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HPSBGN03547 rev.3 - HPE Helion Eucalyptus Node Controller and other Helion Eucalyptus Components using glibc, Remote Arbitrary Code Execution

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c04989404

Version: 3

HPSBGN03547 rev.3 - HPE Helion Eucalyptus Node Controller and other Helion Eucalyptus Components using glibc, Remote Arbitrary Code Execution
NOTICE: The information in this Security Bulletin should be acted upon as soon as possible.

Release Date: 2016-02-18

Last Updated: 2016-04-29


Potential Security Impact: Remote Arbitrary Code Execution, Denial of Service (DoS)

Source: Hewlett Packard Enterprise, HPE Product Security Response Team

VULNERABILITY SUMMARY

A security vulnerability in glibc has been addressed with HPE Helion Eucalyptus Node Controller and other Helion Eucalyptus components. The vulnerability could be exploited remotely resulting in arbitrary execution of code.

Notes:

  • A stack-based buffer overflow vulnerability has been announced in the glibc library that affects all versions of glibc since 2.9. Glibc packages shipped with Red Hat and CentOS 6 are affected.To exploit the vulnerability, a remote attacker can create a specially crafted DNS response and potentially execute an arbitrary code on the host with the permissions of a user running glibc library.

  • Helion Eucalyptus Node Controller (NC) components are confirmed to be affected by the vulnerability. Other Helion Eucalyptus components and pre-bundled service EMIs do not directly expose the vulnerability, but because glibc is a commonly used library on Linux, the exact exposure is hard to determine. Any software performing domain name resolution is potentially vulnerable.

References:
  • PSRT110035
  • CVE-2015-7547

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

  • HPE Helion Eucalyptus Node Controller 4.2.2 and earlier
  • HPE Helion Eucalyptus Service components EMIs for Load Balancing and Imaging services package "eucalyptus-service-image-1.48-0.87.99" and earlier

BACKGROUND

CVSS 2.0 Base Metrics
Reference
Base Vector
Base Score
CVE-2015-7547
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
6.8
Information on CVSS is documented in HP Customer Notice: HPSN-2008-002

RESOLUTION

HPE has made the following software updates and workaround information available to resolve the vulnerability with glibc for HPE Helion Eucalyptus.

  • All hosts running HPE Helion Eucalyptus services should be upgraded to the latest glibc. Updated glibc packages are available for RHEL and CentOS:

    https://access.redhat.com/articles/2161461 Non-HPE site

    RHEL Note: After following the guidelines for RHEL, a reboot is the safest and recommended way to ensure that updates takes effect for all services.

  • New Helion Eucalyptus Service EMI eucalyptus-service-image-1.57-0.93.110.el6 with updated glibc packages is available in the Eucalyptus software repositories at:

    http://downloads.eucalyptus.com/software/eucalyptus/4.2/ Non-HPE site

If installing the updated service EMI is not possible, the following workaround is available to update the instances launched from eucalyptus-service-image-1.48-0.87.99 and earlier to the latest glibc packages.

Workaround:

As a cloud administrator:

  1. create an update-glibc script with the following content:

    #! /bin/bash
    yum update -y glibc

  2. set the following cloud properties to use that script on instance start:

    euctl services.imaging.worker.init_script=@update-glibc
    euctl services.loadbalancing.worker.init_script=@update-glibc

This script will be automatically executed for each of the new instances started from the service image. For instances that are already running, the cloud administrator will need to terminate them and start again for the script to take effect. More specifically, for the Load Balancing service, the cloud admin needs to find all instances running under the "(eucalyptus)loadbalancing" account:

# euare-accountlist | grep loadbalancing
(eucalyptus)loadbalancing <accnt_id>

# euca-describe-instances verbose | grep <accnt_id>

And terminate them using euca-terminate-instances. New updated instances will be started automatically after that.

For the Imaging Service, the imaging worker needs to be terminated and started again:

# esi-manage-stack -a delete imaging
# esi-manage-stack -a create imaging

HISTORY
Version:1 (rev.1) - 17 February 2016 Initial release Version:2 (rev.2) - 28 April 2016 Update Helion Eucalyptus Service EMI eucalyptus-service-image-1.57-0.93.110.el6 now available
Version:2 (rev.2) - 28 April 2016 Update Helion Eucalyptus Service EMI eucalyptus-service-image-1.57-0.93.110.el6 now available
Version:3 (rev.3) - 29 April 2016 Changed impacted version from 4.2.1 to 4.2.2 and earlier

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 with any HPE supported product, send Email to: security-alert@hpe.com

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Security Bulletin Archive: A list of recently released Security Bulletins is available here: http://www.hpe.com/support/Security_Bulletin_Archive

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
MU = Multi-Platform Software
NS = NonStop Servers
OV = OpenVMS
PV = ProCurve
ST = Storage Software
UX = HP-UX

©Copyright 2016 Hewlett Packard Enterprise Company, L.P.
Hewlett Packard Enterprise 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 HPE nor 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 Company and the names of Hewlett Packard Enterprise products referenced herein are trademarks of Hewlett Packard Enterprise 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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