Summary
Reference
Document ID: KM02993547 (c04989404)
Version: 3
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:
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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.
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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.
- 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
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Reference
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Base Vector
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Base Score
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|---|---|---|
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CVE-2015-7547
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(AV:N/AC:M/Au:N/C:P/I:P/A:P)
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6.8
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RESOLUTION
HPE has made the following software updates and workaround information available to resolve the vulnerability with glibc for HPE Helion Eucalyptus.
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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
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.
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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:
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:
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create an update-glibc script with the following content:
#! /bin/bash
yum update -y glibc -
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.
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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 = 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
System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions.
"HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement."