Vulnerability Note VU#419128

IKE/IKEv2 protocol implementations may allow network amplification attacks

Original Release date: 29 Feb 2016 | Last revised: 18 Jul 2017


Implementations of the IKEv2 protocol are vulnerable to network amplification attacks.


CWE-406: Insufficient Control of Network Message Volume (Network Amplification)

IKE/IKEv2 and other UDP-based protocols can be used to amplify denial-of-service attacks. In some scenarios, an amplification of up to 900% may be obtained from IKEv2 server implementations.

More details are provided in a white paper from the researcher.


An unauthenticated remote attacker may leverage the vulnerable IKE/IKEv2 server to conduct a distributed reflective denial-of-service (DRDoS) attack on another user.


The CERT/CC is currently unaware of a full solution to this problem. Some vendors have addressed this issue separately; please see the affected vendors list below.

Please consider one of the workarounds listed below.

A full solution may require revisions to RFC 7296 and/or RFC 2408.

Perform Egress Filtering

Configure your router/firewall to perform egress filtering, which may help to mitigate attacks that utilize source IP spoofing. Please refer to your product's documentation for instructions on how to perform egress filtering.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Oracle CorporationAffected12 Feb 201618 Jul 2017
GNU glibcNot Affected12 Feb 201615 Feb 2016
Microsoft CorporationNot Affected12 Feb 201604 Mar 2016
ACCESSUnknown12 Feb 201612 Feb 2016
Alcatel-LucentUnknown12 Feb 201612 Feb 2016
AppleUnknown12 Feb 201612 Feb 2016
Arch LinuxUnknown12 Feb 201612 Feb 2016
Arista Networks, Inc.Unknown12 Feb 201612 Feb 2016
Aruba NetworksUnknown12 Feb 201612 Feb 2016
AT&TUnknown12 Feb 201612 Feb 2016
Avaya, Inc.Unknown12 Feb 201612 Feb 2016
Belkin, Inc.Unknown12 Feb 201612 Feb 2016
Brocade Communication SystemsUnknown12 Feb 201612 Feb 2016
CA TechnologiesUnknown12 Feb 201612 Feb 2016
CentOSUnknown12 Feb 201612 Feb 2016
If you are a vendor and your product is affected, let us know.View More »

CVSS Metrics (Learn More)

Group Score Vector
Base 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
Temporal 6.7 E:POC/RL:W/RC:C
Environmental 6.7 CDP:ND/TD:H/CR:ND/IR:ND/AR:ND



Thanks to Chad Seaman of Akamai for reporting this vulnerability.

This document was written by Garret Wassermann.

Other Information

  • CVE IDs: Unknown
  • Date Public: 25 Feb 2016
  • Date First Published: 29 Feb 2016
  • Date Last Updated: 18 Jul 2017
  • Document Revision: 34


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