```
Description

NULL Pointer Dereference in MP4Box.
Version

$ ./bin/gcc/MP4Box -version
MP4Box - GPAC version 2.3-DEV-revrelease
(c) 2000-2023 Telecom Paris distributed under LGPL v2.1+ - http://gpac.io

Please cite our work in your research:
    GPAC Filters: https://doi.org/10.1145/3339825.3394929
    GPAC: https://doi.org/10.1145/1291233.1291452

GPAC Configuration: --enable-sanitizer
Features: GPAC_CONFIG_LINUX GPAC_64_BITS GPAC_HAS_IPV6 GPAC_HAS_SSL GPAC_HAS_SOCK_UN GPAC_MINIMAL_ODF GPAC_HAS_QJS GPAC_HAS_LINUX_DVB  GPAC_DISABLE_3D

Reproduce

complie and run

./configure --enable-sanitizer
make

Proof of Concept

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000004

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000007

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000014

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000069

[crash000004](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000004) is here

[crash000007](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000007) is here

[crash000014](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000014) is here

[crash000069](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000069) is here
Crash000069 Info

information reported by sanitizer

$ ./bin/gcc/MP4Box -dash 1000 ./crash000069
AddressSanitizer:DEADLYSIGNAL
=================================================================
==540488==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f07d6f78e85 bp 0x7ffc9161b230 sp 0x7ffc9161a970 T0)
==540488==The signal is caused by a READ memory access.
==540488==Hint: address points to the zero page.
    #0 0x7f07d6f78e84 in __GI__IO_fread /build/glibc-SzIz7B/glibc-2.31/libio/iofread.c:35
    #1 0x7f07dce74435 in __interceptor_fread ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:988
    #2 0x7f07d9e40e80 in file_read_bytes media_tools/mpeg2_ps.c:163
    #3 0x7f07d9e40e80 in read_to_next_pes_header media_tools/mpeg2_ps.c:544
    #4 0x7f07d9e41ca8 in search_for_next_pes_header media_tools/mpeg2_ps.c:681
    #5 0x7f07d9e421d5 in mpeg2ps_stream_read_next_pes_buffer media_tools/mpeg2_ps.c:732
    #6 0x7f07d9e42d48 in mpeg2ps_stream_find_mpeg_video_frame media_tools/mpeg2_ps.c:823
    #7 0x7f07d9e48e17 in mpeg2ps_stream_read_frame media_tools/mpeg2_ps.c:953
    #8 0x7f07d9e48e17 in get_info_for_all_streams media_tools/mpeg2_ps.c:1211
    #9 0x7f07d9e48e17 in mpeg2ps_scan_file media_tools/mpeg2_ps.c:1368
    #10 0x7f07d9e48e17 in mpeg2ps_init media_tools/mpeg2_ps.c:1625
    #11 0x7f07da47c50c in m2psdmx_process filters/dmx_mpegps.c:327
    #12 0x7f07da30933e in gf_filter_process_task filter_core/filter.c:2971
    #13 0x7f07da2c866a in gf_fs_thread_proc filter_core/filter_session.c:1962
    #14 0x7f07da2d5fd6 in gf_fs_run filter_core/filter_session.c:2261
    #15 0x7f07d9c6ba9d in gf_dasher_process media_tools/dash_segmenter.c:1236
    #16 0x562cd9a11bb6 in do_dash /home/functionmain/desktop/gpac-master-asan/applications/mp4box/mp4box.c:4825
    #17 0x562cd9a11bb6 in mp4box_main /home/functionmain/desktop/gpac-master-asan/applications/mp4box/mp4box.c:6239
    #18 0x7f07d6f1a082 in __libc_start_main ../csu/libc-start.c:308
    #19 0x562cd99e9f5d in _start (/home/functionmain/desktop/gpac-master-asan/bin/gcc/MP4Box+0xa5f5d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /build/glibc-SzIz7B/glibc-2.31/libio/iofread.c:35 in __GI__IO_fread
==540488==ABORTING

Crash000004 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000004
media_tools/avilib.c:559:2: runtime error: null pointer passed as argument 1, which is declared to never be null

Crash000007 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000007
[Dasher] No template assigned, using $File$_dash$FS$$Number$
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[RFC6381] Cannot find M4V config, using default mp4v.20
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[Dasher] PID crash000007 config changed during active period, forcing period switch
filters/dasher.c:8390:27: runtime error: member access within null pointer of type 'struct GF_DashStream'

Crash000014 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000014
[Dasher] No template assigned, using $File$_dash$FS$$Number$
Unknown CICP mapping for channel config 4/0.0
[RFC6381] Cannot find MPEG-H Audio Config or audio PL, defaulting to profile 0x01
[MP4Mux] No timescale specified, guessing from media: 0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 0/0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 1024/0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 2048/0
Unsupported cicp audio layout value 58
[Dasher] PID audio config changed during active period, forcing period switch
filters/dasher.c:8417:9: runtime error: member access within null pointer of type 'struct GF_DashStream'

Impact

This is capable of causing crashes.
