The remote host is missing an update to net-snmp announced via advisory DSA 1663-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201663-1

Several vulnerabilities have been discovered in NET SNMP, a suite of Simple Network Management Protocol applications. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2008-0960 Wes Hardaker reported that the SNMPv3 HMAC verification relies on the client to specify the HMAC length, which allows spoofing of authenticated SNMPv3 packets. CVE-2008-2292 John Kortink reported a buffer overflow in the __snprint_value function in snmp_get causing a denial of service and potentially allowing the execution of arbitrary code via a large OCTETSTRING in an attribute value pair (AVP). CVE-2008-4309 It was reported that an integer overflow in the netsnmp_create_subtree_cache function in agent/snmp_agent.c allows remote attackers to cause a denial of service attack via a crafted SNMP GETBULK request. For the stable distribution (etch), these problems has been fixed in version 5.2.3-7etch4. For the testing distribution (lenny) and unstable distribution (sid) these problems have been fixed in version 5.4.1~dfsg-11. We recommend that you upgrade your net-snmp package.