Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

heap-buffer-overflow exists in the function swf_GetD64 in rfxswf.c #175

Open
cxlzff opened this issue Oct 7, 2021 · 0 comments
Open

heap-buffer-overflow exists in the function swf_GetD64 in rfxswf.c #175

cxlzff opened this issue Oct 7, 2021 · 0 comments

Comments

@cxlzff
Copy link

cxlzff commented Oct 7, 2021

system info

Ubuntu x86_64, clang 6.0, swfdump (latest master a9d5082)

Command line

./src/swfdump -D @@

AddressSanitizer output

==8687==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60b00000aff8 at pc 0x000000473b4e bp 0x7fffffffdc10 sp 0x7fffffffdc00
READ of size 8 at 0x60b00000aff8 thread T0
#0 0x473b4d in swf_GetD64 /test/swftools-asan/lib/rfxswf.c:520
#1 0x4a7851 in pool_read as3/pool.c:1119
#2 0x4935ec in swf_ReadABC as3/abc.c:748
#3 0x409045 in main /test/swftools-asan/src/swfdump.c:1577
#4 0x7ffff68a683f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2083f)
#5 0x40c168 in _start (/test/swftools-asan/src/swfdump+0x40c168)

0x60b00000affd is located 0 bytes to the right of 109-byte region [0x60b00000af90,0x60b00000affd)
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:520 swf_GetD64
Shadow bytes around the buggy address:
0x0c167fff95a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff95b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff95c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff95d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff95e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c167fff95f0: fa fa 00 00 00 00 00 00 00 00 00 00 00 00 00[05]
0x0c167fff9600: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff9610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff9620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff9630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c167fff9640: 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
==8687==ABORTING

POC
swf_GetD64_poc

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant