File php-CVE-2016-6291.patch of Package php5.openSUSE_Leap_42.1_Update
X-Git-Url: http://72.52.91.13:8000/?p=php-src.git;a=blobdiff_plain;f=ext%2Fexif%2Fexif.c;h=760e7460c3ef9ff6b4ce6e0a76eedcf22ce0b517;hp=f366acc552b833af05c402be1c85c28cfd1581e6;hb=eebcbd5de38a0f1c2876035402cb770e37476519;hpb=3798eb6fd5dddb211b01d41495072fd9858d4e32
Index: php-5.6.1/ext/exif/exif.c
===================================================================
--- php-5.6.1.orig/ext/exif/exif.c 2016-08-03 10:13:28.967918184 +0200
+++ php-5.6.1/ext/exif/exif.c 2016-08-03 10:23:15.181424252 +0200
@@ -2737,6 +2737,12 @@ static int exif_process_IFD_in_MAKERNOTE
break;
}
+ if (maker_note->offset >= value_len) {
+ /* Do not go past the value end */
+ exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "IFD data too short: 0x%04X offset 0x%04X", value_len, maker_note->offset);
+ return FALSE;
+ }
+
dir_start = value_ptr + maker_note->offset;
#ifdef EXIF_DEBUG
@@ -2765,10 +2771,19 @@ static int exif_process_IFD_in_MAKERNOTE
offset_base = value_ptr;
break;
case MN_OFFSET_GUESS:
+ if (maker_note->offset + 10 + 4 >= value_len) {
+ /* Can not read dir_start+10 since it's beyond value end */
+ exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "IFD data too short: 0x%04X", value_len);
+ return FALSE;
+ }
offset_diff = 2 + NumDirEntries*12 + 4 - php_ifd_get32u(dir_start+10, ImageInfo->motorola_intel);
#ifdef EXIF_DEBUG
exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Using automatic offset correction: 0x%04X", ((int)dir_start-(int)offset_base+maker_note->offset+displacement) + offset_diff);
#endif
+ if (offset_diff < 0 || offset_diff >= value_len ) {
+ exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "IFD data bad offset: 0x%04X length 0x%04X", offset_diff, value_len);
+ return FALSE;
+ }
offset_base = value_ptr + offset_diff;
break;
default:
@@ -2777,7 +2792,7 @@ static int exif_process_IFD_in_MAKERNOTE
}
if ((2+NumDirEntries*12) > value_len) {
- exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 2 + x%04X*12 = x%04X > x%04X", NumDirEntries, 2+NumDirEntries*12, value_len);
+ exif_error_docref("exif_read_data#error_ifd" EXIFERR_CC, ImageInfo, E_WARNING, "Illegal IFD size: 2 + 0x%04X*12 = 0x%04X > 0x%04X", NumDirEntries, 2+NumDirEntries*12, value_len);
return FALSE;
}
@@ -3063,7 +3078,10 @@ static int exif_process_IFD_TAG(image_in
break;
case TAG_MAKER_NOTE:
- exif_process_IFD_in_MAKERNOTE(ImageInfo, value_ptr, byte_count, offset_base, IFDlength, displacement TSRMLS_CC);
+ if (!exif_process_IFD_in_MAKERNOTE(ImageInfo, value_ptr, byte_count, offset_base, IFDlength, displacement)) {
+ EFREE_IF(outside);
+ return FALSE;
+ }
break;
case TAG_EXIF_IFD_POINTER: