bugThe FreeType Project - Bugs: bug #41696, Out-of-bounds reads in...

 
 

bug #41696: Out-of-bounds reads in tt_cmap{0,2,4}_validate

Submitted by:  Mateusz Jurczyk <j00ru>
Submitted on:  Tue 25 Feb 2014 08:31:27 PM UTC  
 
Severity: 3 - NormalItem Group: Crash
Status: FixedPrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: 2.5.3

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Wed 26 Feb 2014 06:51:06 PM UTC, comment #1:

Fixed in git. Thanks for the report!

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Tue 25 Feb 2014 08:31:27 PM UTC, original submission:

Tested on Ubuntu AMD64 with upstream FreeType2 and FreeType2-demos using ./ftbench <file>:

=================================================================
==30177==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61200000be42 at pc 0x7fe796 bp 0x7fff2e47b190 sp 0x7fff2e47b188
READ of size 1 at 0x61200000be42 thread T0
#0 0x7fe795 in tt_cmap0_validate freetype2/src/sfnt/ttcmap.c:92
#1 0x87bf1e in tt_face_build_cmaps freetype2/src/sfnt/ttcmap.c:3503
#2 0x83f2cd in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1295
#3 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#4 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#5 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#6 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#7 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#8 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

0x61200000be42 is located 0 bytes to the right of 258-byte region [0x61200000bd40,0x61200000be42)
allocated by thread T0 here:
#0 0x474821 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:74
#1 0xa6611f in ft_alloc freetype2/src/base/ftsystem.c:74
#2 0x519409 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
#3 0x518121 in FT_Stream_EnterFrame freetype2/src/base/ftstream.c:267
#4 0x517a05 in FT_Stream_ExtractFrame freetype2/src/base/ftstream.c:200
#5 0x844e6e in tt_face_load_cmap freetype2/src/sfnt/ttload.c:922
#6 0x83b126 in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1046
#7 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#8 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#9 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#10 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#11 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#12 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

SUMMARY: AddressSanitizer: heap-buffer-overflow freetype2/src/sfnt/ttcmap.c:92 tt_cmap0_validate
Shadow bytes around the buggy address:
0x0c247fff9770: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9780: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9790: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff97a0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff97b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c247fff97c0: 00 00 00 00 00 00 00 00[02]fa fa fa fa fa fa fa
0x0c247fff97d0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff97e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c247fff97f0: 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa
0x0c247fff9800: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9810: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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[==30177==ABORTING

=================================================================
==30858==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61700000ff18 at pc 0x80233d bp 0x7fff69711cb0 sp 0x7fff69711ca8
READ of size 1 at 0x61700000ff18 thread T0
#0 0x80233c in tt_cmap2_validate freetype2/src/sfnt/ttcmap.c:283
#1 0x87bf1e in tt_face_build_cmaps freetype2/src/sfnt/ttcmap.c:3503
#2 0x83f2cd in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1295
#3 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#4 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#5 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#6 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#7 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#8 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

0x61700000ff18 is located 0 bytes to the right of 664-byte region [0x61700000fc80,0x61700000ff18)
allocated by thread T0 here:
#0 0x474821 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:74
#1 0xa6611f in ft_alloc freetype2/src/base/ftsystem.c:74
#2 0x519409 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
#3 0x518121 in FT_Stream_EnterFrame freetype2/src/base/ftstream.c:267
#4 0x517a05 in FT_Stream_ExtractFrame freetype2/src/base/ftstream.c:200
#5 0x844e6e in tt_face_load_cmap freetype2/src/sfnt/ttload.c:922
#6 0x83b126 in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1046
#7 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#8 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#9 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#10 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#11 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#12 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

SUMMARY: AddressSanitizer: heap-buffer-overflow freetype2/src/sfnt/ttcmap.c:283 tt_cmap2_validate
Shadow bytes around the buggy address:
0x0c2e7fff9f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c2e7fff9fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c2e7fff9fe0: 00 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fff9ff0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa000: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c2e7fffa030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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 ==30858==ABORTING

=================================================================
==30879==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61200000bcf7 at pc 0x805f33 bp 0x7fff2189b470 sp 0x7fff2189b468
READ of size 1 at 0x61200000bcf7 thread T0
#0 0x805f32 in tt_cmap4_validate freetype2/src/sfnt/ttcmap.c:822
#1 0x87bf1e in tt_face_build_cmaps freetype2/src/sfnt/ttcmap.c:3503
#2 0x83f2cd in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1295
#3 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#4 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#5 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#6 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#7 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#8 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

0x61200000bcf7 is located 0 bytes to the right of 311-byte region [0x61200000bbc0,0x61200000bcf7)
allocated by thread T0 here:
#0 0x474821 in __interceptor_malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:74
#1 0xa6611f in ft_alloc freetype2/src/base/ftsystem.c:74
#2 0x519409 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
#3 0x518121 in FT_Stream_EnterFrame freetype2/src/base/ftstream.c:267
#4 0x517a05 in FT_Stream_ExtractFrame freetype2/src/base/ftstream.c:200
#5 0x844e6e in tt_face_load_cmap freetype2/src/sfnt/ttload.c:922
#6 0x83b126 in sfnt_load_face freetype2/src/sfnt/sfobjs.c:1046
#7 0x54cdf5 in tt_face_init freetype2/src/truetype/ttobjs.c:563
#8 0x4c95ce in open_face freetype2/src/base/ftobjs.c:1191
#9 0x4c57cd in FT_Open_Face freetype2/src/base/ftobjs.c:2123
#10 0x4c3ca4 in FT_New_Face freetype2/src/base/ftobjs.c:1254
#11 0x491d0f in get_face freetype2-demos/src/ftbench.c:705
#12 0x48e6c4 in main freetype2-demos/src/ftbench.c:924

SUMMARY: AddressSanitizer: heap-buffer-overflow freetype2/src/sfnt/ttcmap.c:822 tt_cmap4_validate
Shadow bytes around the buggy address:
0x0c247fff9740: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9750: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9760: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c247fff9770: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c247fff9790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[07]fa
0x0c247fff97a0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff97b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c247fff97c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c247fff97d0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x0c247fff97e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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: =30879==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 8 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 26 Feb 2014 06:51:06 PM UTCwlStatusNone=>Fixed
      PrivacyPrivate=>Public
      Assigned toNone=>wl
      Open/ClosedOpen=>Closed
      Planned ReleaseNone=>2.5.3
    Tue 25 Feb 2014 08:31:27 PM UTCj00ruAttached File-=>Added asan_heap-oob_849972_9059_cov_3792063058_quantfh.ttf, #30698
      Attached File-=>Added asan_heap-oob_8458ac_8915_cov_1416639713_obstacll.ttf, #30699
      Attached File-=>Added asan_heap-oob_841be0_3827_cov_2177390255_clR5x8.otb, #30700

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