Cisco Security Advisory
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A vulnerability in the Network Time Protocol (NTP) package of several Cisco products could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to processing MODE_PRIVATE (Mode 7) NTP control messages, which have a large amplification vector. An attacker could exploit this vulnerability by sending Mode 7 control requests to NTP servers and observing responses amplified up to 5,500 times in size. An exploit could allow the attacker to cause a DoS condition in which the affected NTP server is forced to process and respond with large response data.
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Product More Information CVSS Cisco NX-OS Software CSCum52148 5.0/4.5 IOS CSCtd75033 5.0/4.1 Cisco IOS XE Software CSCtd75033 5.0/4.1 Cisco Unified Communications Manager CSCum76937 5.0/4.5 Cisco MXE 3500 (Media Experience Engine) CSCum71311 5.0/4.5 Cisco Videoscape Distribution Suite Transparent Caching (VDS TC) CSCum93691 5.0/4.1 Cisco Digital Content Manager (DCM) Software CSCun23321 5.0/4.8 Cisco Video Surveillance Operations Manager Software CSCun44909 5.0/4.8 Cisco Unified Contact Center Express CSCun84909 5.0/4.8 Cisco MediaSense CSCun84918 5.0/4.8 Cisco SocialMiner CSCun84924 5.0/4.8 Cisco Finesse CSCun84934 5.0/4.8 Cisco Unified Intelligence Center CSCun84943 5.0/4.8 Cisco Application and Content Networking System (ACNS) Software CSCuo21109 5.0/4.8 Cisco Emergency Responder CSCun90157 5.0/4.1 Cisco Unified MeetingPlace CSCur38341 5.0/4.8
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There are no workarounds that address this vulnerability.
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What Is a Cisco Security Notice?
The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco Security Notices to inform customers of low- to mid-level severity security issues involving Cisco products.
Customers who wish to upgrade to a software version that includes fixes for these issues should contact their normal support channels. Free software updates will not be provided for issues that are disclosed through a Cisco Security Notice.
For additional information about Cisco PSIRT publications, see the Cisco Security Vulnerability Policy at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html
Customers Using Third-Party Support Organizations
Customers may have Cisco products that are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers. For these products, customers should consult their service providers or support organizations to ensure that any applied workaround or fix is the most appropriate in the intended network before it is deployed.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2014-JAN-09
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