SUPPORT COMMUNICATION – SECURITY BULLETIN

Document ID: c04197764

Version: 1HPSBHF02981 rev.4 – HPE Integrated Lights-Out 2, 3, 4, 5 (iLO 2, iLO 3, iLO 4, and iLO 5) 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: 2018-06-13

Last Updated: 2018-06-13


Potential Security Impact: Remote: Disclosure of Information

Source: Hewlett Packard Enterprise, HPE Product Security Response Team

VULNERABILITY SUMMARY

A potential security vulnerability has been identified in HPE Integrated Lights-Out 2, 3, 4, 5 (iLO 2, iLO 3, iLO 4, and iLO 5) 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 Integrated Lights-Out 5 (iLO 5) for HPE Gen10 Servers – All Gen10, including Synergy Gen10 Compute Modules when IPMI over LAN is enabled – IPMI over LAN is disabled by default on iLO 5
  • HPE Integrated Lights-Out 4 (iLO 4) – All Gen8 and Gen9, including Synergy Gen9 Compute Modules when IPMI over LAN is enabled
  • HPE Integrated Lights-Out 3 (iLO 3) – All G7 when IPMI over LAN is enabled
  • HPE Integrated Lights-Out 2 (iLO 2) – All G6 when IPMI over LAN is enabled
  • HPE Superdome Flex Server – All when IPMI over LAN is enabled
  • HPE Integrity Superdome X Server – All when IPMI over LAN is enabled

BACKGROUND

CVSS Version 3.0 and Version 2.0 Base Metrics

ReferenceV3 VectorV3 Base ScoreV2 VectorV2 Base Score
CVE-2013-4786CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H8.3(AV:N/AC:M/Au:S/C:C/I:C/A:C)8.5

Information on CVSS is documented in HPE Customer Notice: HPSN-2008-002

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 iLO 2, 3, 4 and 5 using the Disable IPMI over LAN command. IPMI over LAN is disabled by default on iLO 5.
  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 HPE Integrity Servers: Superdome X and Superdome Flex:

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
  • Version:3 (rev.3) – 21 May 2018 Added iLO 5 Gen10 and iLO 4/5 Gen9 and Gen10 Synergy Compute Modules and Integrity Servers
  • Version:4 (rev.4) – 31 May 2018 Updated HPE Integrity Superdome X Server Information

Sorgente: HPESBHF03769 rev.4 – HPE Integrated Lights-out 4 (iLO 4) Multiple Remote Vulnerabilities