diff options
Diffstat (limited to 'meta/recipes-multimedia/libtiff/tiff/CVE-2023-6277-At-image-reading-compare-data-size-of-some-tags-data.patch')
| -rw-r--r-- | meta/recipes-multimedia/libtiff/tiff/CVE-2023-6277-At-image-reading-compare-data-size-of-some-tags-data.patch | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/meta/recipes-multimedia/libtiff/tiff/CVE-2023-6277-At-image-reading-compare-data-size-of-some-tags-data.patch b/meta/recipes-multimedia/libtiff/tiff/CVE-2023-6277-At-image-reading-compare-data-size-of-some-tags-data.patch new file mode 100644 index 0000000000..d5854a9059 --- /dev/null +++ b/meta/recipes-multimedia/libtiff/tiff/CVE-2023-6277-At-image-reading-compare-data-size-of-some-tags-data.patch @@ -0,0 +1,162 @@ +From b33baa5d9c6aac8ce49b5180dd48e39697ab7a11 Mon Sep 17 00:00:00 2001 +From: Su_Laus <sulau@freenet.de> +Date: Fri, 27 Oct 2023 22:11:10 +0200 +Subject: [PATCH 1/3] At image reading, compare data size of some tags / data + structures (StripByteCounts, StripOffsets, StripArray, TIFF directory) with + file size to prevent provoked out-of-memory attacks. + +See issue #614. + +CVE: CVE-2023-6277 +Upstream-Status: Backport [https://gitlab.com/libtiff/libtiff/-/merge_requests/545] +Signed-off-by: Khem Raj <raj.khem@gmail.com> +--- + libtiff/tif_dirread.c | 90 +++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 90 insertions(+) + +diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c +index 2c49dc6..c52d41f 100644 +--- a/libtiff/tif_dirread.c ++++ b/libtiff/tif_dirread.c +@@ -1308,6 +1308,21 @@ TIFFReadDirEntryArrayWithLimit(TIFF *tif, TIFFDirEntry *direntry, + datasize = (*count) * typesize; + assert((tmsize_t)datasize > 0); + ++ /* Before allocating a huge amount of memory for corrupted files, check if ++ * size of requested memory is not greater than file size. ++ */ ++ uint64_t filesize = TIFFGetFileSize(tif); ++ if (datasize > filesize) ++ { ++ TIFFWarningExtR(tif, "ReadDirEntryArray", ++ "Requested memory size for tag %d (0x%x) %" PRIu32 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated, tag not read", ++ direntry->tdir_tag, direntry->tdir_tag, datasize, ++ filesize); ++ return (TIFFReadDirEntryErrAlloc); ++ } ++ + if (isMapped(tif) && datasize > (uint64_t)tif->tif_size) + return TIFFReadDirEntryErrIo; + +@@ -5266,6 +5281,20 @@ static int EstimateStripByteCounts(TIFF *tif, TIFFDirEntry *dir, + if (!_TIFFFillStrilesInternal(tif, 0)) + return -1; + ++ /* Before allocating a huge amount of memory for corrupted files, check if ++ * size of requested memory is not greater than file size. */ ++ uint64_t filesize = TIFFGetFileSize(tif); ++ uint64_t allocsize = (uint64_t)td->td_nstrips * sizeof(uint64_t); ++ if (allocsize > filesize) ++ { ++ TIFFWarningExtR(tif, module, ++ "Requested memory size for StripByteCounts of %" PRIu64 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated", ++ allocsize, filesize); ++ return -1; ++ } ++ + if (td->td_stripbytecount_p) + _TIFFfreeExt(tif, td->td_stripbytecount_p); + td->td_stripbytecount_p = (uint64_t *)_TIFFCheckMalloc( +@@ -5807,6 +5836,20 @@ static uint16_t TIFFFetchDirectory(TIFF *tif, uint64_t diroff, + dircount16 = (uint16_t)dircount64; + dirsize = 20; + } ++ /* Before allocating a huge amount