[security bulletin] HPSBGN03645 rev.2 - HPE Helion OpenStack Glance, Remote Access Restriction Bypass, Unauthorized Access

security-alert@xxxxxxx · Wed, 21 Sep 2016 13:16:21 -0700 (PDT)

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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-c05273584

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c05273584
Version: 2

HPSBGN03645 rev.2 - HPE Helion OpenStack Glance, Remote Access Restriction
Bypass, Unauthorized Access

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

Release Date: 2016-09-15
Last Updated: 2016-09-15

Potential Security Impact: Remote Access Restriction Bypass, Unauthorized
Access

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
Potential vulnerabilities have been identified in HPE Helion OpenStack
Glance. The vulnerabilities can be remotely exploited to allow access
restriction bypass and unauthorized access.

Note:
A malicious tenant is able to reuse deleted Glance image IDs to share
malicious images with other tenants in a manner that is undetectable to the
victim tenant if the Helion OpenStack administrators have both:

  1. Edited the policy.json file to allow non-admin tenants to share images
with other tenants or edited policy.json to allow non-admin tenants to create
public images.
  2. Deleted image IDs from the Glance database, either manually or using the
purge tool ("glance-manage db purge").

    Further details are available in OSSN-0075 here:
https://wiki.openstack.org/wiki/OSSN/OSSN-0075.

References:

  - CVE-2016-4383
  - OSSN-0075
  - PSRT110227, PSRT110231

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

HPE Helion CloudSystem all
HPE Helion OpenStack all

BACKGROUND

  CVSS Base Metrics
  =================
  Reference, CVSS V3 Score/Vector, CVSS V2 Score/Vector

    CVE-2016-4383
      7.6 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
      9.0 (AV:N/AC:L/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-c01345499

RESOLUTION

HPE has provided the following mitigation instructions for HPE Helion
OpenStack Glance:

 * This procedure ensures that images shared between two tenants who trust
each other are not maliciously replaced by a malicious tenant reusing a
deleted image ID. Perform the following action:

  1. The admin should update the policy.json file so that only admins can
deactivate/reactivate images:
    "deactivate": "role:admin",
    "reactivate": "role:admin",
  2. All public or shared images should be quarantined by marking them as
deactivated using the Glance API.
  3. The admin should inspect all public/shared images to see if they have
been replaced by malicious images.
  4. Any images which cannot be confirmed to be non-malicious should be left
deactivated.
  5. Images which can be confirmed to be non-malicious images can be
reactivated using the Glance API.

    * **Note:** Images can be confirmed to be non-malicious for example by
examining the Glance logs or backup Glance databases to show that the image
ID has not been recycled.

HISTORY

Version:1 (rev.1) - 16 September 2016 Initial release
Version:2 (rev.2) - 15 September 2016 Corrected URL

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