diff options
Diffstat (limited to 'third_party/libtiff/tif_dirread.c')
| -rw-r--r-- | third_party/libtiff/tif_dirread.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c index 0e3f8ccd48..e0403aef31 100644 --- a/third_party/libtiff/tif_dirread.c +++ b/third_party/libtiff/tif_dirread.c @@ -3754,6 +3754,17 @@ TIFFReadDirectory(TIFF* tif) fip ? fip->field_name : "unknown tagname"); continue; } + /* ColorMap or TransferFunction for high bit */ + /* depths do not make much sense and could be */ + /* used as a denial of service vector */ + if (tif->tif_dir.td_bitspersample > 24) + { + TIFFWarningExt(tif->tif_clientdata,module, + "Ignoring %s because BitsPerSample=%d>24", + fip ? fip->field_name : "unknown tagname", + tif->tif_dir.td_bitspersample); + continue; + } countpersample=(1L<<tif->tif_dir.td_bitspersample); if ((dp->tdir_tag==TIFFTAG_TRANSFERFUNCTION)&&(dp->tdir_count==(uint64)countpersample)) { |