diff options
Diffstat (limited to 'main/tiff/CVE-2017-7602.patch')
| -rw-r--r-- | main/tiff/CVE-2017-7602.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/main/tiff/CVE-2017-7602.patch b/main/tiff/CVE-2017-7602.patch new file mode 100644 index 0000000000..c0bc41ff90 --- /dev/null +++ b/main/tiff/CVE-2017-7602.patch @@ -0,0 +1,50 @@ +From 66e7bd59520996740e4df5495a830b42fae48bc4 Mon Sep 17 00:00:00 2001 +From: erouault <erouault> +Date: Wed, 11 Jan 2017 16:33:34 +0000 +Subject: [PATCH] * libtiff/tif_read.c: avoid potential undefined behaviour on + signed integer addition in TIFFReadRawStrip1() in isMapped() case. Fixes + http://bugzilla.maptools.org/show_bug.cgi?id=2650 + +--- + libtiff/tif_read.c | 27 ++++++++++++++++++--------- + 2 files changed, 24 insertions(+), 9 deletions(-) + +diff --git a/libtiff/tif_read.c b/libtiff/tif_read.c +index 52bbf50..b7aacbd 100644 +--- a/libtiff/tif_read.c ++++ b/libtiff/tif_read.c +@@ -420,16 +420,25 @@ TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size, + return ((tmsize_t)(-1)); + } + } else { +- tmsize_t ma,mb; ++ tmsize_t ma; + tmsize_t n; +- ma=(tmsize_t)td->td_stripoffset[strip]; +- mb=ma+size; +- if ((td->td_stripoffset[strip] > (uint64)TIFF_TMSIZE_T_MAX)||(ma>tif->tif_size)) +- n=0; +- else if ((mb<ma)||(mb<size)||(mb>tif->tif_size)) +- n=tif->tif_size-ma; +- else +- n=size; ++ if ((td->td_stripoffset[strip] > (uint64)TIFF_TMSIZE_T_MAX)|| ++ ((ma=(tmsize_t)td->td_stripoffset[strip])>tif->tif_size)) ++ { ++ n=0; ++ } ++ else if( ma > TIFF_TMSIZE_T_MAX - size ) ++ { ++ n=0; ++ } ++ else ++ { ++ tmsize_t mb=ma+size; ++ if (mb>tif->tif_size) ++ n=tif->tif_size-ma; ++ else ++ n=size; ++ } + if (n!=size) { + #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, |