Vulnerability Note VU#419128
IKE/IKEv2 protocol implementations may allow network amplification attacks
Original Release date: 29 Feb 2016 | Last revised: 04 Mar 2016

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

Description
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.

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

Solution
The CERT/CC is currently unaware of a full solution to this problem.

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 UpdatedGNU 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
Check Point Software TechnologiesUnknown12 Feb 201612 Feb 2016If you are a vendor and your product is affected, let
us know.View More &raquo

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

References

https://blogs.akamai.com/2016/02/ikeikev2-ripe-for-ddos-abuse.html
https://community.akamai.com/docs/DOC-5289
http://www.nta-monitor.com/wiki/index.php/Ike-scan_User_Guide
http://cwe.mitre.org/data/definitions/406.html
http://tools.ietf.org/html/rfc7296
http://tools.ietf.org/html/rfc2408

Credit

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:
04 Mar 2016

Document Revision:
31

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