libmaxminddb before 1.4.3 has a heap-based buffer over-read in dump_entry_data_list in maxminddb.c.
https://security.gentoo.org/glsa/202011-15
https://lists.debian.org/debian-lts-announce/2020/11/msg00019.html
https://github.com/maxmind/libmaxminddb/pull/237
https://github.com/maxmind/libmaxminddb/issues/236
https://github.com/maxmind/libmaxminddb/compare/1.4.2...1.4.3