In GPAC 0.7.1 and earlier, gf_text_get_utf8_line in media_tools/text_import.c in libgpac_static.a allows an out-of-bounds write because a certain -1 return value is mishandled.
https://usn.ubuntu.com/3926-1/
https://lists.debian.org/debian-lts-announce/2019/02/msg00040.html
https://github.com/gpac/gpac/issues/1177
https://github.com/gpac/gpac/commit/4c1360818fc8948e9307059fba4dc47ba8ad255d