The remote host is missing an update to openswan announced via advisory DSA 1760-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201760-1

Two vulnerabilities have been discovered in openswan, an IPSec implementation for linux. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2008-4190 Dmitry E. Oboukhov discovered that the livetest tool is using temporary files insecurely, which could lead to a denial of service attack. CVE-2009-0790 Gerd v. Egidy discovered that the Pluto IKE daemon in openswan is prone to a denial of service attack via a malicious packet. For the stable distribution (lenny), this problem has been fixed in version 2.4.12+dfsg-1.3+lenny1. For the oldstable distribution (etch), this problem has been fixed in version 2.4.6+dfsg.2-1.1+etch1. For the testing distribution (squeeze) and the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your openswan packages.