[security bulletin] HPSBUX03596 rev.2 - HPE HP-UX running CIFS Server (Samba), Remote Access Restriction Bypass, Unauthorized Access

Note: the current version of the following document is available here:
https://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05121842

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c05121842
Version: 2

HPSBUX03596 rev.2 - HPE HP-UX running CIFS Server (Samba), Remote Access
Restriction Bypass, Unauthorized Access

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

Release Date: 2017-03-09
Last Updated: 2017-03-08

Potential Security Impact: Remote: Access Restriction Bypass, Gain
Unauthorized Access

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
A security vulnerability in Samba was addressed by HPE HP-UX running CIFS
Server (Samba). The vulnerability could be exploited resulting in remote
access restriction bypass and unauthorized access.

References:

  - CVE-2015-7560 - Vulnerability in SMB1 implementation in smbd in Samba

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

  - HP-UX Common Internet File System (CIFS), Client/Server Software -
CIFS-SERVER versions prior to B.04.05.03.00 on IPF system and upto
B.04.05.03.00 on PA-RISC

BACKGROUND

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

    CVE-2015-7560
      6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
      4.0 (AV:N/AC:L/Au:S/C:N/I:P/A:N)

    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 to resolve the vulnerability in the
HP-UX CIFS-SERVER

**For IPF system**

Please download and install HP-UX CIFS SERVER B.04.05.03.00 for HP-UX Release
B.11.31 on IPF systems from the following location:

<https://h20392.www2.hpe.com/portal/swdepot/displayProductInfo.do?productNumb
r=B8725AA>

**For PA-RISC system**

Apply either one of the following workarounds:

  **Workaround 1:**
Add the parameter:
**unix extensions = no** to the [global] section of smb.conf and restart
smbd.

  **Workaround 2:** Prohibit the use of SMB1 by setting the parameter:
**server min protocol = SMB2** to the [global] section of smb.conf and
restart smbd.

HISTORY

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

Version:2 (rev.2) - 8 March 2017 Update after release of new version


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@hpe.com.

Report: To report a potential security vulnerability for any HPE supported
product:
  Web form: https://www.hpe.com/info/report-security-vulnerability
  Email: security-alert@hpe.com

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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

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