swftools
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matthiaskramm
heap-buffer-overflow exists in the function swf_GetBits in rfxswf.c
system info
Ubuntu x86_64, clang 6.0, swfdump (latest master a9d5082)
Command line
./src/swfdump -D @@
AddressSanitizer output
==28613==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60300000efdf at pc 0x00000047238d bp 0x7fffffffdbe0 sp 0x7fffffffdbd0 READ of size 1 at 0x60300000efdf thread T0 #0 0x47238c in swf_GetBits /test/swftools-asan/lib/rfxswf.c:213 #1 0x4346cc in swf_GetSimpleShape modules/swfshape.c:66 #2 0x443fbc in swf_FontExtract_DefineFont modules/swftext.c:163 #3 0x44a096 in swf_FontExtract modules/swftext.c:597 #4 0x40c2dc in fontcallback2 /test/swftools-asan/src/swfdump.c:941 #5 0x4433c6 in swf_FontEnumerate modules/swftext.c:133 #6 0x409208 in main /test/swftools-asan/src/swfdump.c:1296 #7 0x7ffff68a683f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2083f) #8 0x40c168 in _start (/test/swftools-asan/src/swfdump+0x40c168)
0x60300000efdf is located 1 bytes to the left of 22-byte region [0x60300000efe0,0x60300000eff6) allocated by thread T0 here: #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602) #1 0x532fa7 in rfx_alloc /test/swftools-asan/lib/mem.c:30 #2 0x541396 (/test/swftools-asan/src/swfdump+0x541396)
SUMMARY: AddressSanitizer: heap-buffer-overflow /test/swftools-asan/lib/rfxswf.c:213 swf_GetBits Shadow bytes around the buggy address: 0x0c067fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa =>0x0c067fff9df0: fa fa fa fa fa fa fd fd fd fd fa[fa]00 00 06 fa 0x0c067fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c067fff9e40: 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 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 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe ==28613==ABORTING
