Executive Summary

Title Cisco IOS and IOS XE Software Internet Key Exchange Version 1 Fragmentation Denial of Service Vulnerability
Name cisco-sa-20160928-ios-ikev1 First vendor Publication 2016-09-28
Vendor Cisco Last vendor Modification 2016-09-28
Severity (Vendor) N/A Revision N/A

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


A vulnerability in the Internet Key Exchange version 1 (IKEv1) fragmentation code of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an exhaustion of available memory or a reload of the affected system.

The vulnerability is due to the improper handling of crafted, fragmented IKEv1 packets. An attacker could exploit this vulnerability by sending crafted UDP packets to the affected system. An exploit could allow the attacker to cause a reload of the affected system.

Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability can be triggered by IPv4 and IPv6 traffic.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ios-ikev1

This advisory is part of the September 28, 2016, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 10 Cisco Security Advisories that describe 11 vulnerabilities. All the vulnerabilities have a Security Impact Rating of High. For a complete list of the advisories and links to them, see Cisco Event Response: September 2016 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.

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Original Source

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

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-399 Resource Management Errors

CPE : Common Platform Enumeration

Os 589
Os 105
Os 2
Os 3
Os 2
Os 8

Snort® IPS/IDS

Date Description
2016-03-14 Cisco IOS invalid IKE fragment length memory corruption or exhaustion attempt
RuleID : 37675 - Revision : 3 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

Date Description
2016-11-14 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20160928-ikev1-ios.nasl - Type : ACT_GATHER_INFO
2016-11-14 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20160928-ikev1-iosxe.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2016-11-16 13:26:22
  • Multiple Updates
2016-10-06 05:22:38
  • Multiple Updates
2016-10-05 21:24:15
  • Multiple Updates
2016-09-28 21:23:38
  • First insertion