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Category:   OS (UNIX)  >   HP-UX Vendors:   HPE
HP-UX VxFS Flaw Lets Users View Certain Files on the Target System
SecurityTracker Alert ID:  1035816
SecurityTracker URL:
CVE Reference:   CVE-2016-2016   (Links to External Site)
Date:  May 10 2016
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 11iv3; VxFS 5.0, VxFS 5.0.1, VxFS 5.1SP1
Description:   A vulnerability was reported in HP-UX VxFS. A local user can access certain files on the target system.

A local user can exploit an access control list (ACL) inheritance flaw to view certain files on the target system.

The "default:other:", "default:user:", and "default:class:" ACL entries are not properly inherited.

The "default:group:" entries are not affected.

Impact:   A local user can view certain files on the target system.
Solution:   HPE has issued a fix.

For Base-VxFS-50: PHKL_44459 VxFS 5.0 MP1P14
For Base-VxFS-501: PHKL_44411 VxFS 5.0.1 RP3P14
For Base-VxFS-51: PHKL_44439 VxFS 5.1 SP1RP3P6

The HPE advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error

Message History:   None.

 Source Message Contents

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

Hash: SHA1

Note: the current version of the following document is available here:


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

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


  - 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.


  - 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.


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


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:

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



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:

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


For VxFS 5.0 MP1P14
HP-UX B.11.31

action: install patch PHKL_44459 or subsequent

For VxFS 5.0.1 RP3P14
HP-UX B.11.31

action: install patch PHKL_44411 or subsequent

For VxFS 5.1 SP1RP3P6
HP-UX B.11.31

action: install patch PHKL_44439 or subsequent


Version:1 (rev.1) - 9 May 2016 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

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

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

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alerts via Email:

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

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

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.

Version: GnuPG v1


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