewvc/?view=revision&revision=319535
http://svn.php.net/viewvc/?view=revision&revision=319534
---
 ext/exif/exif.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/exif/exif.c b/ext/exif/exif.c
index 85fa1b9..ecfb402 100644
--- a/ext/exif/exif.c
+++ b/ext/exif/exif.c
@@ -2856,11 +2856,11 @@ static int exif_process_IFD_TAG(image_info_type *ImageInfo, char *dir_entry, cha
                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 */
-- 
1.7.6.2

1	slords	1.2	From 774d031d3e860ccb63acb3defdeb91e8f3fdf515 Mon Sep 17 00:00:00 2001
2			From: "Vojtech Vitek (V-Teq)" <vvitek@redhat.com>
3			Date: Tue, 3 Jan 2012 02:36:51 +0100
4			Subject: [PATCH] Fix integer overflow during the parsing of invalid exif
5			header
6
7			Based on:
8			http://svn.php.net/viewvc/?view=revision&revision=319535
9			http://svn.php.net/viewvc/?view=revision&revision=319534
10			---
11			ext/exif/exif.c \| 4 ++--
12			1 files changed, 2 insertions(+), 2 deletions(-)
13
14			diff --git a/ext/exif/exif.c b/ext/exif/exif.c
15			index 85fa1b9..ecfb402 100644
16			--- a/ext/exif/exif.c
17			+++ b/ext/exif/exif.c
18			@@ -2856,11 +2856,11 @@ static int exif_process_IFD_TAG(image_info_type ImageInfo, char dir_entry, cha
19			offset_val = php_ifd_get32u(dir_entry+8, ImageInfo->motorola_intel);
20			/* If its bigger than 4 bytes, the dir entry contains an offset. */
21			value_ptr = offset_base+offset_val;
22			- if (offset_val+byte_count > IFDlength \|\| value_ptr < dir_entry) {
23			+ if (byte_count > IFDlength \|\| offset_val > IFDlength-byte_count \|\| value_ptr < dir_entry) {
24			/* It is important to check for IMAGE_FILETYPE_TIFF
25			* JPEG does not use absolute pointers instead its pointers are
26			* relative to the start of the TIFF header in APP1 section. */
27			- if (offset_val+byte_count>ImageInfo->FileSize \|\| (ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_II && ImageInfo->FileType!=IMAGE_FILETYPE_TIFF_MM && ImageInfo->FileType!=IMAGE_FILETYPE_JPEG)) {
28			+ 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)) {
29			if (value_ptr < dir_entry) {
30			/* we can read this if offset_val > 0 */
31			/* some files have their values in other parts of the file */
32			--
33			1.7.6.2
34