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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-hpesbhf03730en_us

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: hpesbhf03730en_us
Version: 2

HPESBHF03730 rev.2 - HPE Aruba ClearPass Policy Manager, Multiple
Vulnerabilities

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

Release Date: 2017-06-09
Last Updated: 2017-06-09

Potential Security Impact: Remote: Access Restriction Bypass, Arbitrary
Command Execution, Cross-Site Scripting (XSS), Disclosure of Information,
Escalation of Privilege

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
Potential security vulnerabilities have been identified in HPE Aruba
ClearPass Policy Manager. The vulnerabilities could be remotely exploited to
allow access restriction bypass, arbitrary command execution, cross site
scripting (XSS), escalation of privilege and disclosure of information.

References:

  - PSRT110521
  - CVE-2017-5824 - unauthenticated remote Code Execution
  - CVE-2017-5825 - privilege escalation
  - CVE-2017-5826 - authenticated Remote Code Execution
  - CVE-2017-5827 - reflected XSS
  - CVE-2017-5828 - arbitrary command execution via Xml External entity (XXE)
  - CVE-2017-5829 - access restriction bypass
  - CVE-2017-5647 - Apache Tomcat, information disclosure

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

  - Aruba ClearPass Enterprise Software  - All ClearPass 6.6.x versions
without hotfix patch for CVE-2017-5647/CVE-2017-5824/CVE-2017-5829 applied

BACKGROUND

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

    CVE-2017-5647
      7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
      5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N)

    CVE-2017-5824
      8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
      7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C)

    CVE-2017-5825
      5.0 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
      4.6 (AV:N/AC:H/Au:S/C:P/I:P/A:P)

    CVE-2017-5826
      5.0 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
      4.6 (AV:N/AC:H/Au:S/C:P/I:P/A:P)

    CVE-2017-5827
      4.6 CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
      4.6 (AV:N/AC:H/Au:S/C:P/I:P/A:P)

    CVE-2017-5828
      4.2 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
      3.6 (AV:N/AC:H/Au:S/C:P/I:P/A:N)

    CVE-2017-5829
      3.6 CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
      2.6 (AV:L/AC:H/Au:N/C:P/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

Hewlett Packard Enterprise would like to thank the following researchers for
reporting issues to security-alert@hpe.com:  

 * Luke Young (@TheBoredEng) for reporting CVE-2017-5824 through the BugCrowd
managed bug bounty program.
 * Luke Young (@TheBoredEng) for reporting CVE-2017-5825 through the BugCrowd
managed bug bounty program.
 * "fmast" for reporting CVE-2017-5826 through the BugCrowd BugCrowd managed
bug bounty program.
 * Phil Purviance (@superevr) of Bishop Fox for reporting CVE-2017-5827.
 * V. Harishkumar (@harishkumar0394) for reporting CVE-2017-5828 through the
BugCrowd managed bug bounty program.
 * Luke Young (@TheBoredEng) for reporting CVE-2017-5829 through the BugCrowd
managed bug bounty program.

RESOLUTION

HPE Aruba has provided the following resolution - Upgrade to ClearPass Policy
Manager version 6.6.5 and then apply an additional hotfix. ClearPass 6.6.5
was released on March 30, 2017 and an updated version was released April 12,
2017. The additional hotfix is applicable to both versions of ClearPass 6.6.5
and was released on May 24, 2017.  All future releases of ClearPass will
include these fixes when released. 

Installing the Patch Online Using the Software Updates Portal:  

  1. Open ClearPass Policy Manager and go to `Administration - Agents and
Software Updates - Software Updates`.  
  2. In the Firmware and Patch Updates area, find the "ClearPass Cumulative
Patch 5 for 6.6.0, 6.6.1, 6.6.2, 6.6.3 and 6.6.4" and click the Download
button in its row.  
  3. Click Install.  
  4. When the installation is complete and the status is shown as "Needs
Restart", proceed to restart ClearPass. After reboot, the status for the
patch will be shown as Installed in `Administration - Agents and Software
Updates - Software Updates page`.  
  5. While in the Firmware and Patch Updates area, find the "ClearPass 6.6.5
Hotfix Patch for CVE-2017-5647, CVE-2017-5824, and CVE-2017-5829" and click
the Download button in its row.  
  6. Click Install.  
  7. When the installation is complete and the status is shown as "Needs
Restart", proceed to restart ClearPass. After reboot, the status for the
patch will be shown as Installed. The ClearPass Policy Manager version number
will not change.  

Installing the Patch Offline Using the Patch File from
<https://support.arubanetworks.com>:  

1.  Download the "6.6.0 Cumulative Patch 5 (6.6.5)" and "ClearPass 6.6.5
Hotfix Patch for CVE-2017-5647, CVE-2017-5824, and CVE-2017-5829" from the
Support site.  
2.  Open the ClearPass Policy Manager Admin UI and go to `Administration -
Agents and Software Updates - Software Updates`.  
3.  At the bottom of the Firmware and Patch Updates area, click Import Updates
and browse to the downloaded "6.6.0 Cumulative Patch 5 (6.6.5)" file.  
4.  Click Install.  
5.  When the installation is complete and the status is shown as Needs
Restart, proceed to restart ClearPass. After reboot, the status for the patch
will be shown as Installed in Administration - Agents and Software Updates -
Software Updates page.  
6.  At the bottom of the Firmware and Patch Updates area, click Import Updates
and browse to the downloaded " ClearPass 6.6.5 Hotfix Patch for
CVE-2017-5647, CVE-2017-5824, and CVE-2017-5829" file.  
7.  Click Install.  
8.  When the installation is complete and the status is shown as "Needs
Restart", proceed to restart ClearPass. After reboot, the status for the
patch will be shown as Installed. The ClearPass Policy Manager version number
will not change.  

**Notes:**  

 * **Temporary Mitigation**: These attacks require network access to the
ClearPass administrative Web interface to execute. As a general best practice
it is recommended that all administrative access be restricted to trusted
user networks exclusively. This applies to the Policy Manager Admin Web
Interface and SSH consoles. This is best accomplished through a comprehensive
network security policy that restricts administrative access to ClearPass
administration interfaces.  
 * Restricting access to the Policy Manager Admin Web Interface can be
accomplished by navigating to `Administration - Server Manager - Server
Configuration - 'Server-Name' - Network - Restrict Access`and only allowing
non-public or network management networks.  
 
 **Note:** Please contact HPE Aruba Technical Support if any assistance is
needed.

HISTORY

Version:1 (rev.1) - 25 May 2017 Initial release

Version:2 (rev.2) - 9 June 2017 Updated affected 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

Subscribe: To initiate a subscription to receive future HPE Security Bulletin
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Software Product Category: The Software Product Category is represented in
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Copyright 2016 Hewlett Packard Enterprise

Hewlett Packard Enterprise shall not be liable for technical or editorial
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