[FFmpeg-trac] #9121(ffmpeg:new): heap buffer overflow read when extracting frames from the video
FFmpeg
trac at avcodec.org
Wed Feb 24 12:25:50 EET 2021
#9121: heap buffer overflow read when extracting frames from the video
--------------------------------+--------------------------------------
Reporter: bird | Type: defect
Status: new | Priority: normal
Component: ffmpeg | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------+--------------------------------------
Summary of the bug:
There is a heap buffer overflow read when extracting frames from the
video.
How to reproduce:
{{{
$ ./ffmpeg_g -ss 0 -i ./2 -s 320x240 -y -f image2 output.jpeg
ffmpeg version N-101261-g78d5e1c653 Copyright (c) 2000-2021 the FFmpeg
developers
built with clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
configuration: --prefix=/home/bird/ffmpeg_build_new --pkg-config-
flags=--static --extra-cflags='-I/home/bird/ffmpeg_build_new/include -fno-
omit-frame-pointer -g -fsanitize=address' --extra-cxxflags='-fno-omit-
frame-pointer -g -fsanitize=address' --extra-
ldflags='-L/home/bird/ffmpeg_build_new/lib -fsanitize=address' --extra-
libs='-lpthread -lm' --bindir=/home/bird/bin_new --enable-gpl --enable-
gnutls --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-
libmp3lame --enable-libopus --enable-libvpx --enable-libx264 --enable-
libx265 --enable-nonfree --cc=clang --cxx=clang++ --enable-debug
libavutil 56. 66.100 / 56. 66.100
libavcodec 58.125.100 / 58.125.100
libavformat 58. 68.100 / 58. 68.100
libavdevice 58. 12.100 / 58. 12.100
libavfilter 7.107.100 / 7.107.100
libswscale 5. 8.100 / 5. 8.100
libswresample 3. 8.100 / 3. 8.100
libpostproc 55. 8.100 / 55. 8.100
Ignoring attempt to set invalid timebase 0/0 for st:0
[vividas @ 0x61b000000080] number of audio tracks 0 is not 1
[vividas @ 0x61b000000080] Could not find codec parameters for stream 0
(Video: vp6, yuv420p): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
=================================================================
==15154==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x602000005318 at pc 0x000001167ade bp 0x7ffffa677bd0 sp 0x7ffffa677bc8
READ of size 8 at 0x602000005318 thread T0
#0 0x1167add in viv_read_seek
/disk1/fuzzing/ffmpeg_latest/libavformat/vividas.c:769:89
#1 0x1142360 in seek_frame_internal
/disk1/fuzzing/ffmpeg_latest/libavformat/utils.c:2449:15
#2 0x1142360 in av_seek_frame
/disk1/fuzzing/ffmpeg_latest/libavformat/utils.c:2481
#3 0x11439ff in avformat_seek_file
/disk1/fuzzing/ffmpeg_latest/libavformat/utils.c:2533:19
#4 0x51dd2d in open_input_file
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:1252:15
#5 0x51c42a in open_files
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:3335:15
#6 0x51be55 in ffmpeg_parse_options
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:3375:11
#7 0x55ba9f in main
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg.c:4964:11
#8 0x7f59d7e58bf6 in __libc_start_main /build/glibc-
S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
#9 0x423609 in _start (/disk1/fuzzing/ffmpeg_latest/ffmpeg_g+0x423609)
0x602000005318 is located 0 bytes to the right of 8-byte region
[0x602000005310,0x602000005318)
allocated by thread T0 here:
#0 0x4e3940 in realloc
(/disk1/fuzzing/ffmpeg_latest/ffmpeg_g+0x4e3940)
#1 0x11553a0 in avformat_new_stream
/disk1/fuzzing/ffmpeg_latest/libavformat/utils.c:4492:15
#2 0x11656ce in track_header
/disk1/fuzzing/ffmpeg_latest/libavformat/vividas.c:322:24
#3 0x11656ce in viv_read_header
/disk1/fuzzing/ffmpeg_latest/libavformat/vividas.c:605
#4 0x1134fd4 in avformat_open_input
/disk1/fuzzing/ffmpeg_latest/libavformat/utils.c:599:20
#5 0x51d667 in open_input_file
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:1174:11
#6 0x51c42a in open_files
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:3335:15
#7 0x51be55 in ffmpeg_parse_options
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg_opt.c:3375:11
#8 0x55ba9f in main
/disk1/fuzzing/ffmpeg_latest/fftools/ffmpeg.c:4964:11
#9 0x7f59d7e58bf6 in __libc_start_main /build/glibc-
S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow
/disk1/fuzzing/ffmpeg_latest/libavformat/vividas.c:769:89 in viv_read_seek
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9121>
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