Network Manager VPNC plugin (aka networkmanager-vpnc) before version 1.2.6 is vulnerable to a privilege escalation attack. A new line character can be used to inject a Password helper parameter into the configuration data passed to VPNC, allowing an attacker to execute arbitrary commands as root.
bugzilla.novell.com/show_bug.cgi?id=1101147
bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10900
download.gnome.org/sources/NetworkManager-vpnc/1.2/NetworkManager-vpnc-1.2.6.news
gitlab.gnome.org/GNOME/NetworkManager-vpnc/commit/07ac18a32b4
lists.debian.org/debian-lts-announce/2018/07/msg00048.html
pulsesecurity.co.nz/advisories/NM-VPNC-Privesc
security.gentoo.org/glsa/201808-03
www.debian.org/security/2018/dsa-4253
www.exploit-db.com/exploits/45313/