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[security bulletin] HPSBHF02981 rev.2 - HPE Integrated Lights-Out 2, 3, 4 (iLO2, iLO3, iLO4) and HPE Superdome Flex RMC - IPMI 2.0 RCMP+ Authentication Remote Password Hash Vulnerability (RAKP) Feb 07 2018 08:20PM
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Note: the current version of the following document is available here:

https://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c041977
64

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c04197764

Version: 2

HPSBHF02981 rev.2 - HPE Integrated Lights-Out 2, 3, 4 (iLO2, iLO3, iLO4) and

HPE Superdome Flex RMC - IPMI 2.0 RCMP+ Authentication Remote Password Hash

Vulnerability (RAKP)

NOTICE: The information in this Security Bulletin should be acted upon as

soon as possible.

Release Date: 2018-02-08

Last Updated: 2018-02-07

Potential Security Impact: Remote: Disclosure of Information

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY

A potential security vulnerability has been identified in HPE Integrated

Lights-Out 2, 3, 4 (iLO2, iLO3, iLO4) and HPE Superdome Flex RMC. The

vulnerability could be exploited to allow an attacker to gain unauthorized

privileges and unauthorized access to privileged information.

**Note:**

- This vulnerability also impacts the RMC of the "Superdome Flex" Server.

References:

- CVE-2013-4786

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

- HPE Superdome Flex Server 1.0

- HPE Integrated Lights-Out 4 (iLO 4) Firmware for ProLiant Gen8 Servers -

All, when IPMI is enabled

- HPE Integrated Lights-Out 3 (iLO 3) Firmware for ProLiant G7 Servers -

All, when IPMI is enabled

- HPE Integrated Lights-Out 2 (iLO 2) Firmware for ProLiant G6 Servers -

All, when IPMI is enabled

BACKGROUND

CVSS Base Metrics

=================

Reference, CVSS V3 Score/Vector, CVSS V2 Score/Vector

CVE-2013-4786

8.3 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

8.5 (AV:N/AC:M/Au:S/C:C/I:C/A:C)

Information on CVSS is documented in

HPE Customer Notice HPSN-2008-002 here:

https://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c013454
99

RESOLUTION

There is no resolution to this issue. The authentication process for the IPMI

2.0 specification mandates that the server send a salted SHA1 or MD5 hash of

the requested user's password to the client, prior to the client

authenticating. The BMC returns the password hash for any valid user account

requested. This password hash can be broken using an offline brute force or

dictionary attack. Because this functionality is a key part of the IPMI 2.0

specification, there is no way to fix the problem without deviating from the

IPMI 2.0 specification. HP recommends the following actions to mitigate the

risk this introduces:

1. If you do not need to use IPMI, disable it. You can disable IPMI on

iLO2/3/4 using the Disable IPMI over LAN command.

2. Maintain the latest iLO firmware that contains the most recent security

patches.

3. Employ best practices in the management of the protocols and passwords on

your systems and networks. Use strong passwords wherever possible.

4. If you must use IPMI, use a separate management LAN or VLAN, Access

Control Lists (ACLs), or VPN to limit and restrict access to your iLO

management interfaces.

For Superdome Flex's RMC:

* Refer to the below link for the details:

<https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-a00026813e
n_us>

HISTORY

Version:1 (rev.1) - 1 April 2014 Initial release

Version:2 (rev.2) - 7 February 2018 Include RMC of HPE Superdome Flex as an

affected product

Third Party Security Patches: Third party security patches that are to be

installed on systems running Hewlett Packard Enterprise (HPE) software

products should be applied in accordance with the customer's patch management

policy.

Support: For issues about implementing the recommendations of this Security

Bulletin, contact normal HPE Services support channel. For other issues about

the content of this Security Bulletin, send e-mail to security-alert (at) hpe (dot) com. [email concealed]

Report: To report a potential security vulnerability for any HPE supported

product:

Web form: https://www.hpe.com/info/report-security-vulnerability

Email: security-alert (at) hpe (dot) com [email concealed]

Subscribe: To initiate a subscription to receive future HPE Security Bulletin

alerts via Email: http://www.hpe.com/support/Subscriber_Choice

Security Bulletin Archive: A list of recently released Security Bulletins is

available here: http://www.hpe.com/support/Security_Bulletin_Archive

Software Product Category: The Software Product Category is represented in

the title by the two characters following HPSB.

3C = 3COM

3P = 3rd Party Software

GN = HPE General Software

HF = HPE Hardware and Firmware

MU = Multi-Platform Software

NS = NonStop Servers

OV = OpenVMS

PV = ProCurve

ST = Storage Software

UX = HP-UX

Copyright 2016 Hewlett Packard Enterprise

Hewlett Packard Enterprise shall not be liable for technical or editorial

errors or omissions contained herein. The information provided is provided

"as is" without warranty of any kind. To the extent permitted by law, neither

HP or its affiliates, subcontractors or suppliers will be liable for

incidental,special or consequential damages including downtime cost; lost

profits; damages relating to the procurement of substitute products or

services; or damages for loss of data, or software restoration. The

information in this document is subject to change without notice. Hewlett

Packard Enterprise and the names of Hewlett Packard Enterprise products

referenced herein are trademarks of Hewlett Packard Enterprise in the United

States and other countries. Other product and company names mentioned herein

may be trademarks of their respective owners.

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