diff options
Diffstat (limited to 'php-bug77540.patch')
| -rw-r--r-- | php-bug77540.patch | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/php-bug77540.patch b/php-bug77540.patch new file mode 100644 index 0000000..643891d --- /dev/null +++ b/php-bug77540.patch @@ -0,0 +1,104 @@ +Backported for 7.0 by remi +without binary diff + + + +From 5e824a88d073d282c4f358f186cb87ddc284f83d Mon Sep 17 00:00:00 2001 +From: Stanislav Malyshev <stas@php.net> +Date: Fri, 1 Mar 2019 23:25:45 -0800 +Subject: [PATCH] Fix integer overflows on 32-bits + +--- + ext/exif/exif.c | 14 +++++++------- + 1 file changed, 7 insertions(+), 7 deletions(-) + +diff --git a/ext/exif/exif.c b/ext/exif/exif.c +index cbde3effedf9..b4563927a505 100644 +--- a/ext/exif/exif.c ++++ b/ext/exif/exif.c +@@ -3566,10 +3566,10 @@ static int exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offse + tag_table_type tag_table = exif_get_tag_table(section_index); + + if (ImageInfo->ifd_nesting_level > MAX_IFD_NESTING_LEVEL) { +- return FALSE; +- } ++ return FALSE; ++ } + +- if (ImageInfo->FileSize >= dir_offset+2) { ++ if (ImageInfo->FileSize >= 2 && ImageInfo->FileSize - 2 >= dir_offset) { + sn = exif_file_sections_add(ImageInfo, M_PSEUDO, 2, NULL); + #ifdef EXIF_DEBUG + exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, 2); +@@ -3577,8 +3577,8 @@ static int exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offse + php_stream_seek(ImageInfo->infile, dir_offset, SEEK_SET); /* we do not know the order of sections */ + php_stream_read(ImageInfo->infile, (char*)ImageInfo->file.list[sn].data, 2); + num_entries = php_ifd_get16u(ImageInfo->file.list[sn].data, ImageInfo->motorola_intel); +- dir_size = 2/*num dir entries*/ +12/*length of entry*/*num_entries +4/* offset to next ifd (points to thumbnail or NULL)*/; +- if (ImageInfo->FileSize >= dir_offset+dir_size) { ++ dir_size = 2/*num dir entries*/ +12/*length of entry*/*(size_t)num_entries +4/* offset to next ifd (points to thumbnail or NULL)*/; ++ if (ImageInfo->FileSize >= dir_size && ImageInfo->FileSize - dir_size >= dir_offset) { + #ifdef EXIF_DEBUG + exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_NOTICE, "Read from TIFF: filesize(x%04X), IFD dir(x%04X + x%04X), IFD entries(%d)", ImageInfo->FileSize, dir_offset+2, dir_size-2, num_entries); + #endif +@@ -3661,9 +3661,9 @@ static int exif_process_IFD_in_TIFF(image_info_type *ImageInfo, size_t dir_offse + } + } + } +- if (ImageInfo->FileSize >= dir_offset + ImageInfo->file.list[sn].size) { ++ if (ImageInfo->FileSize >= ImageInfo->file.list[sn].size && ImageInfo->FileSize - ImageInfo->file.list[sn].size >= dir_offset) { + if (ifd_size > dir_size) { +- if (dir_offset + ifd_size > ImageInfo->FileSize) { ++ if (ImageInfo->FileSize < ifd_size || dir_offset > ImageInfo->FileSize - ifd_size) { + exif_error_docref(NULL EXIFERR_CC, ImageInfo, E_WARNING, "Error in TIFF: filesize(x%04X) less than size of IFD(x%04X + x%04X)", ImageInfo->FileSize, dir_offset, ifd_size); + return FALSE; + } +From 5f0e62a3e5b525163e538aaab0161c2c8c5d057b Mon Sep 17 00:00:00 2001 +From: Stanislav Malyshev <stas@php.net> +Date: Sat, 2 Mar 2019 13:38:00 -0800 +Subject: [PATCH] Fix bug #77540 - Invalid Read on exif_process_SOFn + +--- + ext/exif/exif.c | 10 ++++++++-- + ext/exif/tests/bug77540.jpg | Bin 0 -> 91 bytes + ext/exif/tests/bug77540.phpt | 16 ++++++++++++++++ + 3 files changed, 24 insertions(+), 2 deletions(-) + create mode 100644 ext/exif/tests/bug77540.jpg + create mode 100644 ext/exif/tests/bug77540.phpt + +diff --git a/ext/exif/exif.c b/ext/exif/exif.c +index b4563927a505..ea88a8f115e8 100644 +--- a/ext/exif/exif.c ++++ b/ext/exif/exif.c +@@ -3508,7 +3508,7 @@ static int exif_scan_thumbnail(image_info_type *ImageInfo) + return FALSE; + marker = c; + length = php_jpg_get16(data+pos); +- if (pos+length>=ImageInfo->Thumbnail.size) { ++ if (length > ImageInfo->Thumbnail.size || pos >= ImageInfo->Thumbnail.size - length) { + return FALSE; + } + #ifdef EXIF_DEBUG +@@ -3529,6 +3529,10 @@ static int exif_scan_thumbnail(image_info_type *ImageInfo) + case M_SOF14: + case M_SOF15: + /* handle SOFn block */ ++ if (length < 8 || ImageInfo->Thumbnail.size - 8 < pos) { ++ /* exif_process_SOFn needs 8 bytes */ ++ return FALSE; ++ } + exif_process_SOFn(data+pos, marker, &sof_info); + ImageInfo->Thumbnail.height = sof_info.height; + ImageInfo->Thumbnail.width = sof_info.width; +@@ -4176,7 +4180,9 @@ PHP_FUNCTION(exif_thumbnail) + ZVAL_STRINGL(return_value, ImageInfo.Thumbnail.data, ImageInfo.Thumbnail.size); + if (arg_c >= 3) { + if (!ImageInfo.Thumbnail.width || !ImageInfo.Thumbnail.height) { +- exif_scan_thumbnail(&ImageInfo); ++ if (!exif_scan_thumbnail(&ImageInfo)) { ++ ImageInfo.Thumbnail.width = ImageInfo.Thumbnail.height = 0; ++ } + } + zval_dtor(p_width); + zval_dtor(p_height); + |