Memory leak in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (memory consumption) via a large number of ASN.1 object identifiers in X.509 certificates.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-5303
http://www.securityfocus.com/archive/1/archive/1/536692/100/0/threaded
http://packetstormsecurity.com/files/133998/Qualys-Security-Advisory-LibreSSL-Leak-Overflow.html
http://lists.opensuse.org/opensuse-updates/2015-10/msg00050.html
http://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.3.1-relnotes.txt