In libopenmpt before 0.3.19 and 0.4.x before 0.4.9, ModPlug_InstrumentName and ModPlug_SampleName in libopenmpt_modplug.c do not restrict the lengths of libmodplug output-buffer strings in the C API, leading to a buffer overflow.
https://www.debian.org/security/2020/dsa-4729
https://source.openmpt.org/browse/openmpt/trunk/OpenMPT/?op=revision&rev=12127&peg=12127
https://lists.debian.org/debian-lts-announce/2020/08/msg00003.html
https://github.com/OpenMPT/openmpt/compare/libopenmpt-0.4.8...libopenmpt-0.4.9
https://github.com/OpenMPT/openmpt/compare/libopenmpt-0.3.18...libopenmpt-0.3.19
https://github.com/OpenMPT/openmpt/commit/927688ddab43c2b203569de79407a899e734fabe
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00044.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00035.html