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[pcf] Protect against invalid number of TOC entries (#46159). 

* src/pcf/pcfread.c (pcf_read_TOC): Check number of TOC entries
against size of data stream.
This commit is contained in:
Werner Lemberg 2015-10-08 23:17:41 +02:00
parent 06c2d3324e
commit d98053c997
2 changed files with 18 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2015-10-08 Werner Lemberg <wl@gnu.org>
[pcf] Protect against invalid number of TOC entries (#46159).
* src/pcf/pcfread.c (pcf_read_TOC): Check number of TOC entries
against size of data stream.
2015-10-08 Werner Lemberg <wl@gnu.org>
[type42] Protect against invalid number of glyphs (#46159).

14
src/pcf/pcfread.c
View File

@ -102,11 +102,19 @@ THE SOFTWARE.
FT_STREAM_READ_FIELDS( pcf_toc_header, toc ) )
return FT_THROW( Cannot_Open_Resource );
if ( toc->version != PCF_FILE_VERSION ||
toc->count > FT_ARRAY_MAX( face->toc.tables ) ||
toc->count == 0 )
if ( toc->version != PCF_FILE_VERSION ||
toc->count == 0 )
return FT_THROW( Invalid_File_Format );
/* we need 16 bytes per TOC entry */
if ( toc->count > stream->size >> 4 )
{
FT_TRACE0(( "pcf_read_TOC: adjusting number of tables"
" (from %d to %d)\n",
toc->count, stream->size >> 4 ));
toc->count = stream->size >> 4;
}
if ( FT_NEW_ARRAY( face->toc.tables, toc->count ) )
return FT_THROW( Out_Of_Memory );