-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.2207
          ESA-2016-065: EMC Avamar Data Store and Avamar Virtual
                     Edition Multiple Vulnerabilities
                             20 September 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          EMC Avamar Data Store (ADS)
                  EMC Avamar Virtual Edition (AVE)
Publisher:        EMC
Operating System: Network Appliance
                  Virtualisation
Impact/Access:    Access Privileged Data -- Remote/Unauthenticated
                  Root Compromise        -- Existing Account      
Resolution:       Patch/Upgrade
CVE Names:        CVE-2016-0921 CVE-2016-0920 CVE-2016-0905
                  CVE-2016-0904 CVE-2016-0903 

- --------------------------BEGIN INCLUDED TEXT--------------------

ESA-2016-065: EMC Avamar Data Store and Avamar Virtual Edition Multiple 
Vulnerabilities

EMC Identifier: ESA-2016-065
CVE Identifier: CVE-2016-0903, CVE-2016-0904, CVE-2016-0905, CVE-2016-0920, 
CVE-2016-0921

Severity Rating: See below for individual scores for each CVE

Affected products:  
EMC Avamar Data Store (ADS) and Avamar Virtual Edition (AVE) versions prior to 
7.3.0

Summary:  
EMC Avamar Data Store (ADS) and Avamar Virtual Edition (AVE) 7.3 contain fixes 
for multiple vulnerabilities.  These vulnerabilities may expose the Avamar 
clients and servers to potentially be compromised by malicious users.

Details:

The following vulnerabilities were addressed in EMC Avamar 7.3 versions:

1.	Improper client side authentication (CVE-2016-0903)
Certain communications between Avamar client and Avamar Server were using a 
weak authentication scheme. An attacker could impersonate an Avamar client 
agent to restore affected clients backup data from the server. All agent and 
server communications are now authenticated using certificate-based 
authentication. See the Product Security Guide for more details.

CVSSv3 Base Score: 8.1 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

2.	Improper encryption of communication channel (CVE-2016-0904)
The communication between Avamar agent and Avamar server was encrypted using 
static keys.  An attacker with knowledge of the static keys could potentially 
eavesdrop on this communication. Communication is now protected using 
certificates uniquely generated during server installation and client 
registration. See the Product Security Guide for more details.

CVSSv3 Base Score: 7.0 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L)

3.	Privilege escalation via sudo (CVE-2016-0905)
Avamar admin level user is able to gain root privileges on the node using sudo
command without providing root credentials.

CVSSv3 Base Score: 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)


4.	Command Injection in sudo script (CVE-2016-0920)
A certain command accessible via sudo is vulnerable to a command injection when
parsing its parameters. A malicious Avamar user can pass specially crafted 
parameter and execute commands as root.

CVSSv3 Base Score: 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

5.	Privilege escalation due to weak file permissions (CVE-2016-0921)
Weak permissions for certain Avamar directories may allow Avamar admin user to 
replace affected directories and scripts with their own and execute them with 
root privileges. 

CVSSv3 Base Score: 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

Resolution:  
The following EMC Avamar release contains resolutions to all these 
vulnerabilities

Avamar Server Version 7.3.0-233

EMC recommends all customers upgrade at the earliest opportunity. 

Link to remedies:

To upgrade your EMC Avamar system, contact your account representative or EMC 
Remote Proactive Customer Support at https://support.emc.com and refer to this
article number.

Credits:

EMC would like to thank the following individuals for reporting issues 
described in this advisory:
Jakub Mleczko from the security team from Orange Poland (CVE-2016-0903 and 
CVE-2016-0904) 
Jack Baker from Northrop Grumman (CVE-2016-0920)
Geoffrey Janjua from Northrop Grumman (CVE-2016-0921)

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 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.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=2NY/
-----END PGP SIGNATURE-----