bugThe FreeType Project - Bugs: bug #43679, FreeType 2.5.3 TrueType parsing...

 
 

bug #43679: FreeType 2.5.3 TrueType parsing heap-based out-of-bounds read in "tt_face_load_hdmx"

Submitted by:  Mateusz Jurczyk <j00ru>
Submitted on:  Mon 24 Nov 2014 08:21:02 AM UTC  
 
Severity: 3 - NormalItem Group: Crash
Status: FixedPrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: 2.5.4

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Mon 24 Nov 2014 09:24:15 AM UTC, comment #1:

Fixed in git, thanks!

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Mon 24 Nov 2014 08:21:02 AM UTC, original submission:

The following heap-based out-of-bounds memory read has been encountered in FreeType while fuzzing TrueType fonts. It has been reproduced with the current version of freetype2 from master git branch, with a 64-bit build of the ftbench utility compiled with AddressSanitizer:

$ ftbench <file>

Attached are three POC files which trigger the condition.

=================================================================
==12266==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000ecf8 at pc 0x5c42ea bp 0x7fffa2fe67d0 sp 0x7fffa2fe67c8
READ of size 1 at 0x60200000ecf8 thread T0
#0 0x5c42e9 in tt_face_load_hdmx freetype2/src/truetype/ttpload.c:540
#1 0x55f2b4 in tt_face_init freetype2/src/truetype/ttobjs.c:570
#2 0x4cc13e in open_face freetype2/src/base/ftobjs.c:1191
#3 0x4c794b in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#4 0x4c5b58 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#5 0x491533 in get_face ft2demos-2.5.3/src/ftbench.c:705
#6 0x48d748 in main ft2demos-2.5.3/src/ftbench.c:924

0x60200000ecf8 is located 0 bytes to the right of 8-byte region [0x60200000ecf0,0x60200000ecf8)
allocated by thread T0 here:
#0 0x472081 in __interceptor_malloc (ft2demos-2.5.3/bin/ftbench+0x472081)
#1 0xaf3a2f in ft_alloc freetype2/src/base/ftsystem.c:74
#2 0x526b21 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
#3 0x525591 in FT_Stream_EnterFrame freetype2/src/base/ftstream.c:267
#4 0x524d51 in FT_Stream_ExtractFrame freetype2/src/base/ftstream.c:200
#5 0x5c3448 in tt_face_load_hdmx freetype2/src/truetype/ttpload.c:500
#6 0x55f2b4 in tt_face_init freetype2/src/truetype/ttobjs.c:570
#7 0x4cc13e in open_face freetype2/src/base/ftobjs.c:1191
#8 0x4c794b in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#9 0x4c5b58 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#10 0x491533 in get_face ft2demos-2.5.3/src/ftbench.c:705
#11 0x48d748 in main ft2demos-2.5.3/src/ftbench.c:924

SUMMARY: AddressSanitizer: heap-buffer-overflow freetype2/src/truetype/ttpload.c:540 tt_face_load_hdmx
Shadow bytes around the buggy address:
0x0c047fff9d40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9d50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9d60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9d70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9d80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c047fff9d90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa 00[fa]
0x0c047fff9da0: fa fa 00 fa fa fa 00 06 fa fa 00 01 fa fa 00 00
0x0c047fff9db0: fa fa fd fa fa fa fd fa fa fa fd fd fa fa fd fd
0x0c047fff9dc0: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff9dd0: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff9de0: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Contiguous container OOB:fc
ASan internal: fe
==12266==ABORTING

Mateusz Jurczyk <j00ru>
Project Member

 

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  • -unavailable- added by wl (Posted a comment)
  • -unavailable- added by j00ru (Submitted the item)
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    Follow 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Mon 24 Nov 2014 09:24:15 AM UTCwlStatusNone=>Fixed
      PrivacyPrivate=>Public
      Assigned toNone=>wl
      Open/ClosedOpen=>Closed
      Planned ReleaseNone=>2.5.4
    Mon 24 Nov 2014 08:21:02 AM UTCj00ruAttached File-=>Added asan_heap-oob_5c42ea_1115_cov_3509873962_2821502151863019799.bin, #32533

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