diff --git a/libtiff-CVE-2017-18013.patch b/libtiff-CVE-2017-18013.patch new file mode 100644 index 0000000..77afc48 --- /dev/null +++ b/libtiff-CVE-2017-18013.patch @@ -0,0 +1,36 @@ +From b1997b9c3ac0d6bac5effd7558141986487217a9 Mon Sep 17 00:00:00 2001 +From: Even Rouault +Date: Sun, 31 Dec 2017 15:09:41 +0100 +Subject: [PATCH 2/4] libtiff/tif_print.c: TIFFPrintDirectory(): fix null + pointer dereference on corrupted file. Fixes + http://bugzilla.maptools.org/show_bug.cgi?id=2770 / CVE-2017-18013 + +--- + 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 10a588e..b9b53a0 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 + } + } +-- +2.17.0 + diff --git a/libtiff-CVE-2017-9935.patch b/libtiff-CVE-2017-9935.patch new file mode 100644 index 0000000..39327ff --- /dev/null +++ b/libtiff-CVE-2017-9935.patch @@ -0,0 +1,164 @@ +From e1cd2d7ab032e7fe80b4c13e07895194c8bac85e Mon Sep 17 00:00:00 2001 +From: Brian May +Date: Thu, 7 Dec 2017 07:46:47 +1100 +Subject: [PATCH 1/4] [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. +--- + libtiff/tif_dir.c | 3 +++ + tools/tiff2pdf.c | 69 +++++++++++++++++++++++++++++++---------------- + 2 files changed, 49 insertions(+), 23 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 bdb9126..bd23c9e 100644 +--- a/tools/tiff2pdf.c ++++ b/tools/tiff2pdf.c +@@ -239,7 +239,7 @@ typedef struct { + float tiff_whitechromaticities[2]; + float tiff_primarychromaticities[6]; + float tiff_referenceblackwhite[2]; +- float* tiff_transferfunction[3]; ++ uint16* tiff_transferfunction[3]; + int pdf_image_interpolate; /* 0 (default) : do not interpolate, + 1 : interpolate */ + uint16 tiff_transferfunctioncount; +@@ -1049,6 +1049,8 @@ void t2p_read_tiff_init(T2P* t2p, TIFF* input){ + uint16 pagen=0; + uint16 paged=0; + uint16 xuint16=0; ++ uint16 tiff_transferfunctioncount=0; ++ uint16* tiff_transferfunction[3]; + + directorycount=TIFFNumberOfDirectories(input); + if(directorycount > TIFF_DIR_MAX) { +@@ -1157,26 +1159,48 @@ 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] != (uint16*) NULL) && ++ (tiff_transferfunction[2] != (uint16*) 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, +@@ -1837,10 +1861,9 @@ void t2p_read_tiff_data(T2P* t2p, TIFF* input){ + &(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])) { ++ if((t2p->tiff_transferfunction[1] != (uint16*) NULL) && ++ (t2p->tiff_transferfunction[2] != (uint16*) NULL) ++ ) { + t2p->tiff_transferfunctioncount=3; + } else { + t2p->tiff_transferfunctioncount=1; +-- +2.17.0 + diff --git a/libtiff-CVE-2018-10963.patch b/libtiff-CVE-2018-10963.patch new file mode 100644 index 0000000..039b7c1 --- /dev/null +++ b/libtiff-CVE-2018-10963.patch @@ -0,0 +1,31 @@ +From 98ed6179dec22db48f6e235d8ca9e2708bf4e71a Mon Sep 17 00:00:00 2001 +From: Even Rouault +Date: Sat, 12 May 2018 14:24:15 +0200 +Subject: [PATCH 4/4] TIFFWriteDirectorySec: avoid assertion. Fixes + http://bugzilla.maptools.org/show_bug.cgi?id=2795. CVE-2018-10963 + +--- + libtiff/tif_dirwrite.c | 7 +++++-- + 1 file changed, 5 insertions(+), 2 deletions(-) + +diff --git a/libtiff/tif_dirwrite.c b/libtiff/tif_dirwrite.c +index c68d6d2..5d0a669 100644 +--- a/libtiff/tif_dirwrite.c ++++ b/libtiff/tif_dirwrite.c +@@ -697,8 +697,11 @@ TIFFWriteDirectorySec(TIFF* tif, int isimage, int imagedone, uint64* pdiroff) + } + break; + default: +- assert(0); /* we should never get here */ +- break; ++ TIFFErrorExt(tif->tif_clientdata,module, ++ "Cannot write tag %d (%s)", ++ TIFFFieldTag(o), ++ o->field_name ? o->field_name : "unknown"); ++ goto bad; + } + } + } +-- +2.17.0 + diff --git a/libtiff-CVE-2018-8905.patch b/libtiff-CVE-2018-8905.patch new file mode 100644 index 0000000..be6bee4 --- /dev/null +++ b/libtiff-CVE-2018-8905.patch @@ -0,0 +1,53 @@ +From 1c127eb3cb7653bd61b61f9c3cfeb36fd10edab1 Mon Sep 17 00:00:00 2001 +From: Even Rouault +Date: Sat, 12 May 2018 15:32:31 +0200 +Subject: [PATCH 3/4] LZWDecodeCompat(): fix potential index-out-of-bounds + write. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2780 / + CVE-2018-8905 + +The fix consists in using the similar code LZWDecode() to validate we +don't write outside of the output buffer. +--- + libtiff/tif_lzw.c | 18 ++++++++++++------ + 1 file changed, 12 insertions(+), 6 deletions(-) + +diff --git a/libtiff/tif_lzw.c b/libtiff/tif_lzw.c +index bc8f9c8..186ea3c 100644 +--- a/libtiff/tif_lzw.c ++++ b/libtiff/tif_lzw.c +@@ -604,6 +604,7 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s) + char *tp; + unsigned char *bp; + int code, nbits; ++ int len; + long nextbits, nextdata, nbitsmask; + code_t *codep, *free_entp, *maxcodep, *oldcodep; + +@@ -755,13 +756,18 @@ LZWDecodeCompat(TIFF* tif, uint8* op0, tmsize_t occ0, uint16 s) + } while (--occ); + break; + } +- assert(occ >= codep->length); +- op += codep->length; +- occ -= codep->length; +- tp = op; ++ len = codep->length; ++ tp = op + len; + do { +- *--tp = codep->value; +- } while( (codep = codep->next) != NULL ); ++ int t; ++ --tp; ++ t = codep->value; ++ codep = codep->next; ++ *tp = (char)t; ++ } while (codep && tp > op); ++ assert(occ >= len); ++ op += len; ++ occ -= len; + } else { + *op++ = (char)code; + occ--; +-- +2.17.0 + diff --git a/libtiff.spec b/libtiff.spec index c52acb0..73d9229 100644 --- a/libtiff.spec +++ b/libtiff.spec @@ -1,7 +1,7 @@ Summary: Library of functions for manipulating TIFF format image files Name: libtiff Version: 4.0.9 -Release: 8%{?dist} +Release: 9%{?dist} License: libtiff Group: System Environment/Libraries URL: http://www.simplesystems.org/libtiff/ @@ -12,6 +12,10 @@ Patch0: libtiff-am-version.patch Patch1: libtiff-make-check.patch Patch2: libtiff-CVE-2018-5784.patch Patch3: libtiff-CVE-2018-7456.patch +Patch4: libtiff-CVE-2017-9935.patch +Patch5: libtiff-CVE-2017-18013.patch +Patch6: libtiff-CVE-2018-8905.patch +Patch7: libtiff-CVE-2018-10963.patch BuildRequires: gcc, gcc-c++ BuildRequires: zlib-devel libjpeg-devel jbigkit-devel @@ -67,6 +71,10 @@ image files using the libtiff library. %patch1 -p1 %patch2 -p1 %patch3 -p1 +%patch4 -p1 +%patch5 -p1 +%patch6 -p1 +%patch7 -p1 # Use build system's libtool.m4, not the one in the package. rm -f libtool.m4 @@ -170,6 +178,10 @@ find html -name 'Makefile*' | xargs rm %{_mandir}/man1/* %changelog +* Wed May 30 2018 Nikola Forró - 4.0.9-9 +- Fix CVE-2017-9935, CVE-2017-18013 (#1530441), + CVE-2018-8905 (#1559705) and CVE-2018-10963 (#1579061) + * Tue Apr 17 2018 Nikola Forró - 4.0.9-8 - Fix CVE-2018-7456 (#1556709)