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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
SUPPORT COMMUNICATION - SECURITY BULLETIN
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)
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 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 address 172.27.1.68 netmask 255.255.255.0 gateway 172.27.1.1
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.
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