Cisco IOS XE Software Multicast Network Time Protocol Denial of Service Vulnerability (cisco-sa-20130925-ntp)

This script is Copyright (C) 2013-2015 Tenable Network Security, Inc.

Synopsis :

The remote device is missing a vendor-supplied security patch.

Description :

A vulnerability in the implementation of the Network Time Protocol
(NTP) feature in Cisco IOS XE Software allows an unauthenticated,
remote attacker to cause an affected device to reload, resulting in a
denial of service (DoS) condition. The vulnerability is due to
improper handling of multicast NTP packets that are sent to an
affected device encapsulated in a Multicast Source Discovery Protocol
(MSDP) Source-Active (SA) message from a configured MSDP peer. An
attacker can exploit this vulnerability by sending multicast NTP
packets to an affected device. Repeated exploitation can result in a
sustained DoS condition. Cisco has released free software updates that
address this vulnerability. A workaround is available to mitigate this

See also :

Solution :

Apply the relevant patch referenced in Cisco security advisory

Risk factor :

High / CVSS Base Score : 7.1
CVSS Temporal Score : 6.2
Public Exploit Available : true

Family: CISCO

Nessus Plugin ID: 70321 ()

Bugtraq ID: 62640

CVE ID: CVE-2013-5472