[security bulletin] HPSBUX03577 SSRT102172 rev.1 - HP-UX VxFS, Local Unauthorized Access to Files

security-alert@xxxxxxx · Mon, 9 May 2016 16:16:21 -0700 (PDT)

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Note: the current version of the following document is available here:
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_n
a-c05121749

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c05121749
Version: 1

HPSBUX03577 SSRT102172 rev.1 - HP-UX VxFS, Local Unauthorized Access to Files

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

Release Date: 2016-05-09
Last Updated: 2016-05-09

Potential Security Impact: Local Unauthorized Access to Files

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
A potential security vulnerability has been identified in HP-UX VxFS ACL
inheritance. The vulnerability could result in local unauthorized access to
files.

Notes:

  - Default ACL entries "default:other:", "default:user:", and
"default:class:" are not inherited correctly.
  - There is a risk that file access restrictions may not be effective on
inherited ACLs to restrict file or directory access by other users, for
example, by defining "default:other:---" in a parent directory.
  - The defect does not impact "default:group:" entries.

References:

  - CVE-2016-2016
  - SSRT102172

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX 11iv3 VxFS 5.0, VxFS 5.0.1, VxFS 5.1SP1

  - Base-VxFS-50 B.05.00.01 through B.05.00.02
  - Base-VxFS-501 B.05.01.0 through B.05.01.03
  - Base-VxFS-51 B.05.10.00 through B.05.10.02

  Note: VxFS 4.1 on HP-UX 11iv3 and VxFS 5.0 on HP-UX 11iv2 are not affected.

BACKGROUND

CVSS 2.0 Base Metrics
===========================================================
  Reference              Base Vector             Base Score
CVE-2016-2016    (AV:L/AC:L/Au:S/C:P/I:N/A:N)       1.7
===========================================================
             Information on CVSS is documented
            in HP Customer Notice: HPSN-2008-002

RESOLUTION

HPE has released the following updates to resolve the vulnerability in HP-UX
11iv3 VxFS.

  - Base-VxFS-50

    PHKL_44459 VxFS 5.0 MP1P14

  - Base-VxFS-501

    PHKL_44411 VxFS 5.0.1 RP3P14

  - Base-VxFS-51

    PHKL_44439 VxFS 5.1 SP1RP3P6

  The updates are available for download at the following location:

    https://h20565.www2.hpe.com/portal/site/hpsc/patch/home

  Note: A valid HPE Passport account is needed to download the patches.
Please contact HPE Technical Support for assistance.

MANUAL ACTIONS: No

PRODUCT SPECIFIC INFORMATION

HP-UX Software Assistant: HP-UX Software Assistant is an enhanced application
that replaces HP-UX Security Patch Check. It analyzes all Security Bulletins
issued by HPE and lists recommended actions that may apply to a specific
HP-UX system. It can also download patches and create a depot automatically.
For more information see: https://h20392.www2.hpe.com/portal/swdepot/displayP
roductInfo.do?productNumber=B6834AA

The following text is for use by the HP-UX Software Assistant.

AFFECTED VERSIONS

For VxFS 5.0 MP1P14
HP-UX B.11.31
=============

VRTSvxfs.VXFS-KRN
action: install patch PHKL_44459 or subsequent

For VxFS 5.0.1 RP3P14
HP-UX B.11.31
=============

VRTSvxfs.VXFS-KRN
action: install patch PHKL_44411 or subsequent

For VxFS 5.1 SP1RP3P6
HP-UX B.11.31
=============

VRTSvxfs.VXFS-KRN
action: install patch PHKL_44439 or subsequent

END AFFECTED VERSIONS

HISTORY
Version:1 (rev.1) - 9 May 2016 Initial release

Third Party Security Patches: Third party security patches that are to be
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UX = HP-UX

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