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[FD] ESA-2017-161: EMC Isilon OneFS NFS Export Security Setting Fallback Vulnerability
- To: "fulldisclosure@xxxxxxxxxxxx" <fulldisclosure@xxxxxxxxxxxx>
- Subject: [FD] ESA-2017-161: EMC Isilon OneFS NFS Export Security Setting Fallback Vulnerability
- From: EMC Product Security Response Center <Security_Alert@xxxxxxx>
- Date: Mon, 18 Dec 2017 19:07:08 +0000
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ESA-2017-161: EMC Isilon OneFS NFS Export Security Setting Fallback
Vulnerability
EMC Identifier: ESA-2017-161
CVE Identifier: CVE-2017-14387
Severity Rating: CVSS v3 Base Score: 4.8 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)
Affected products:
* EMC Isilon OneFS 8.1.0.0
* EMC Isilon OneFS 8.0.1.0 -- 8.0.1.1
* EMC Isilon OneFS 8.0.0.0 - 8.0.0.4
Summary:
EMC Isilon OneFS requires a security update to address an issue that may
potentially allow NFS clients to access certain NFS exports using a weaker
authentication flavor when default NFS export settings are modified.
Details:
OneFS NFS service maintains default NFS export settings (including NFS export
security flavor for authentication) that can be leveraged by current and future
NFS exports. OneFS NFS service contained a flaw that did not properly propagate
changes made to the default security flavor to all new and existing NFS exports
that are configured to use default NFS export settings and that are mounted
after those changes are made. This flaw may potentially allow NFS clients to
access affected NFS exports using the default and potentially weaker security
flavor even if a more secure one was selected to be used by the OneFS
administrator.
Resolution:
The following versions of EMC Isilon OneFS resolve this vulnerability:
* EMC Isilon OneFS 8.1.0.1
* EMC Isilon OneFS 8.0.1.2
* EMC Isilon OneFS 8.0.0.5
EMC recommends that all customers upgrade to a version containing the
resolution at the earliest opportunity.
If you cannot upgrade at this time, you can perform the workaround below.
Workaround:
After you create or modify an export, and before you mount that export,
manually refresh the exports by running either of the following commands:
isi nfs exports reload
or
/usr/likewise/bin/lwsm refresh nfs
Link to remedies:
Registered EMC Online Support customers can download OneFS installation files
from the Downloads for Isilon OneFS page of the EMC Online Support site at
https://support.emc.com/downloads/15209_Isilon-OneFS.
If you have any questions, please contact EMC Support.
[The following is standard text included in all security advisories. Please do
not change or delete.]
Read and use the information in this EMC Security Advisory to assist in
avoiding any situation that might arise from the problems described herein. If
you have any questions regarding this product alert, contact EMC Software
Technical Support at 1-877-534-2867.
For an explanation of Severity Ratings, refer to EMC Knowledgebase solution
emc218831. EMC recommends all customers take into account both the base score
and any relevant temporal and environmental scores which may impact the
potential severity associated with particular security vulnerability.
EMC Corporation distributes EMC Security Advisories, in order to bring to the
attention of users of the affected EMC products, important security
information. EMC recommends that all users determine the applicability of this
information to their individual situations and take appropriate action. The
information set forth herein is provided "as is" without warranty of any kind.
EMC disclaims all warranties, either express or implied, including the
warranties of merchantability, fitness for a particular purpose, title and
non-infringement. In no event, shall EMC or its suppliers, be liable for any
damages whatsoever including direct, indirect, incidental, consequential, loss
of business profits or special damages, even if EMC or its suppliers have been
advised of the possibility of such damages. Some states do not allow the
exclusion or limitation of liability for consequential or incidental damages,
so the foregoing limitation may not apply.
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