The gmp plugin in strongSwan before 5.7.1 has a Buffer Overflow via a crafted certificate.
https://www.strongswan.org/blog/2018/10/01/strongswan-vulnerability-%28cve-2018-17540%29.html
https://www.debian.org/security/2018/dsa-4309
https://usn.ubuntu.com/3774-1/
https://security.gentoo.org/glsa/201811-16
https://lists.debian.org/debian-lts-announce/2018/10/msg00001.html
https://download.strongswan.org/security/CVE-2018-17540/
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00077.html