References

[crash000004](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000004) is here

[crash000007](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000007) is here

[crash000014](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000014) is here

[crash000069](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000069) is here
Impact

This is capable of causing crashes.
Occurrences

dasher.c L8390

filters/dasher.c:8390:27: runtime error: member access within null pointer of type 'struct GF_DashStream'

mpeg2_ps.c L163

Address points to the zero page in file_read_bytes media_tools/mpeg2_ps.c:163

dasher.c L8417

filters/dasher.c:8417:9: runtime error: member access within null pointer of type 'struct GF_DashStream'

avilib.c L559

media_tools/avilib.c:559:2: runtime error: null pointer passed as argument 1, which is declared to never be null
References

    crash000004
    crash000069
    crash000014
    crash000007
```
NULL Pointer Dereference in media_tools/mpeg2_ps.c, media_tools/avilib.c and filters/dasher.c
This is a GitHub Issue
repo:gpac
owner:gpac
Title : NULL Pointer Dereference in media_tools/mpeg2_ps.c, media_tools/avilib.c and filters/dasher.c
Issue date:

--- start body ---
```
Description

NULL Pointer Dereference in MP4Box.
Version

$ ./bin/gcc/MP4Box -version
MP4Box - GPAC version 2.3-DEV-revrelease
(c) 2000-2023 Telecom Paris distributed under LGPL v2.1+ - http://gpac.io

Please cite our work in your research:
    GPAC Filters: https://doi.org/10.1145/3339825.3394929
    GPAC: https://doi.org/10.1145/1291233.1291452

GPAC Configuration: --enable-sanitizer
Features: GPAC_CONFIG_LINUX GPAC_64_BITS GPAC_HAS_IPV6 GPAC_HAS_SSL GPAC_HAS_SOCK_UN GPAC_MINIMAL_ODF GPAC_HAS_QJS GPAC_HAS_LINUX_DVB  GPAC_DISABLE_3D

Reproduce

complie and run

./configure --enable-sanitizer
make

Proof of Concept

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000004

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000007

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000014

./bin/gcc/MP4Box -dash 1000 ./crashes/crash000069

[crash000004](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000004) is here

[crash000007](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000007) is here

[crash000014](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000014) is here

[crash000069](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000069) is here
Crash000069 Info

information reported by sanitizer

$ ./bin/gcc/MP4Box -dash 1000 ./crash000069
AddressSanitizer:DEADLYSIGNAL
=================================================================
==540488==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f07d6f78e85 bp 0x7ffc9161b230 sp 0x7ffc9161a970 T0)
==540488==The signal is caused by a READ memory access.
==540488==Hint: address points to the zero page.
