Memory leak in the sgpd_parse_entry function in MP4Box in gpac 0.8.0 allows attackers to cause a denial of service (DoS) via a crafted input.
Thanks for reporting your issue. Please make sure these boxes are checked before submitting your issue - thank you!

[ √] I looked for a similar issue and couldn't find any.
[ √] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
[ √] 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/

A crafted input will lead to crash in box_code_base.c at gpac 0.8.0.

Triggered by
./MP4Box -diso POC -out /dev/null

Poc
[007-memleak-sgpd_parse_entry](https://github.com/gutiniao/afltest/blob/master/007-memleak-sgpd_parse_entry)

The ASAN information is as follows:

```
./MP4Box -diso 007-memleak-sgpd_parse_entry -out /dev/null 
[iso file] Unknown box type gods in parent moov
[iso file] Box "avcC" (start 939) has 34 extra bytes
[iso file] Unknown box type 0000 in parent sinf
[iso file] Invalid descriptor tag 0xc1 in esds
[iso file] Read Box "esds" (start 1491) failed (Invalid IsoMedia File) - skipping
[iso file] Invalid descriptor tag 0xc1 in esds
[iso file] Read Box "esds" (start 0) failed (Invalid IsoMedia File) - skipping
[isom] not enough bytes in box sgpd: 20 left, reading 63 (file isomedia/box_code_base.c, line 9926)
[iso file] Read Box "sgpd" (start 1678) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "stbl" (start 1431) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "minf" (start 1371) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "mdia" (start 1298) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "trak" (start 1198) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "moov" (start 351) failed (Invalid IsoMedia File) - skipping
Error opening file 007-memleak-sgpd_parse_entry: Invalid IsoMedia File

=================================================================
==6751==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 37 byte(s) in 1 object(s) allocated from:
    #0 0x7f25e0370b50 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
    #1 0x55e8ff099553 in sgpd_parse_entry isomedia/box_code_base.c:9656
    #2 0x55e8ff099553 in sgpd_Read isomedia/box_code_base.c:9922

SUMMARY: AddressSanitizer: 37 byte(s) leaked in 1 allocation(s)
```

There are memory leaks in the sgpd_parse_entry function of box_code_base.c:9656
This is a GitHub Issue
repo:gpac
owner:gpac
Title : There are memory leaks in the sgpd_parse_entry function of box_code_base.c:9656
Issue date:

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

[ √] I looked for a similar issue and couldn't find any.
[ √] I tried with the latest version of GPAC. Installers available at http://gpac.io/downloads/gpac-nightly-builds/
[ √] 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/

A crafted input will lead to crash in box_code_base.c at gpac 0.8.0.

Triggered by
./MP4Box -diso POC -out /dev/null

Poc
[007-memleak-sgpd_parse_entry](https://github.com/gutiniao/afltest/blob/master/007-memleak-sgpd_parse_entry)

The ASAN information is as follows:

```
./MP4Box -diso 007-memleak-sgpd_parse_entry -out /dev/null 
[iso file] Unknown box type gods in parent moov
[iso file] Box "avcC" (start 939) has 34 extra bytes
[iso file] Unknown box type 0000 in parent sinf
[iso file] Invalid descriptor tag 0xc1 in esds
[iso file] Read Box "esds" (start 1491) failed (Invalid IsoMedia File) - skipping
[iso file] Invalid descriptor tag 0xc1 in esds
[iso file] Read Box "esds" (start 0) failed (Invalid IsoMedia File) - skipping
[isom] not enough bytes in box sgpd: 20 left, reading 63 (file isomedia/box_code_base.c, line 9926)
[iso file] Read Box "sgpd" (start 1678) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "stbl" (start 1431) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "minf" (start 1371) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "mdia" (start 1298) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "trak" (start 1198) failed (Invalid IsoMedia File) - skipping
[iso file] Read Box "moov" (start 351) failed (Invalid IsoMedia File) - skipping
Error opening file 007-memleak-sgpd_parse_entry: Invalid IsoMedia File

=================================================================
==6751==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 37 byte(s) in 1 object(s) allocated from:
    #0 0x7f25e0370b50 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
    #1 0x55e8ff099553 in sgpd_parse_entry isomedia/box_code_base.c:9656
    #2 0x55e8ff099553 in sgpd_Read isomedia/box_code_base.c:9922

SUMMARY: AddressSanitizer: 37 byte(s) leaked in 1 allocation(s)
```

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