In GNU Libextractor 1.4, there is a NULL Pointer Dereference in the EXTRACTOR_nsf_extract_method function of plugins/nsf_extractor.c.
https://lists.debian.org/debian-lts-announce/2017/12/msg00000.html
https://ftp.gnu.org/gnu/libextractor/libextractor-1.6.tar.gz
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-7052
https://bugzilla.redhat.com/show_bug.cgi?id=1501695
http://lists.gnu.org/archive/html/bug-libextractor/2017-10/msg00004.html