    #0 0x7f07d6f78e84 in __GI__IO_fread /build/glibc-SzIz7B/glibc-2.31/libio/iofread.c:35
    #1 0x7f07dce74435 in __interceptor_fread ../../../../src/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:988
    #2 0x7f07d9e40e80 in file_read_bytes media_tools/mpeg2_ps.c:163
    #3 0x7f07d9e40e80 in read_to_next_pes_header media_tools/mpeg2_ps.c:544
    #4 0x7f07d9e41ca8 in search_for_next_pes_header media_tools/mpeg2_ps.c:681
    #5 0x7f07d9e421d5 in mpeg2ps_stream_read_next_pes_buffer media_tools/mpeg2_ps.c:732
    #6 0x7f07d9e42d48 in mpeg2ps_stream_find_mpeg_video_frame media_tools/mpeg2_ps.c:823
    #7 0x7f07d9e48e17 in mpeg2ps_stream_read_frame media_tools/mpeg2_ps.c:953
    #8 0x7f07d9e48e17 in get_info_for_all_streams media_tools/mpeg2_ps.c:1211
    #9 0x7f07d9e48e17 in mpeg2ps_scan_file media_tools/mpeg2_ps.c:1368
    #10 0x7f07d9e48e17 in mpeg2ps_init media_tools/mpeg2_ps.c:1625
    #11 0x7f07da47c50c in m2psdmx_process filters/dmx_mpegps.c:327
    #12 0x7f07da30933e in gf_filter_process_task filter_core/filter.c:2971
    #13 0x7f07da2c866a in gf_fs_thread_proc filter_core/filter_session.c:1962
    #14 0x7f07da2d5fd6 in gf_fs_run filter_core/filter_session.c:2261
    #15 0x7f07d9c6ba9d in gf_dasher_process media_tools/dash_segmenter.c:1236
    #16 0x562cd9a11bb6 in do_dash /home/functionmain/desktop/gpac-master-asan/applications/mp4box/mp4box.c:4825
    #17 0x562cd9a11bb6 in mp4box_main /home/functionmain/desktop/gpac-master-asan/applications/mp4box/mp4box.c:6239
    #18 0x7f07d6f1a082 in __libc_start_main ../csu/libc-start.c:308
    #19 0x562cd99e9f5d in _start (/home/functionmain/desktop/gpac-master-asan/bin/gcc/MP4Box+0xa5f5d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /build/glibc-SzIz7B/glibc-2.31/libio/iofread.c:35 in __GI__IO_fread
==540488==ABORTING

Crash000004 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000004
media_tools/avilib.c:559:2: runtime error: null pointer passed as argument 1, which is declared to never be null

Crash000007 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000007
[Dasher] No template assigned, using $File$_dash$FS$$Number$
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[RFC6381] Cannot find M4V config, using default mp4v.20
[Dasher] No bitrate property assigned to PID crash000007, computing from bitstream
[Dasher] PID crash000007 config changed during active period, forcing period switch
filters/dasher.c:8390:27: runtime error: member access within null pointer of type 'struct GF_DashStream'

Crash000014 Info

information reported by sanitizer

./bin/gcc/MP4Box -dash 1000 ./crash000014
[Dasher] No template assigned, using $File$_dash$FS$$Number$
Unknown CICP mapping for channel config 4/0.0
[RFC6381] Cannot find MPEG-H Audio Config or audio PL, defaulting to profile 0x01
[MP4Mux] No timescale specified, guessing from media: 0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 0/0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 1024/0
[Dasher] Representation not initialized, dropping non-SAP1/2 packet CTS 2048/0
Unsupported cicp audio layout value 58
[Dasher] PID audio config changed during active period, forcing period switch
filters/dasher.c:8417:9: runtime error: member access within null pointer of type 'struct GF_DashStream'

Impact

This is capable of causing crashes.
References

[crash000004](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000004) is here

[crash000007](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000007) is here

[crash000014](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000014) is here

[crash000069](https://gitee.com/FUNctionMain/mypoc/raw/master/poc3/crash000069) is here
Impact

This is capable of causing crashes.
Occurrences

dasher.c L8390

filters/dasher.c:8390:27: runtime error: member access within null pointer of type 'struct GF_DashStream'

mpeg2_ps.c L163

Address points to the zero page in file_read_bytes media_tools/mpeg2_ps.c:163

dasher.c L8417

filters/dasher.c:8417:9: runtime error: member access within null pointer of type 'struct GF_DashStream'

avilib.c L559

media_tools/avilib.c:559:2: runtime error: null pointer passed as argument 1, which is declared to never be null
References

    crash000004
    crash000069
    crash000014
    crash000007
```
--- end body ---
