Werner Lemberg pushed to branch master at FreeType / FreeType
Commits:
-
e1f364e5
by Werner Lemberg at 2021-02-25T20:00:07+01:00
2 changed files:
Changes:
1 |
+2021-02-25 Werner Lemberg <wl@gnu.org>
|
|
2 |
+ |
|
3 |
+ [woff2] Fix memory leak.
|
|
4 |
+ |
|
5 |
+ Reported as
|
|
6 |
+ |
|
7 |
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28148
|
|
8 |
+ |
|
9 |
+ * src/sfnt/sfwoff2.c (woff2_open_font): Reject fonts that have
|
|
10 |
+ multiple tables with the same tag. While not explicitly forbidden
|
|
11 |
+ in the OpenType specification, it is implicitly forbidden by
|
|
12 |
+ describing a binary search algorithm for tables that only works
|
|
13 |
+ reliably if table tags are unique.
|
|
14 |
+ |
|
1 | 15 |
2021-02-22 Werner Lemberg <wl@gnu.org>
|
2 | 16 |
|
3 | 17 |
* CMakeLists.txt: Update location of `LICENSE.TXT`.
|
... | ... | @@ -2208,6 +2208,25 @@ |
2208 | 2208 |
sizeof ( WOFF2_Table ),
|
2209 | 2209 |
compare_tags );
|
2210 | 2210 |
|
2211 |
+ /* reject fonts that have multiple tables with the same tag */
|
|
2212 |
+ for ( nn = 1; nn < woff2.num_tables; nn++ )
|
|
2213 |
+ {
|
|
2214 |
+ FT_ULong tag = indices[nn]->Tag;
|
|
2215 |
+ |
|
2216 |
+ |
|
2217 |
+ if ( tag == indices[nn - 1]->Tag )
|
|
2218 |
+ {
|
|
2219 |
+ FT_ERROR(( "woff2_open_font:"
|
|
2220 |
+ " multiple tables with tag `%c%c%c%c'.\n",
|
|
2221 |
+ (FT_Char)( tag >> 24 ),
|
|
2222 |
+ (FT_Char)( tag >> 16 ),
|
|
2223 |
+ (FT_Char)( tag >> 8 ),
|
|
2224 |
+ (FT_Char)( tag ) ));
|
|
2225 |
+ error = FT_THROW( Invalid_Table );
|
|
2226 |
+ goto Exit;
|
|
2227 |
+ }
|
|
2228 |
+ }
|
|
2229 |
+ |
|
2211 | 2230 |
if ( woff2.uncompressed_size < 1 )
|
2212 | 2231 |
{
|
2213 | 2232 |
error = FT_THROW( Invalid_Table );
|