diff options
Diffstat (limited to 'third_party/libtiff/0003-CVE-2015-8781-8782-8783.patch')
| -rw-r--r-- | third_party/libtiff/0003-CVE-2015-8781-8782-8783.patch | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/third_party/libtiff/0003-CVE-2015-8781-8782-8783.patch b/third_party/libtiff/0003-CVE-2015-8781-8782-8783.patch new file mode 100644 index 0000000000..c4ed67dfc8 --- /dev/null +++ b/third_party/libtiff/0003-CVE-2015-8781-8782-8783.patch @@ -0,0 +1,172 @@ +From aaab5c3c9d2a2c6984f23ccbc79702610439bc65 Mon Sep 17 00:00:00 2001 +From: erouault <erouault> +Date: Sun, 27 Dec 2015 16:25:11 +0000 +Subject: [PATCH] * libtiff/tif_luv.c: fix potential out-of-bound writes in + decode functions in non debug builds by replacing assert()s by regular if + checks (bugzilla #2522). Fix potential out-of-bound reads in case of short + input data. + +--- + ChangeLog | 7 +++++++ + libtiff/tif_luv.c | 55 ++++++++++++++++++++++++++++++++++++++++++++----------- + 2 files changed, 51 insertions(+), 11 deletions(-) + +Index: tiff-4.0.3/libtiff/tif_luv.c +=================================================================== +--- tiff-4.0.3.orig/libtiff/tif_luv.c 2016-03-23 10:13:56.868540963 -0400 ++++ tiff-4.0.3/libtiff/tif_luv.c 2016-03-23 10:13:56.864540914 -0400 +@@ -202,7 +202,11 @@ + if (sp->user_datafmt == SGILOGDATAFMT_16BIT) + tp = (int16*) op; + else { +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + tp = (int16*) sp->tbuf; + } + _TIFFmemset((void*) tp, 0, npixels*sizeof (tp[0])); +@@ -211,9 +215,11 @@ + cc = tif->tif_rawcc; + /* get each byte string */ + for (shft = 2*8; (shft -= 8) >= 0; ) { +- for (i = 0; i < npixels && cc > 0; ) ++ for (i = 0; i < npixels && cc > 0; ) { + if (*bp >= 128) { /* run */ +- rc = *bp++ + (2-128); /* TODO: potential input buffer overrun when decoding corrupt or truncated data */ ++ if( cc < 2 ) ++ break; ++ rc = *bp++ + (2-128); + b = (int16)(*bp++ << shft); + cc -= 2; + while (rc-- && i < npixels) +@@ -223,6 +229,7 @@ + while (--cc && rc-- && i < npixels) + tp[i++] |= (int16)*bp++ << shft; + } ++ } + if (i != npixels) { + #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, +@@ -268,13 +275,17 @@ + if (sp->user_datafmt == SGILOGDATAFMT_RAW) + tp = (uint32 *)op; + else { +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + tp = (uint32 *) sp->tbuf; + } + /* copy to array of uint32 */ + bp = (unsigned char*) tif->tif_rawcp; + cc = tif->tif_rawcc; +- for (i = 0; i < npixels && cc > 0; i++) { ++ for (i = 0; i < npixels && cc >= 3; i++) { + tp[i] = bp[0] << 16 | bp[1] << 8 | bp[2]; + bp += 3; + cc -= 3; +@@ -325,7 +336,11 @@ + if (sp->user_datafmt == SGILOGDATAFMT_RAW) + tp = (uint32*) op; + else { +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + tp = (uint32*) sp->tbuf; + } + _TIFFmemset((void*) tp, 0, npixels*sizeof (tp[0])); +@@ -334,11 +349,13 @@ + cc = tif->tif_rawcc; + /* get each byte string */ + for (shft = 4*8; (shft -= 8) >= 0; ) { +- for (i = 0; i < npixels && cc > 0; ) ++ for (i = 0; i < npixels && cc > 0; ) { + if (*bp >= 128) { /* run */ ++ if( cc < 2 ) ++ break; + rc = *bp++ + (2-128); + b = (uint32)*bp++ << shft; +- cc -= 2; /* TODO: potential input buffer overrun when decoding corrupt or truncated data */ ++ cc -= 2; + while (rc-- && i < npixels) + tp[i++] |= b; + } else { /* non-run */ +@@ -346,6 +363,7 @@ + while (--cc && rc-- && i < npixels) + tp[i++] |= (uint32)*bp++ << shft; + } ++ } + if (i != npixels) { + #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, +@@ -407,6 +425,7 @@ + static int + LogL16Encode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) + { ++ static const char module[] = "LogL16Encode"; + LogLuvState* sp = EncoderState(tif); + int shft; + tmsize_t i; +@@ -427,7 +446,11 @@ + tp = (int16*) bp; + else { + tp = (int16*) sp->tbuf; +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + (*sp->tfunc)(sp, bp, npixels); + } + /* compress each byte string */ +@@ -500,6 +523,7 @@ + static int + LogLuvEncode24(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) + { ++ static const char module[] = "LogLuvEncode24"; + LogLuvState* sp = EncoderState(tif); + tmsize_t i; + tmsize_t npixels; +@@ -515,7 +539,11 @@ + tp = (uint32*) bp; + else { + tp = (uint32*) sp->tbuf; +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + (*sp->tfunc)(sp, bp, npixels); + } + /* write out encoded pixels */ +@@ -547,6 +575,7 @@ + static int + LogLuvEncode32(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) + { ++ static const char module[] = "LogLuvEncode32"; + LogLuvState* sp = EncoderState(tif); + int shft; + tmsize_t i; +@@ -568,7 +597,11 @@ + tp = (uint32*) bp; + else { + tp = (uint32*) sp->tbuf; +- assert(sp->tbuflen >= npixels); ++ if(sp->tbuflen < npixels) { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Translation buffer too short"); ++ return (0); ++ } + (*sp->tfunc)(sp, bp, npixels); + } + /* compress each byte string */ |