From 798b6b4b3ce370264d036e555185a99ce3aa97b7 Mon Sep 17 00:00:00 2001 From: Yi Zhao Date: Tue, 20 Mar 2018 07:53:20 +0800 Subject: tiff: Security fixes Fix CVE-2017-99935, CVE-2017-18013, CVE-2018-5784 References: https://nvd.nist.gov/vuln/detail/CVE-2017-9935 https://nvd.nist.gov/vuln/detail/CVE-2017-18013 https://nvd.nist.gov/vuln/detail/CVE-2018-5784 Patches from: CVE-2017-9935: https://gitlab.com/libtiff/libtiff/commit/3dd8f6a357981a4090f126ab9025056c938b6940 CVE-2017-18013: https://gitlab.com/libtiff/libtiff/commit/c6f41df7b581402dfba3c19a1e3df4454c551a01 CVE-2018-5784: https://gitlab.com/libtiff/libtiff/commit/473851d211cf8805a161820337ca74cc9615d6ef Signed-off-by: Yi Zhao Signed-off-by: Ross Burton --- .../libtiff/files/CVE-2017-18013.patch | 42 ++++++ .../libtiff/files/CVE-2017-9935.patch | 160 +++++++++++++++++++++ .../libtiff/files/CVE-2018-5784.patch | 135 +++++++++++++++++ meta/recipes-multimedia/libtiff/tiff_4.0.9.bb | 3 + 4 files changed, 340 insertions(+) create mode 100644 meta/recipes-multimedia/libtiff/files/CVE-2017-18013.patch create mode 100644 meta/recipes-multimedia/libtiff/files/CVE-2017-9935.patch create mode 100644 meta/recipes-multimedia/libtiff/files/CVE-2018-5784.patch (limited to 'meta/recipes-multimedia') diff --git a/meta/recipes-multimedia/libtiff/files/CVE-2017-18013.patch b/meta/recipes-multimedia/libtiff/files/CVE-2017-18013.patch new file mode 100644 index 0000000000..878e0de959 --- /dev/null +++ b/meta/recipes-multimedia/libtiff/files/CVE-2017-18013.patch @@ -0,0 +1,42 @@ +From 293c8b0298e91d20ba51291e2351ab7d110671d0 Mon Sep 17 00:00:00 2001 +From: Even Rouault +Date: Sun, 31 Dec 2017 15:09:41 +0100 +Subject: [PATCH] libtiff/tif_print.c: TIFFPrintDirectory(): fix null pointer + dereference on corrupted file. Fixes + http://bugzilla.maptools.org/show_bug.cgi?id=2770 + +Upstream-Status: Backport +[https://gitlab.com/libtiff/libtiff/commit/c6f41df7b581402dfba3c19a1e3df4454c551a01] + +CVE: CVE-2017-18013 + +Signed-off-by: Yi Zhao +--- + libtiff/tif_print.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/libtiff/tif_print.c b/libtiff/tif_print.c +index 24d4b98..f494cfb 100644 +--- a/libtiff/tif_print.c ++++ b/libtiff/tif_print.c +@@ -667,13 +667,13 @@ TIFFPrintDirectory(TIFF* tif, FILE* fd, long flags) + #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + fprintf(fd, " %3lu: [%8I64u, %8I64u]\n", + (unsigned long) s, +- (unsigned __int64) td->td_stripoffset[s], +- (unsigned __int64) td->td_stripbytecount[s]); ++ td->td_stripoffset ? (unsigned __int64) td->td_stripoffset[s] : 0, ++ td->td_stripbytecount ? (unsigned __int64) td->td_stripbytecount[s] : 0); + #else + fprintf(fd, " %3lu: [%8llu, %8llu]\n", + (unsigned long) s, +- (unsigned long long) td->td_stripoffset[s], +- (unsigned long long) td->td_stripbytecount[s]); ++ td->td_stripoffset ? (unsigned long long) td->td_stripoffset[s] : 0, ++ td->td_stripbytecount ? (unsigned long long) td->td_stripbytecount[s] : 0); + #endif + } + } +-- +2.7.4 + diff --git a/meta/recipes-multimedia/libtiff/files/CVE-2017-9935.patch b/meta/recipes-multimedia/libtiff/files/CVE-2017-9935.patch new file mode 100644 index 0000000000..60684dd2a6 --- /dev/null +++ b/meta/recipes-multimedia/libtiff/files/CVE-2017-9935.patch @@ -0,0 +1,160 @@ +From abb0055d21c52a9925314d5b0628fb2b6307619c Mon Sep 17 00:00:00 2001 +From: Brian May +Date: Thu, 7 Dec 2017 07:46:47 +1100 +Subject: [PATCH] tiff2pdf: Fix CVE-2017-9935 + +Fix for http://bugzilla.maptools.org/show_bug.cgi?id=2704 + +This