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[security bulletin] HPSBGN03527 rev.1 - HPE Helion Eucalyptus, Remote Access Restriction Bypass



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a-c04926482

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c04926482
Version: 1

HPSBGN03527 rev.1 - HPE Helion Eucalyptus, Remote Access Restriction Bypass

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

Release Date: 2015-12-21
Last Updated: 2015-12-21

Potential Security Impact: Remote Access Restriction Bypass, Increase in
Privilege

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
A potential security vulnerability has been identified with HPE Helion
Eucalyptus. The vulnerability could be exploited to bypass access permissions
by a remote authenticated user.

Notes:

  - In Eucalyptus, following the AWS model, IAM roles are used to temporarily
allow users or services to access resources within or across accounts. Access
to roles is determined by the role.s trust policy and a set of user
permissions. The trust policy is associated with a role and defines which
accounts or services are allowed to assume the role. User permissions are
defined by the policy associated with the user, and define a set of actions
and resources that the user is allowed to access.

  - An issue has been identified in how Eucalyptus checks user permissions
when allowing a user to assume a role. Given that the grant policy allows the
user.s account to assume the role, any user in that account would be able to
assume the role, even if the user.s policy does not explicitly grant the
AssumeRole permission for the role. As a result, in some cases authenticated
users could gain privileges by assuming an IAM role that they were not
intended to have access to. The impact is mitigated by the fact that the
role.s trust policy still has to explicitly authorize the user.s account to
access the role.

References:

  CVE-2015-6861
  PSRT102965

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HPE Helion Eucalyptus 3.4.0 to 4.2.0

BACKGROUND

CVSS 2.0 Base Metrics
===========================================================
  Reference              Base Vector             Base Score
CVE-2015-6861    (AV:N/AC:H/Au:S/C:P/I:P/A:P)       4.6
===========================================================
             Information on CVSS is documented
            in HP Customer Notice: HPSN-2008-002

RESOLUTION

HPE has made the following software updates available to resolve the
vulnerability.

  - HPE Helion Eucalyptus 4.2.1

  Instructions for downloading and upgrading to the latest HPE Helion
Eucalyptus software are available at the following location:

  http://www8.hp.com/us/en/cloud/helion-eucalyptus-downloads.html

HISTORY
Version:1 (rev.1) - 21 December 2015 Initial release

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@xxxxxxx.

Report: To report a potential security vulnerability with any HPE supported
product, send Email to: security-alert@xxxxxxx

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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 2015 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
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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
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referenced herein are trademarks of Hewlett Packard Enterprise in the United
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