[security bulletin] HPSBGN03117 rev.1 - HP Remote Device Access: Virtual Customer Access System (vCAS) running Bash Shell, Remote Code Execution

Type securityvulns
Reporter Securityvulns
Modified 2014-10-05T00:00:00



Note: the current version of the following document is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/ docDisplay?docId=emr_na-c04467807


Document ID: c04467807 Version: 1

HPSBGN03117 rev.1 - HP Remote Device Access: Virtual Customer Access System (vCAS) running Bash Shell, Remote Code Execution

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

Release Date: 2014-09-30 Last Updated: 2014-09-30

Potential Security Impact: Remote code execution

Source: Hewlett-Packard Company, HP Software Security Response Team

VULNERABILITY SUMMARY A potential security vulnerability has been identified with HP Remote Device Access: Virtual Customer Access System (vCAS) running Bash Shell . This is the Bash Shell vulnerability known as "ShellShock" which could be exploited remotely to allow execution of code.

NOTE: The vCAS product is vulnerable only if DHCP is enabled.


CVE-2014-6271 CVE-2014-7169 SSRT101724

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

vCAS version 14.06 (RDA 8.1)


CVSS 2.0 Base Metrics

Reference Base Vector Base Score CVE-2014-6271 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 CVE-2014-7169 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10.0 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002


HP is actively working to address this vulnerability for the impacted product versions of HP Remote Device Access: Virtual Customer Access System (vCAS) running Bash Shell. This bulletin will be revised when the software update is released.

NOTE: HP recommends to not power-down or disconnect the vCAS until the update is available.


A Shellshock attack requires the definition of an environment variable introduced into Bash. The vCAS has three attack vectors: SSH, the lighttpd web server, and the DHCP client.

  • The exploit does not elevate privileges.
  • The SSH and webserver exploits require vCAS credentials so there is no risk for unauthorized access or code execution through this vulnerability.

The DHCP client uses Bash scripts and is vulnerable to Shellshock. The DHCP exploit can be mitigated by ensuring that DHCP is disabled on the vCAS.

Note: HP strongly discourages the use of DHCP on the vCAS.

The web UI forces the vCAS user to assign a static IP address and change the hp-admin password. A vCAS user must manually configure DHCP for use on the vCAS.

A vCAS user can verify that DHCP is disabled by inspecting the file "/etc/network/interfaces" and ensuring that the "iface" line for device "eth0" is set for a static IP.

Example of a static IP configuration:

# The primary network interface
auto eth0
iface eth0 inet static

HISTORY Version:1 (rev.1) - 30 September 2014 Initial release

Third Party Security Patches: Third party security patches that are to be installed on systems running HP 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 HP Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hp.com.

Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com

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Security Bulletin Archive: A list of recently released Security Bulletins is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/

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 = HP General Software HF = HP Hardware and Firmware MP = MPE/iX MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PI = Printing and Imaging PV = ProCurve ST = Storage Software TU = Tru64 UNIX UX = HP-UX

Copyright 2014 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company 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 Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners.

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