Executive Summary

Summary
Title Cisco IOS Software Multicast Network Time Protocol Denial of Service Vulnerability
Informations
Name cisco-sa-20130925-ntp First vendor Publication 2013-09-25
Vendor Cisco Last vendor Modification 2013-09-25
Severity (Vendor) N/A Revision 1.0

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.1 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A vulnerability in the implementation of the Network Time Protocol (NTP) feature in Cisco IOS Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.

The vulnerability is due to the 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 could exploit this vulnerability by sending multicast NTP packets to an affected device. Repeated exploitation could result in a sustained DoS condition.

Cisco has released free software updates that address this vulnerability. A workaround is available to mitigate this vulnerability.

This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130925-ntp

Note: The September 25, 2013, Cisco IOS Software Security Advisory bundled publication includes eight Cisco Security Advisories. All advisories address vulnerabilities in Cisco IOS Software. Each Cisco IOS Software Security Advisory lists the Cisco IOS Software releases that correct the vulnerability or vulnerabilities detailed in the advisory as well as the Cisco IOS Software releases that correct all Cisco IOS Software vulnerabilities in the September 2013 bundled publication.

Individual publication links are in "Cisco Event Response: Semiannual Cisco IOS Software Security Advisory Bundled Publication" at the following link: http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep13.html

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Original Source

Url : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco (...)

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 7
Os 40

Information Assurance Vulnerability Management (IAVM)

Date Description
2013-10-03 IAVM : 2013-A-0185 - Multiple Vulnerabilities in Cisco IOS XE
Severity : Category I - VMSKEY : V0040708
2013-10-03 IAVM : 2013-A-0184 - Multiple Vulnerabilities in Cisco IOS
Severity : Category I - VMSKEY : V0040709

Nessus® Vulnerability Scanner

Date Description
2013-10-07 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20130925-ntp-iosxe.nasl - Type : ACT_GATHER_INFO
2013-10-07 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20130925-ntp.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
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Date Informations
2014-02-17 10:22:11
  • Multiple Updates
2013-11-11 12:37:34
  • Multiple Updates
2013-09-27 21:23:25
  • Multiple Updates
2013-09-25 21:19:10
  • First insertion