Headline
CVE-2022-40008: heap-buffer-overflow exists in the function readU8 in lib/ttf.c · Issue #188 · matthiaskramm/swftools
SWFTools commit 772e55a was discovered to contain a heap-buffer overflow via the function readU8 at /lib/ttf.c.
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==26368==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x603000000086 at pc 0x0000004edfd2 bp 0x7ffe607a9f10 sp 0x7ffe607a9f08
READ of size 1 at 0x603000000086 thread T0
#0 0x4edfd1 in readU8 /project/models/swftools/lib/ttf.c:83:12
#1 0x4edfd1 in os2_parse /project/models/swftools/lib/ttf.c:467:30
#2 0x4edfd1 in ttf_parse_tables /project/models/swftools/lib/ttf.c:1849:13
#3 0x4edfd1 in ttf_load /project/models/swftools/lib/ttf.c:2180:9
#4 0x51054c in ttf_open /project/models/swftools/lib/ttf.c:2435:17
#5 0x4c51da in main /project/models/swftools/src/ttftool.c:91:19
#6 0x7f84d73a1082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082)
#7 0x41c43d in _start (/project/models/swftools/src/ttftool+0x41c43d)
0x603000000086 is located 0 bytes to the right of 22-byte region [0x603000000070,0x603000000086)
allocated by thread T0 here:
#0 0x494b7d in malloc (/project/models/swftools/src/ttftool+0x494b7d)
#1 0x4e083a in ttf_load /project/models/swftools/lib/ttf.c:2160:15
#2 0x51054c in ttf_open /project/models/swftools/lib/ttf.c:2435:17
#3 0x7f84d73a1082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082)
SUMMARY: AddressSanitizer: heap-buffer-overflow /project/models/swftools/lib/ttf.c:83:12 in readU8
Shadow bytes around the buggy address:
0x0c067fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff8000: fa fa 00 00 00 04 fa fa 00 00 00 06 fa fa 00 00
=>0x0c067fff8010:[06]fa fa fa 00 00 06 fa fa fa fd fd fd fd fa fa
0x0c067fff8020: 00 00 02 fa fa fa 00 00 00 02 fa fa fa fa fa fa
0x0c067fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8060: 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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==26368==ABORTING