#10699: heap-buffer-overflow at libavfilter/edge_template.c:116:5 in
ff_gaussian_blur_8 in FFmpeg
-------------------------------------+-------------------------------------
Reporter: | Type: defect
ZengYunxiang |
Status: new | Priority: important
Component: avfilter | Version: git-
| master
Keywords: bugs | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
Dear developers,
I found the following heap-buffer-overflow bug on FFmpeg6.1 when using
blurdetect filter, please confirm.
The poc file(poc5ffmpeg) will be attached to this ticket.
How to reproduce:
{{{
git clone https://github.com/FFmpeg/FFmpeg.git ffmpeg6-1
cd ffmpeg6-1
git checkout 466799d
./configure --cc=clang --cxx=clang++ --ld=clang --enable-debug --toolchain
=clang-asan
make -j30
./ffmpeg_g -y -i poc5ffmpeg -filter_complex blurdetect tmp.mp4
}}}
ASAN Log:
{{{
=================================================================
==1720809==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x61e0000022bb at pc 0x559c66da631a bp 0x7fff763641f0 sp 0x7fff763639c0
WRITE of size 873 at 0x61e0000022bb thread T0
#0 0x559c66da6319 in __asan_memcpy (/ffmpeg6-1/ffmpeg_g+0x924319)
(BuildId: 235e8d23658b9f137a6f44e3f2d1bddad7c9bf95)
#1 0x559c67729e03 in ff_gaussian_blur_8
/ffmpeg6-1/libavfilter/edge_template.c:116:5
#2 0x559c6700a960 in blurdetect_filter_frame
/ffmpeg6-1/libavfilter/vf_blurdetect.c:287:9
#3 0x559c66ef8142 in ff_filter_frame_framed
/ffmpeg6-1/libavfilter/avfilter.c:969:11
#4 0x559c66ef8142 in ff_filter_frame_to_filter
/ffmpeg6-1/libavfilter/avfilter.c:1123:11
#5 0x559c66ef8142 in ff_filter_activate_default
/ffmpeg6-1/libavfilter/avfilter.c:1172:20
#6 0x559c66ef8142 in ff_filter_activate
/ffmpeg6-1/libavfilter/avfilter.c:1331:11
#7 0x559c66f0a137 in push_frame
/ffmpeg6-1/libavfilter/buffersrc.c:167:15
#8 0x559c66f0a137 in av_buffersrc_add_frame_flags
/ffmpeg6-1/libavfilter/buffersrc.c:271:15
#9 0x559c66e0d431 in ifilter_send_frame
/ffmpeg6-1/fftools/ffmpeg_filter.c:2440:11
#10 0x559c66de2cbe in send_frame_to_filters
/ffmpeg6-1/fftools/ffmpeg_dec.c:153:15
#11 0x559c66de2cbe in dec_packet
/ffmpeg6-1/fftools/ffmpeg_dec.c:813:19
#12 0x559c66e53f7b in process_input_packet
/ffmpeg6-1/fftools/ffmpeg.c:811:15
#13 0x559c66e51373 in process_input
/ffmpeg6-1/fftools/ffmpeg.c:1115:11
#14 0x559c66e51373 in transcode_step
/ffmpeg6-1/fftools/ffmpeg.c:1142:11
#15 0x559c66e51373 in transcode /ffmpeg6-1/fftools/ffmpeg.c:1204:15
#16 0x559c66e51373 in main /ffmpeg6-1/fftools/ffmpeg.c:1330:11
#17 0x7f29f0e35d8f (/lib/x86_64-linux-gnu/libc.so.6+0x29d8f)
(BuildId: a43bfc8428df6623cd498c9c0caeb91aec9be4f9)
#18 0x7f29f0e35e3f in __libc_start_main (/lib/x86_64-linux-
gnu/libc.so.6+0x29e3f) (BuildId: a43bfc8428df6623cd498c9c0caeb91aec9be4f9)
#19 0x559c66d240f4 in _start (/ffmpeg6-1/ffmpeg_g+0x8a20f4) (BuildId:
235e8d23658b9f137a6f44e3f2d1bddad7c9bf95)
0x61e0000022bb is located 0 bytes to the right of 2619-byte region
[0x61e000001880,0x61e0000022bb)
allocated by thread T0 here:
#0 0x559c66da7ab7 in __interceptor_posix_memalign
(/ffmpeg6-1/ffmpeg_g+0x925ab7) (BuildId:
235e8d23658b9f137a6f44e3f2d1bddad7c9bf95)
#1 0x559c6a3dfa5e in av_malloc /ffmpeg6-1/libavutil/mem.c:105:9
#2 0x559c6700c565 in blurdetect_config_input
/ffmpeg6-1/libavfilter/vf_blurdetect.c:112:21
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/ffmpeg6-1/ffmpeg_g+0x924319) (BuildId:
235e8d23658b9f137a6f44e3f2d1bddad7c9bf95) in __asan_memcpy
Shadow bytes around the buggy address:
0x0c3c7fff8400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3c7fff8410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3c7fff8420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3c7fff8430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3c7fff8440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c3c7fff8450: 00 00 00 00 00 00 00[03]fa fa fa fa fa fa fa fa
0x0c3c7fff8460: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3c7fff8470: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3c7fff8480: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3c7fff8490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3c7fff84a0: 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
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
==1720809==ABORTING
}}}
ffmpeg version:
{{{
# ./ffmpeg -version
ffmpeg version n6.1-3-g466799d4f5 Copyright (c) 2000-2023 the FFmpeg
developers
built with clang version 9.0.0 (https://github.com/llvm-mirror/llvm
c62b24f070c9a4bb1a76409e623042a740cac4cd)
configuration: --cc=clang --cxx=clang++ --ld=clang --enable-debug
--toolchain=clang-asan
libavutil 58. 29.100 / 58. 29.100
libavcodec 60. 31.102 / 60. 31.102
libavformat 60. 16.100 / 60. 16.100
libavdevice 60. 3.100 / 60. 3.100
libavfilter 9. 12.100 / 9. 12.100
libswscale 7. 5.100 / 7. 5.100
libswresample 4. 12.100 / 4. 12.100
}}}
Credit:
{{{
Zeng Yunxiang
}}}
Thanks for your time!
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10699>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker_______________________________________________
FFmpeg-trac mailing list
FFmpeg-trac@avcodec.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-trac
To unsubscribe, visit link above, or email
ffmpeg-trac-requ...@ffmpeg.org with subject "unsubscribe".