of memory for corrupted files, check ++ * if size of requested memory is not greater than file size. */ ++ uint64_t filesize = TIFFGetFileSize(tif); ++ uint64_t allocsize = (uint64_t)dircount16 * dirsize; ++ if (allocsize > filesize) ++ { ++ TIFFWarningExtR( ++ tif, module, ++ "Requested memory size for TIFF directory of %" PRIu64 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated, TIFF directory not read", ++ allocsize, filesize); ++ return 0; ++ } + origdir = _TIFFCheckMalloc(tif, dircount16, dirsize, + "to read TIFF directory"); + if (origdir == NULL) +@@ -5921,6 +5964,20 @@ static uint16_t TIFFFetchDirectory(TIFF *tif, uint64_t diroff, + "directories not supported"); + return 0; + } ++ /* Before allocating a huge amount of memory for corrupted files, check ++ * if size of requested memory is not greater than file size. */ ++ uint64_t filesize = TIFFGetFileSize(tif); ++ uint64_t allocsize = (uint64_t)dircount16 * dirsize; ++ if (allocsize > filesize) ++ { ++ TIFFWarningExtR( ++ tif, module, ++ "Requested memory size for TIFF directory of %" PRIu64 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated, TIFF directory not read", ++ allocsize, filesize); ++ return 0; ++ } + origdir = _TIFFCheckMalloc(tif, dircount16, dirsize, + "to read TIFF directory"); + if (origdir == NULL) +@@ -5968,6 +6025,8 @@ static uint16_t TIFFFetchDirectory(TIFF *tif, uint64_t diroff, + } + } + } ++ /* No check against filesize needed here because "dir" should have same size ++ * than "origdir" checked above. */ + dir = (TIFFDirEntry *)_TIFFCheckMalloc( + tif, dircount16, sizeof(TIFFDirEntry), "to read TIFF directory"); + if (dir == 0) +@@ -7164,6 +7223,20 @@ static int TIFFFetchStripThing(TIFF *tif, TIFFDirEntry *dir, uint32_t nstrips, + return (0); + } + ++ /* Before allocating a huge amount of memory for corrupted files, check ++ * if size of requested memory is not greater than file size. */ ++ uint64_t filesize = TIFFGetFileSize(tif); ++ uint64_t allocsize = (uint64_t)nstrips * sizeof(uint64_t); ++ if (allocsize > filesize) ++ { ++ TIFFWarningExtR(tif, module, ++ "Requested memory size for StripArray of %" PRIu64 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated", ++ allocsize, filesize); ++ _TIFFfreeExt(tif, data); ++ return (0); ++ } + resizeddata = (uint64_t *)_TIFFCheckMalloc( + tif, nstrips, sizeof(uint64_t), "for strip array"); + if (resizeddata == 0) +@@ -7263,6 +7336,23 @@ static void allocChoppedUpStripArrays(TIFF *tif, uint32_t nstrips, + } + bytecount = last_offset + last_bytecount - offset; + ++ /* Before allocating a huge amount of memory for corrupted files, check if ++ * size of StripByteCount and StripOffset tags is not greater than ++ * file size. ++ */ ++ uint64_t allocsize = (uint64_t)nstrips * sizeof(uint64_t) * 2; ++ uint64_t filesize = TIFFGetFileSize(tif); ++ if (allocsize > filesize) ++ { ++ TIFFWarningExtR(tif, "allocChoppedUpStripArrays", ++ "Requested memory size for StripByteCount and " ++ "StripOffsets %" PRIu64 ++ " is greather than filesize %" PRIu64 ++ ". Memory not allocated", ++ allocsize, filesize); ++ return; ++ } ++ + newcounts = + (uint64_t *)_TIFFCheckMalloc(tif, nstrips, sizeof(uint64_t), + "for chopped \"StripByteCounts\" array"); +-- +2.43.0 + |