From: Pawan Badganchi <pawan.badgan...@kpit.com> Below patch fixes the CVE-2022-4645 as well.
0001-Revised-handling-of-TIFFTAG_INKNAMES-and-related-TIF.patch Link: https://nvd.nist.gov/vuln/detail/CVE-2022-4645 Signed-off-by: Pawan Badganchi <pawan.badgan...@kpit.com> --- ...-of-TIFFTAG_INKNAMES-and-related-TIF.patch | 267 ++++++++++++++++++ 1 file changed, 267 insertions(+) create mode 100644 meta/recipes-multimedia/libtiff/files/0001-Revised-handling-of-TIFFTAG_INKNAMES-and-related-TIF.patch diff --git a/meta/recipes-multimedia/libtiff/files/0001-Revised-handling-of-TIFFTAG_INKNAMES-and-related-TIF.patch b/meta/recipes-multimedia/libtiff/files/0001-Revised-handling-of-TIFFTAG_INKNAMES-and-related-TIF.patch new file mode 100644 index 0000000000..17b37be041 --- /dev/null +++ b/meta/recipes-multimedia/libtiff/files/0001-Revised-handling-of-TIFFTAG_INKNAMES-and-related-TIF.patch @@ -0,0 +1,267 @@ +From f00484b9519df933723deb38fff943dc291a793d Mon Sep 17 00:00:00 2001 +From: Su_Laus <su...@freenet.de> +Date: Tue, 30 Aug 2022 16:56:48 +0200 +Subject: [PATCH] Revised handling of TIFFTAG_INKNAMES and related + TIFFTAG_NUMBEROFINKS value + +In order to solve the buffer overflow issues related to TIFFTAG_INKNAMES and related TIFFTAG_NUMBEROFINKS value, a revised handling of those tags within LibTiff is proposed: + +Behaviour for writing: + `NumberOfInks` MUST fit to the number of inks in the `InkNames` string. + `NumberOfInks` is automatically set when `InkNames` is set. + If `NumberOfInks` is different to the number of inks within `InkNames` string, that will be corrected and a warning is issued. + If `NumberOfInks` is not equal to samplesperpixel only a warning will be issued. + +Behaviour for reading: + When reading `InkNames` from a TIFF file, the `NumberOfInks` will be set automatically to the number of inks in `InkNames` string. + If `NumberOfInks` is different to the number of inks within `InkNames` string, that will be corrected and a warning is issued. + If `NumberOfInks` is not equal to samplesperpixel only a warning will be issued. + +This allows the safe use of the NumberOfInks value to read out the InkNames without buffer overflow + +This MR will close the following issues: #149, #150, #152, #168 (to be checked), #250, #269, #398 and #456. + +It also fixes the old bug at http://bugzilla.maptools.org/show_bug.cgi?id=2599, for which the limitation of `NumberOfInks = SPP` was introduced, which is in my opinion not necessary and does not solve the general issue. + +CVE: CVE-2022-3599 CVE-2022-4645 +Upstream-Status: Backport [https://gitlab.com/libtiff/libtiff/-/commit/e813112545942107551433d61afd16ac094ff246.patch] +Signed-off-by: Ross Burton <ross.bur...@arm.com> +Signed-off-by: Pawan Badganchi <pawan.badgan...@kpit.com> +--- + libtiff/tif_dir.c | 119 ++++++++++++++++++++++++----------------- + libtiff/tif_dir.h | 2 + + libtiff/tif_dirinfo.c | 2 +- + libtiff/tif_dirwrite.c | 5 ++ + libtiff/tif_print.c | 4 ++ + 5 files changed, 82 insertions(+), 50 deletions(-) + +diff --git a/libtiff/tif_dir.c b/libtiff/tif_dir.c +index 793e8a79..816f7756 100644 +--- a/libtiff/tif_dir.c ++++ b/libtiff/tif_dir.c +@@ -136,32 +136,30 @@ setExtraSamples(TIFF* tif, va_list ap, uint32_t* v) + } + + /* +- * Confirm we have "samplesperpixel" ink names separated by \0. Returns ++ * Count ink names separated by \0. Returns + * zero if the ink names are not as expected. + */ +-static uint32_t +-checkInkNamesString(TIFF* tif, uint32_t slen, const char* s) ++static uint16_t ++countInkNamesString(TIFF *tif, uint32_t slen, const char *s) + { +- TIFFDirectory* td = &tif->tif_dir; +- uint16_t i = td->td_samplesperpixel; ++ uint16_t i = 0; ++ const char *ep = s + slen; ++ const char *cp = s; + + if (slen > 0) { +- const char* ep = s+slen; +- const char* cp = s; +- for (; i > 0; i--) { ++ do { + for (; cp < ep && *cp != '\0'; cp++) {} + if (cp >= ep) + goto bad; + cp++; /* skip \0 */ +- } +- return ((uint32_t)(cp - s)); ++ i++; ++ } while (cp < ep); ++ return (i); + } + bad: + TIFFErrorExt(tif->tif_clientdata, "TIFFSetField", +- "%s: Invalid InkNames value; expecting %"PRIu16" names, found %"PRIu16, +- tif->tif_name, +- td->td_samplesperpixel, +- (uint16_t)(td->td_samplesperpixel-i)); ++ "%s: Invalid InkNames value; no NUL at given buffer end location %"PRIu32", after %"PRIu16" ink", ++ tif->tif_name, slen, i); + return (0); + } + +@@ -478,13 +476,61 @@ _TIFFVSetField(TIFF* tif, uint32_t tag, va_list ap) + _TIFFsetFloatArray(&td->td_refblackwhite, va_arg(ap, float*), 6); + break; + case TIFFTAG_INKNAMES: +- v = (uint16_t) va_arg(ap, uint16_vap); +- s = va_arg(ap, char*); +- v = checkInkNamesString(tif, v, s); +- status = v > 0; +- if( v > 0 ) { +- _TIFFsetNString(&td->td_inknames, s, v); +- td->td_inknameslen = v; ++ { ++ v = (uint16_t) va_arg(ap, uint16_vap); ++ s = va_arg(ap, char*); ++ uint16_t ninksinstring; ++ ninksinstring = countInkNamesString(tif, v, s); ++ status = ninksinstring > 0; ++ if(ninksinstring > 0 ) { ++ _TIFFsetNString(&td->td_inknames, s, v); ++ td->td_inknameslen = v; ++ /* Set NumberOfInks to the value ninksinstring */ ++ if (TIFFFieldSet(tif, FIELD_NUMBEROFINKS)) ++ { ++ if (td->td_numberofinks != ninksinstring) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Warning %s; Tag %s:\n Value %"PRIu16" of NumberOfInks is different from the number of inks %"PRIu16".\n -> NumberOfInks value adapted to %"PRIu16"", ++ tif->tif_name, fip->field_name, td->td_numberofinks, ninksinstring, ninksinstring); ++ td->td_numberofinks = ninksinstring; ++ } ++ } else { ++ td->td_numberofinks = ninksinstring; ++ TIFFSetFieldBit(tif, FIELD_NUMBEROFINKS); ++ } ++ if (TIFFFieldSet(tif, FIELD_SAMPLESPERPIXEL)) ++ { ++ if (td->td_numberofinks != td->td_samplesperpixel) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Warning %s; Tag %s:\n Value %"PRIu16" of NumberOfInks is different from the SamplesPerPixel value %"PRIu16"", ++ tif->tif_name, fip->field_name, td->td_numberofinks, td->td_samplesperpixel); ++ } ++ } ++ } ++ } ++ break; ++ case TIFFTAG_NUMBEROFINKS: ++ v = (uint16_t)va_arg(ap, uint16_vap); ++ /* If InkNames already set also NumberOfInks is set accordingly and should be equal */ ++ if (TIFFFieldSet(tif, FIELD_INKNAMES)) ++ { ++ if (v != td->td_numberofinks) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Error %s; Tag %s:\n It is not possible to set the value %"PRIu32" for NumberOfInks\n which is different from the number of inks in the InkNames tag (%"PRIu16")", ++ tif->tif_name, fip->field_name, v, td->td_numberofinks); ++ /* Do not set / overwrite number of inks already set by InkNames case accordingly. */ ++ status = 0; ++ } ++ } else { ++ td->td_numberofinks = (uint16_t)v; ++ if (TIFFFieldSet(tif, FIELD_SAMPLESPERPIXEL)) ++ { ++ if (td->td_numberofinks != td->td_samplesperpixel) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Warning %s; Tag %s:\n Value %"PRIu32" of NumberOfInks is different from the SamplesPerPixel value %"PRIu16"", ++ tif->tif_name, fip->field_name, v, td->td_samplesperpixel); ++ } ++ } + } + break; + case TIFFTAG_PERSAMPLE: +@@ -986,34 +1032,6 @@ _TIFFVGetField(TIFF* tif, uint32_t tag, va_list ap) + if (fip->field_bit == FIELD_CUSTOM) { + standard_tag = 0; + } +- +- if( standard_tag == TIFFTAG_NUMBEROFINKS ) +- { +- int i; +- for (i = 0; i < td->td_customValueCount; i++) { +- uint16_t val; +- TIFFTagValue *tv = td->td_customValues + i; +- if (tv->info->field_tag != standard_tag) +- continue; +- if( tv->value == NULL ) +- return 0; +- val = *(uint16_t *)tv->value; +- /* Truncate to SamplesPerPixel, since the */ +- /* setting code for INKNAMES assume that there are SamplesPerPixel */ +- /* inknames. */ +- /* Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2599 */ +- if( val > td->td_samplesperpixel ) +- { +- TIFFWarningExt(tif->tif_clientdata,"_TIFFVGetField", +- "Truncating NumberOfInks from %u to %"PRIu16, +- val, td->td_samplesperpixel); +- val = td->td_samplesperpixel; +- } +- *va_arg(ap, uint16_t*) = val; +- return 1; +- } +- return 0; +- } + + switch (standard_tag) { + case TIFFTAG_SUBFILETYPE: +@@ -1195,6 +1213,9 @@ _TIFFVGetField(TIFF* tif, uint32_t tag, va_list ap) + case TIFFTAG_INKNAMES: + *va_arg(ap, const char**) = td->td_inknames; + break; ++ case TIFFTAG_NUMBEROFINKS: ++ *va_arg(ap, uint16_t *) = td->td_numberofinks; ++ break; + default: + { + int i; +diff --git a/libtiff/tif_dir.h b/libtiff/tif_dir.h +index 09065648..0c251c9e 100644 +--- a/libtiff/tif_dir.h ++++ b/libtiff/tif_dir.h +@@ -117,6 +117,7 @@ typedef struct { + /* CMYK parameters */ + int td_inknameslen; + char* td_inknames; ++ uint16_t td_numberofinks; /* number of inks in InkNames string */ + + int td_customValueCount; + TIFFTagValue *td_customValues; +@@ -174,6 +175,7 @@ typedef struct { + #define FIELD_TRANSFERFUNCTION 44 + #define FIELD_INKNAMES 46 + #define FIELD_SUBIFD 49 ++#define FIELD_NUMBEROFINKS 50 + /* FIELD_CUSTOM (see tiffio.h) 65 */ + /* end of support for well-known tags; codec-private tags follow */ + #define FIELD_CODEC 66 /* base of codec-private tags */ +diff --git a/libtiff/tif_dirinfo.c b/libtiff/tif_dirinfo.c +index 3371cb5c..3b4bcd33 100644 +--- a/libtiff/tif_dirinfo.c ++++ b/libtiff/tif_dirinfo.c +@@ -114,7 +114,7 @@ tiffFields[] = { + { TIFFTAG_SUBIFD, -1, -1, TIFF_IFD8, 0, TIFF_SETGET_C16_IFD8, TIFF_SETGET_UNDEFINED, FIELD_SUBIFD, 1, 1, "SubIFD", (TIFFFieldArray*) &tiffFieldArray }, + { TIFFTAG_INKSET, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "InkSet", NULL }, + { TIFFTAG_INKNAMES, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_C16_ASCII, TIFF_SETGET_UNDEFINED, FIELD_INKNAMES, 1, 1, "InkNames", NULL }, +- { TIFFTAG_NUMBEROFINKS, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "NumberOfInks", NULL }, ++ { TIFFTAG_NUMBEROFINKS, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, TIFF_SETGET_UNDEFINED, FIELD_NUMBEROFINKS, 1, 0, "NumberOfInks", NULL }, + { TIFFTAG_DOTRANGE, 2, 2, TIFF_SHORT, 0, TIFF_SETGET_UINT16_PAIR, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 0, 0, "DotRange", NULL }, + { TIFFTAG_TARGETPRINTER, -1, -1, TIFF_ASCII, 0, TIFF_SETGET_ASCII, TIFF_SETGET_UNDEFINED, FIELD_CUSTOM, 1, 0, "TargetPrinter", NULL }, + { TIFFTAG_EXTRASAMPLES, -1, -1, TIFF_SHORT, 0, TIFF_SETGET_C16_UINT16, TIFF_SETGET_UNDEFINED, FIELD_EXTRASAMPLES, 0, 1, "ExtraSamples", NULL }, +diff --git a/libtiff/tif_dirwrite.c b/libtiff/tif_dirwrite.c +index 6c86fdca..062e4610 100644 +--- a/libtiff/tif_dirwrite.c ++++ b/libtiff/tif_dirwrite.c +@@ -626,6 +626,11 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64_t* pdiroff) + if (!TIFFWriteDirectoryTagAscii(tif,&ndir,dir,TIFFTAG_INKNAMES,tif->tif_dir.td_inknameslen,tif->tif_dir.td_inknames)) + goto bad; + } ++ if (TIFFFieldSet(tif, FIELD_NUMBEROFINKS)) ++ { ++ if (!TIFFWriteDirectoryTagShort(tif, &ndir, dir, TIFFTAG_NUMBEROFINKS, tif->tif_dir.td_numberofinks)) ++ goto bad; ++ } + if (TIFFFieldSet(tif,FIELD_SUBIFD)) + { + if (!TIFFWriteDirectoryTagSubifd(tif,&ndir,dir)) +diff --git a/libtiff/tif_print.c b/libtiff/tif_print.c +index 16ce5780..a91b9e7b 100644 +--- a/libtiff/tif_print.c ++++ b/libtiff/tif_print.c +@@ -397,6 +397,10 @@ TIFFPrintDirectory(TIFF* tif, FILE* fd, long flags) + } + fputs("\n", fd); + } ++ if (TIFFFieldSet(tif, FIELD_NUMBEROFINKS)) { ++ fprintf(fd, " NumberOfInks: %d\n", ++ td->td_numberofinks); ++ } + if (TIFFFieldSet(tif,FIELD_THRESHHOLDING)) { + fprintf(fd, " Thresholding: "); + switch (td->td_threshholding) { +-- +2.34.1 + -- 2.38.1
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