Memory leak in the senc_Parse 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_drm.c at gpac 0.8.0.

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

Poc
[004-memleak-senc1349](https://github.com/gutiniao/afltest/blob/master/004-memleak-senc1349)

The ASAN information is as follows:

```
./MP4Box -diso 004-memleak-senc1349 -out /dev/null 
[iso file] Box "avcC" (start 939) has 34 extra bytes
[iso file] Unknown box type 0000 in parent sinf
[iso file] Unknown box type 75876C20 in parent dref
[iso file] Unknown box type 0000 in parent schi
[iso file] Unknown box type stts in parent stsd
[iso file] Unknown box type stsc in parent stsd
[iso file] Unknown box type stsz in parent stsd
[iso file] Unknown box type stco in parent stsd
[iso file] Unknown box type sgpd in parent stsd
[iso file] Unknown box type udta in parent stsd
[iso file] Box "stsd" (start 1439) has 8825 extra bytes
[iso file] Box "stsd" is larger than container box
[iso file] Box "stbl" size 291 (start 1431) invalid (read 9139)
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[iso file] senc box without tenc, assuming MS smooth+piff
[isobmf] Failed to parse SENC box, invalid SAI size
[isobmf] could not get cenc info for sample 1: Invalid IsoMedia File
Error opening file 004-memleak-senc1349: Invalid IsoMedia File

=================================================================
==2371==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7f0fc2519b50 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
    #1 0x564665fcabe9 in senc_Parse isomedia/box_code_drm.c:1349

SUMMARY: AddressSanitizer: 32 byte(s) leaked in 1 allocation(s).
```
about code:

```
#endif
        count = gf_bs_read_u32(bs);
        if (!senc->samp_aux_info) senc->samp_aux_info = gf_list_new();
        for (i=0; i<count; i++) {
                u32 is_encrypted;
---------->GF_CENCSampleAuxInfo *sai = (GF_CENCSampleAuxInfo *)gf_malloc(sizeof(GF_CENCSampleAuxInfo));
                memset(sai, 0, sizeof(GF_CENCSampleAuxInfo));
```
There are memory leaks in the senc_Parse function of box_code_drm.c:1349
This is a GitHub Issue
repo:gpac
owner:gpac
Title : There are memory leaks in the senc_Parse function of box_code_drm.c:1349
Issue date:

--- start body ---
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_drm.c at gpac 0.8.0.

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

Poc
[004-memleak-senc1349](https://github.com/gutiniao/afltest/blob/master/004-memleak-senc1349)

The ASAN information is as follows:

```
./MP4Box -diso 004-memleak-senc1349 -out /dev/null 
[iso file] Box "avcC" (start 939) has 34 extra bytes
[iso file] Unknown box type 0000 in parent sinf
[iso file] Unknown box type 75876C20 in parent dref
[iso file] Unknown box type 0000 in parent schi
[iso file] Unknown box type stts in parent stsd
[iso file] Unknown box type stsc in parent stsd
[iso file] Unknown box type stsz in parent stsd
[iso file] Unknown box type stco in parent stsd
[iso file] Unknown box type sgpd in parent stsd
[iso file] Unknown box type udta in parent stsd
[iso file] Box "stsd" (start 1439) has 8825 extra bytes
[iso file] Box "stsd" is larger than container box
[iso file] Box "stbl" size 291 (start 1431) invalid (read 9139)
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[ISO file] dataReferenceIndex set to 0 in sample entry, overriding to 1
[iso file] senc box without tenc, assuming MS smooth+piff
[isobmf] Failed to parse SENC box, invalid SAI size
[isobmf] could not get cenc info for sample 1: Invalid IsoMedia File
Error opening file 004-memleak-senc1349: Invalid IsoMedia File

=================================================================
==2371==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7f0fc2519b50 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)
    #1 0x564665fcabe9 in senc_Parse isomedia/box_code_drm.c:1349

SUMMARY: AddressSanitizer: 32 byte(s) leaked in 1 allocation(s).
```
about code:

```
#endif
        count = gf_bs_read_u32(bs);
        if (!senc->samp_aux_info) senc->samp_aux_info = gf_list_new();
        for (i=0; i<count; i++) {
                u32 is_encrypted;
---------->GF_CENCSampleAuxInfo *sai = (GF_CENCSampleAuxInfo *)gf_malloc(sizeof(GF_CENCSampleAuxInfo));
                memset(sai, 0, sizeof(GF_CENCSampleAuxInfo));
```
--- end body ---
