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-----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). 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