The remote host is missing an update to openssl announced via advisory USN-792-1.
Details follow:
It was discovered that OpenSSL did not limit the number of DTLS records it would buffer when they arrived with a future epoch. A remote attacker could cause a denial of service via memory resource consumption by sending a large number of crafted requests. (CVE-2009-1377)
It was discovered that OpenSSL did not properly free memory when processing DTLS fragments. A remote attacker could cause a denial of service via memory resource consumption by sending a large number of crafted requests. (CVE-2009-1378)
It was discovered that OpenSSL did not properly handle certain server certificates when processing DTLS packets. A remote DTLS server could cause a denial of service by sending a message containing a specially crafted server certificate. (CVE-2009-1379)
It was discovered that OpenSSL did not properly handle a DTLS ChangeCipherSpec packet when it occured before ClientHello. A remote attacker could cause a denial of service by sending a specially crafted request. (CVE-2009-1386)
It was discovered that OpenSSL did not properly handle out of sequence DTLS handshake messages. A remote attacker could cause a denial of service by sending a specially crafted request. (CVE-2009-1387)
Solution: The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 6.06 LTS: libssl0.9.8 0.9.8a-7ubuntu0.9
Ubuntu 8.04 LTS: libssl0.9.8 0.9.8g-4ubuntu3.7
Ubuntu 8.10: libssl0.9.8 0.9.8g-10.1ubuntu2.4
Ubuntu 9.04: libssl0.9.8 0.9.8g-15ubuntu3.2
After a standard system upgrade you need to reboot your computer to effect the necessary changes.