Null pointer dereference

The pluto IKE daemon in Openswan and Strongswan IPsec 2.6 before 2.6.21 and 2.4 before 2.4.14, and Strongswan 4.2 before 4.2.14 and 2.8 before 2.8.9, allows remote attackers to cause a denial of service daemon crash and restart via a crafted 1 RUTHERE or 2 RUTHEREACK Dead Peer Detection DPD IPsec...