The gf_isom_cenc_get_default_info_internal function in GPAC 1.0.1 allows attackers to cause a denial of service (NULL pointer dereference) via a crafted file in the MP4Box command.
https://github.com/gpac/gpac/issues/1735
https://github.com/gpac/gpac/commit/3b84ffcbacf144ce35650df958432f472b6483f8