GPAC MP4box 2.1-DEV-rev617-g85ce76efd is vulnerable to Buffer Overflow in gf_hevc_read_sps_bs_internal function of media_tools/av_parsers.c:8273
Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [X] I looked for a similar issue and couldn't find any.
- [X] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [X] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

# Description

buffer overflow in gf_hevc_read_sps_bs_internal function of media_tools/av_parsers.c:8273

# Version info

```
MP4Box - GPAC version 2.1-DEV-rev617-g85ce76efd-master
(c) 2000-2022 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

compile and run

```
./configure --enable-sanitizer
make
./MP4Box import -cat poc_bof9.mp4
```

Crash reported by sanitizer

```
[HEVC] Error parsing NAL unit type 33
[HEVC] Error parsing Sequence Param Set
[HEVC] Error parsing NAL unit type 33
[HEVC] Error parsing Sequence Param Set
media_tools/av_parsers.c:8273:32: runtime error: index 159 out of bounds for type 'HEVC_RepFormat [16]'
```

# POC

[poc_bof9.zip](https://github.com/gpac/gpac/files/10247605/poc_bof9.zip)

# Impact

Potentially causing DoS and RCE

# Credit 

Xdchase



buffer overflow in gf_hevc_read_sps_bs_internal function of media_tools/av_parsers.c:8273
This is a GitHub Issue
repo:gpac
owner:gpac
Title : buffer overflow in gf_hevc_read_sps_bs_internal function of media_tools/av_parsers.c:8273
Issue date:

--- start body ---
Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

- [X] I looked for a similar issue and couldn't find any.
- [X] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
- [X] I give enough information for contributors to reproduce my issue (meaningful title, github labels, platform and compiler, command-line ...). I can share files anonymously with this dropbox: https://www.mediafire.com/filedrop/filedrop_hosted.php?drop=eec9e058a9486fe4e99c33021481d9e1826ca9dbc242a6cfaab0fe95da5e5d95

Detailed guidelines: http://gpac.io/2013/07/16/how-to-file-a-bug-properly/

# Description

buffer overflow in gf_hevc_read_sps_bs_internal function of media_tools/av_parsers.c:8273

# Version info

```
MP4Box - GPAC version 2.1-DEV-rev617-g85ce76efd-master
(c) 2000-2022 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

compile and run

```
./configure --enable-sanitizer
make
./MP4Box import -cat poc_bof9.mp4
```

Crash reported by sanitizer

```
[HEVC] Error parsing NAL unit type 33
[HEVC] Error parsing Sequence Param Set
[HEVC] Error parsing NAL unit type 33
[HEVC] Error parsing Sequence Param Set
media_tools/av_parsers.c:8273:32: runtime error: index 159 out of bounds for type 'HEVC_RepFormat [16]'
```

# POC

[poc_bof9.zip](https://github.com/gpac/gpac/files/10247605/poc_bof9.zip)

# Impact

Potentially causing DoS and RCE

# Credit 

Xdchase



--- end body ---

A buffer overflow vulnerability in the gf_hevc_read_sps_bs_internal function of GPAC's media_tools/av_parsers.c can lead to potential Denial of Service (DoS) and Remote Code Execution (RCE) when processing specially crafted HEVC video files. The issue arises from an out-of-bounds access to the HEVC_RepFormat array, which can be exploited by attackers to execute arbitrary code or crash the application.