vulnerability - at least for the supplied test case - is because we +assume that a tiff will only have one transfer function that is the same +for all pages. This is not required by the TIFF standards. + +We than read the transfer function for every page. Depending on the +transfer function, we allocate either 2 or 4 bytes to the XREF buffer. +We allocate this memory after we read in the transfer function for the +page. + +For the first exploit - POC1, this file has 3 pages. For the first page +we allocate 2 extra extra XREF entries. Then for the next page 2 more +entries. Then for the last page the transfer function changes and we +allocate 4 more entries. + +When we read the file into memory, we assume we have 4 bytes extra for +each and every page (as per the last transfer function we read). Which +is not correct, we only have 2 bytes extra for the first 2 pages. As a +result, we end up writing past the end of the buffer. + +There are also some related issues that this also fixes. For example, +TIFFGetField can return uninitalized pointer values, and the logic to +detect a N=3 vs N=1 transfer function seemed rather strange. + +It is also strange that we declare the transfer functions to be of type +float, when the standard says they are unsigned 16 bit values. This is +fixed in another patch. + +This patch will check to ensure that the N value for every transfer +function is the same for every page. If this changes, we abort with an +error. In theory, we should perhaps check that the transfer function +itself is identical for every page, however we don't do that due to the +confusion of the type of the data in the transfer function. + +Upstream-Status: Backport +[https://gitlab.com/libtiff/libtiff/commit/3dd8f6a357981a4090f126ab9025056c938b6940] + +CVE: CVE-2017-9935 + +Signed-off-by: Yi Zhao +--- + libtiff/tif_dir.c | 3 +++ + tools/tiff2pdf.c | 65 +++++++++++++++++++++++++++++++++++++------------------ + 2 files changed, 47 insertions(+), 21 deletions(-) + +diff --git a/libtiff/tif_dir.c b/libtiff/tif_dir.c +index f00f808..c36a5f3 100644 +--- a/libtiff/tif_dir.c ++++ b/libtiff/tif_dir.c +@@ -1067,6 +1067,9 @@ _TIFFVGetField(TIFF* tif, uint32 tag, va_list ap) + if (td->td_samplesperpixel - td->td_extrasamples > 1) { + *va_arg(ap, uint16**) = td->td_transferfunction[1]; + *va_arg(ap, uint16**) = td->td_transferfunction[2]; ++ } else { ++ *va_arg(ap, uint16**) = NULL; ++ *va_arg(ap, uint16**) = NULL; + } + break; + case TIFFTAG_REFERENCEBLACKWHITE: +diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c +index 454befb..0b5973e 100644 +--- a/tools/tiff2pdf.c ++++ b/tools/tiff2pdf.c +@@ -1047,6 +1047,8 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){ + uint16 pagen=0; + uint16 paged=0; + uint16 xuint16=0; ++ uint16 tiff_transferfunctioncount=0; ++ float* tiff_transferfunction[3]; + + directorycount=TIFFNumberOfDirectories(input); + t2p->tiff_pages = (T2P_PAGE*) _TIFFmalloc(TIFFSafeMultiply(tmsize_t,directorycount,sizeof(T2P_PAGE))); +@@ -1147,26 +1149,48 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){ + } + #endif + if (TIFFGetField(input, TIFFTAG_TRANSFERFUNCTION, +- &(t2p->tiff_transferfunction[0]), +- &(t2p->tiff_transferfunction[1]), +- &(t2p->tiff_transferfunction[2]))) { +- if((t2p->tiff_transferfunction[1] != (float*) NULL) && +- (t2p->tiff_transferfunction[2] != (float*) NULL) && +- (t2p->tiff_transferfunction[1] != +- t2p->tiff_transferfunction[0])) { +- t2p->tiff_transferfunctioncount = 3; +- t2p->tiff_pages[i].page_extra += 4; +- t2p->pdf_xrefcount += 4; +- } else { +- t2p->tiff_transferfunctioncount = 1; +- t2p->tiff_pages[i].page_extra += 2; +- t2p->pdf_xrefcount += 2; +- } +- if(t2p->pdf_minorversion < 2) +- t2p->pdf_minorversion = 2; ++ &(tiff_transferfunction[0]), ++ &(tiff_transferfunction[1]), ++ &(tiff_transferfunction[2]))) { ++ ++ if((tiff_transferfunction[1] != (float*) NULL) && ++ (tiff_transferfunction[2] != (float*) NULL) ++ ) { ++ tiff_transferfunctioncount=3; ++ } else { ++ tiff_transferfunctioncount=1; ++ } + } else { +- t2p->tiff_transferfunctioncount=0; ++ tiff_transferfunctioncount=0; + } ++ ++ if (i > 0){ ++ if (tiff_transferfunctioncount != t2p->tiff_transferfunctioncount){ ++ TIFFError( ++ TIFF2PDF_MODULE, ++ "Different transfer function on page %d", ++ i); ++ t2p->t2p_error = T2P_ERR_ERROR; ++ return; ++ } ++ } ++ ++ t2p->tiff_transferfunctioncount = tiff_transferfunctioncount; ++ t2p->tiff_transferfunction[0] = tiff_transferfunction[0]; ++ t2p->tiff_transferfunction[1] = tiff_transferfunction[1]; ++ t2p->tiff_transferfunction[2] = tiff_transferfunction[2]; ++ if(tiff_transferfunctioncount == 3){ ++ t2p->tiff_pages[i].page_extra += 4; ++ t2p->pdf_xrefcount += 4; ++ if(t2p->pdf_minorversion < 2) ++ t2p->pdf_minorversion = 2; ++ } else if (tiff_transferfunctioncount == 1){ ++ t2p->tiff_pages[i].page_extra += 2; ++ t2p->pdf_xrefcount += 2; ++ if(t2p->pdf_minorversion < 2) ++ t2p->pdf_minorversion = 2; ++ } ++ + if( TIFFGetField( + input, + TIFFTAG_ICCPROFILE, +@@ -1828,9 +1852,8 @@ void t2p_read_tiff_data(T2P* t2p, TIFF* input){ + &(t2p->tiff_transferfunction[1]), + &(t2p->tiff_transferfunction[2]))) { + if((t2p->tiff_transferfunction[1] != (float*) NULL) && +- (t2p->tiff_transferfunction[2] != (float*) NULL) && +- (t2p->tiff_transferfunction[1] != +- t2p->tiff_transferfunction[0])) { ++ (t2p->tiff_transferfunction[2] != (float*) NULL) ++ ) { + t2p->tiff_transferfunctioncount=3; + } else { + t2p->tiff_transferfunctioncount=1; +-- +2.7.4 + diff --git a/meta/recipes-multimedia/libtiff/files/CVE-2018-5784.patch b/meta/recipes-multimedia/libtiff/files/CVE-2018-5784.patch new file mode 100644 index 0000000000..406001d579 --- /dev/null +++ b/meta/recipes-multimedia/libtiff/files/CVE-2018-5784.patch @@ -0,0 +1,135 @@ +From 6cdea15213be6b67d9f8380c7bb40e325d3adace Mon Sep 17 00:00:00 2001 +From: Nathan Baker +Date: Tue, 6 Feb 2018 10:13:57 -0500 +Subject: [PATCH] Fix for bug 2772 + +It is possible to craft a TIFF document where the IFD list is circular, +leading to an infinite loop while traversing the chain. The libtiff +directory reader has a failsafe that will break out of this loop after +reading 65535 directory entries, but it will continue processing, +consuming time and resources to process what is essentially a bogus TIFF +document. + +This change fixes the above behavior by breaking out of processing when +a TIFF document has >= 65535 directories and terminating with an error. + +Upstream-Status: Backport +[https://gitlab.com/libtiff/libtiff/commit/473851d211cf8805a161820337ca74cc9615d6ef] + +CVE: CVE-2018-5784 + +Signed-off-by: Yi Zhao +--- + contrib/addtiffo/tif_overview.c | 14 +++++++++++++- + tools/tiff2pdf.c | 10 ++++++++++ + tools/tiffcrop.c | 13 +++++++++++-- + 3 files changed, 34 insertions(+), 3 deletions(-) + +diff --git a/contrib/addtiffo/tif_overview.c b/contrib/addtiffo/tif_overview.c +index c61ffbb..03b3573 100644 +--- a/contrib/addtiffo/tif_overview.c ++++ b/contrib/addtiffo/tif_overview.c +@@ -65,6 +65,8 @@ + # define MAX(a,b) ((a>b) ? a : b) + #endif + ++#define TIFF_DIR_MAX 65534 ++ + void TIFFBuildOverviews( TIFF *, int, int *, int, const char *, + int (*)(double,void*), void * ); + +@@ -91,6 +93,7 @@ uint32 TIFF_WriteOverview( TIFF *hTIFF, uint32 nXSize, uint32 nYSize, + { + toff_t nBaseDirOffset; + toff_t nOffset; ++ tdir_t iNumDir; + + (void) bUseSubIFDs; + +@@ -147,7 +150,16 @@ uint32 TIFF_WriteOverview( TIFF *hTIFF, uint32 nXSize, uint32 nYSize, + return 0; + + TIFFWriteDirectory( hTIFF ); +- TIFFSetDirectory( hTIFF, (tdir_t) (TIFFNumberOfDirectories(hTIFF)-1) ); ++ iNumDir = TIFFNumberOfDirectories(hTIFF); ++ if( iNumDir > TIFF_DIR_MAX ) ++ { ++ TIFFErrorExt( TIFFClientdata(hTIFF), ++ "TIFF_WriteOverview", ++ "File `%s' has too many directories.\n", ++ TIFFFileName(hTIFF) ); ++ exit(-1); ++ } ++ TIFFSetDirectory( hTIFF, (tdir_t) (iNumDir - 1) ); + + nOffset = TIFFCurrentDirOffset( hTIFF ); + +diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c +index 0b5973e..ef5d6a0 100644 +--- a/tools/tiff2pdf.c ++++ b/tools/tiff2pdf.c +@@ -68,6 +68,8 @@ extern int getopt(int, char**, char*); + + #define PS_UNIT_SIZE 72.0F + ++#define TIFF_DIR_MAX 65534 ++ + /* This type is of PDF color spaces. */ + typedef enum { + T2P_CS_BILEVEL = 0x01, /* Bilevel, black and white */ +@@ -1051,6 +1053,14 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){ + float* tiff_transferfunction[3]; + + directorycount=TIFFNumberOfDirectories(input); ++ if(directorycount > TIFF_DIR_MAX) { ++ TIFFError( ++ TIFF2PDF_MODULE, ++ "TIFF contains too many directories, %s", ++ TIFFFileName(input)); ++ t2p->t2p_error = T2P_ERR_ERROR; ++ return; ++ } + t2p->tiff_pages = (T2P_PAGE*) _TIFFmalloc(TIFFSafeMultiply(tmsize_t,directorycount,sizeof(T2P_PAGE))); + if(t2p->tiff_pages==NULL){ + TIFFError( +diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c +index c69177e..c60cb38 100644 +--- a/tools/tiffcrop.c ++++ b/tools/tiffcrop.c +@@ -217,6 +217,8 @@ extern int getopt(int argc, char * const argv[], const char *optstring); + #define DUMP_TEXT 1 + #define DUMP_RAW 2 + ++#define TIFF_DIR_MAX 65534 ++ + /* Offsets into buffer for margins and fixed width and length segments */ + struct offset { + uint32 tmargin; +@@ -2233,7 +2235,7 @@ main(int argc, char* argv[]) + pageNum = -1; + else + total_images = 0; +- /* read multiple input files and write to output file(s) */ ++ /* Read multiple input files and write to output file(s) */ + while (optind < argc - 1) + { + in = TIFFOpen (argv[optind], "r"); +@@ -2241,7 +2243,14 @@ main(int argc, char* argv[]) + return (-3); + + /* If only one input file is specified, we can use directory count */ +- total_images = TIFFNumberOfDirectories(in); ++ total_images = TIFFNumberOfDirectories(in); ++ if (total_images > TIFF_DIR_MAX) ++ { ++ TIFFError (TIFFFileName(in), "File contains too many directories"); ++ if (out != NULL) ++ (void) TIFFClose(out); ++ return (1); ++ } + if (image_count == 0) + { + dirnum = 0; +-- +2.7.4 + diff --git a/meta/recipes-multimedia/libtiff/tiff_4.0.9.bb b/meta/recipes-multimedia/libtiff/tiff_4.0.9.bb index b8f895b143..8c3bba5c64 100644 --- a/meta/recipes-multimedia/libtiff/tiff_4.0.9.bb +++ b/meta/recipes-multimedia/libtiff/tiff_4.0.9.bb @@ -6,6 +6,9 @@ CVE_PRODUCT = "libtiff" SRC_URI = "http://download.osgeo.org/libtiff/tiff-${PV}.tar.gz \ file://libtool2.patch \ + file://CVE-2017-9935.patch \ + file://CVE-2017-18013.patch \ + file://CVE-2018-5784.patch \ " SRC_URI[md5sum] = "54bad211279cc93eb4fca31ba9bfdc79" -- cgit 1.2.3-korg