An issue was discovered in GPAC version 0.8.0 and 0.9.0-development-20191109. There are memory leaks in metx_New in isomedia/box_code_base.c and abst_Read in isomedia/box_code_adobe.c.
System info:  
Ubuntu 16.04.6 LTS, X64, gcc 5.4.0, gpac (latest master 00dfc93)  
Compile Command:
```
$ CC="gcc -fsanitize=address -g" CXX="g++ -fsanitize=address -g" ./configure --static-mp4box
$ make
```
Run Command:
```
$ MP4Box -diso -out /dev/null $POC-new-memory-leak
```
POC file:  
https://github.com/Clingto/POC/blob/master/gpac-MP4Box/gpac-00dfc93-crashes/POC-new-memory-leak

gdb info:
```C
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[iso file] Box "metx" size 15 (start 89) invalid (read 25)
[iso file] Box "abst" size 24 (start 0) invalid (read 104)
[iso file] Incomplete box abst - start 0 size 24
[iso file] Incomplete file while reading for dump - aborting parsing
[iso file] Box "metx" size 15 (start 89) invalid (read 25)
[iso file] Box "abst" size 24 (start 0) invalid (read 104)
Truncated file - missing 24 bytes
[Inferior 1 (process 6276) exited with code 01]
```
ASAN info:
```C
==26041==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 224 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0xaefada in metx_New isomedia/box_code_base.c:8367

Direct leak of 8 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x792106 in abst_Read isomedia/box_code_adobe.c:95
    #2 0xb62c63  (/bin/MP4Box+0xb62c63)

Indirect leak of 32 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x46c27d in gf_list_new utils/list.c:602

Indirect leak of 16 byte(s) in 4 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x7ffff63eb489 in __strdup (/lib/x86_64-linux-gnu/libc.so.6+0x8b489)
```


SUMMARY: AddressSanitizer: 280 byte(s) leaked in 10 allocation(s).

---

Addition: This bug was found with our fuzzer, which is based on AFL. Our fuzzer is developed by Yuanpingyu(cfenicey@gmail.com) 、Yanhao and Marsman1996(lqliuyuwei@outlook.com)
AddressSanitizer: 2 memory leaks of metx_New(), abst_Read()
This is a GitHub Issue
repo:gpac
owner:gpac
Title : AddressSanitizer: 2 memory leaks of metx_New(), abst_Read()
Issue date:

--- start body ---
System info:  
Ubuntu 16.04.6 LTS, X64, gcc 5.4.0, gpac (latest master 00dfc93)  
Compile Command:
```
$ CC="gcc -fsanitize=address -g" CXX="g++ -fsanitize=address -g" ./configure --static-mp4box
$ make
```
Run Command:
```
$ MP4Box -diso -out /dev/null $POC-new-memory-leak
```
POC file:  
https://github.com/Clingto/POC/blob/master/gpac-MP4Box/gpac-00dfc93-crashes/POC-new-memory-leak

gdb info:
```C
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[iso file] Box "metx" size 15 (start 89) invalid (read 25)
[iso file] Box "abst" size 24 (start 0) invalid (read 104)
[iso file] Incomplete box abst - start 0 size 24
[iso file] Incomplete file while reading for dump - aborting parsing
[iso file] Box "metx" size 15 (start 89) invalid (read 25)
[iso file] Box "abst" size 24 (start 0) invalid (read 104)
Truncated file - missing 24 bytes
[Inferior 1 (process 6276) exited with code 01]
```
ASAN info:
```C
==26041==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 224 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0xaefada in metx_New isomedia/box_code_base.c:8367

Direct leak of 8 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x792106 in abst_Read isomedia/box_code_adobe.c:95
    #2 0xb62c63  (/bin/MP4Box+0xb62c63)

Indirect leak of 32 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x46c27d in gf_list_new utils/list.c:602

Indirect leak of 16 byte(s) in 4 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x7ffff63eb489 in __strdup (/lib/x86_64-linux-gnu/libc.so.6+0x8b489)
```


SUMMARY: AddressSanitizer: 280 byte(s) leaked in 10 allocation(s).

---

Addition: This bug was found with our fuzzer, which is based on AFL. Our fuzzer is developed by Yuanpingyu(cfenicey@gmail.com) 、Yanhao and Marsman1996(lqliuyuwei@outlook.com)
--- end body ---

Memory leaks detected in the GPAC library during the processing of specific MP4 files. The leaks occur in the functions metx_New() and abst_Read(), which can lead to increased memory usage and potential performance degradation over time. This issue was identified using AddressSanitizer, indicating that the memory allocated is not being properly freed after use.