The remote Debian host is missing a security-related update.
Several remote vulnerabilities have been discovered in racoon, the Internet Key Exchange daemon of ipsec-tools. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2009-1574 Neil Kettle discovered a NULL pointer dereference on crafted fragmented packets that contain no payload. This results in the daemon crashing which can be used for denial of service attacks. - CVE-2009-1632 Various memory leaks in the X.509 certificate authentication handling and the NAT-Traversal keepalive implementation can result in memory exhaustion and thus denial of service.
Upgrade the ipsec-tools packages. For the oldstable distribution (etch), this problem has been fixed in version 0.6.6-3.1etch3. For the stable distribution (lenny), this problem has been fixed in version 0.7.1-1.3+lenny2.