The remote host is missing an update to dhcpcd announced via advisory DSA 2498-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202498-1

It was discovered that dhcpcd, a DHCP client, was vulnerable to a stack overflow. A malformed DHCP message could crash the client, causing a denial of service, and potentially remote code execution through properly designed malicous DHCP packets. For the stable distribution (squeeze), this problem has been fixed in version 1:3.2.3-5+squeeze1. For the testing distribution (wheezy), this problem has been fixed in version 1:3.2.3-11. For the unstable distribution (sid), this problem has been fixed in version 1:3.2.3-11. We recommend that you upgrade your dhcpcd package.