Secunia Security Advisory – Two vulnerabilities have been reported in openswan-2, which can be exploited by malicious people to cause a DoS (Denial of Service). 1) An error in the handling of IKE packets with an invalid 3DES key length can be exploited to cause a DoS. 2) An unknown error in the handling of certain specially crafted IKE packets can be exploited to cause a DoS. The vulnerabilities are related to: SA17553 The vulnerabilities have been reported in versions prior to 2.4.2.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41562/sa17581.txt
Source: https://packetstormsecurity.com/files/41562/Secunia-Security-Advisory-17581.html