bind security update (RHSA-2020-2383)

Original Release Date: September 25, 2020
Last Revised: May 7, 2021
Number: ASA-2020-084
Overall Severity Classification: High
Advisory Version: 2.0
Advisory Status: Final

1. Overview:

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols. BIND includes a DNS server (named); a resolver library (routines for applications to use when interfacing with DNS); and tools for verifying that the DNS server is operating correctly.

Security Fix(es):

* bind: BIND does not sufficiently limit the number of fetches performed when processing referrals (CVE-2020-8616)

* bind: A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c (CVE-2020-8617)

More information can be found in the security advisory issued by Red Hat:

2. Avaya System Products using a modified version of RHEL6 with affected packages installed:

For assessment and severity classification details refer to Section 3 of Avaya's Product Vulnerability Response Policy.
The "Resolution" column will be updated as fixes are made available. Please reference the "Information" column for any additional information regarding the affected product.

Product: Version(s): Resolution: Information:
Avaya Aura® Application Enablement Services 7.1 through 7.1.3, 8.0 through 8.1.2 For 7.1.3.x, install 7.1.3.x LSU9 or later or upgrade to 8.1.2 and install 8.1.2Plus LSU2 or later.
Avaya Aura® R7 is EoMS and it is recommended to upgrade to a supported version. Refer to Avaya Aura® Release 7 End of Manufacture Support.

7.1.x Linux Security Updates information
8.0.x Linux Security Updates information
8.1.x Linux Security Updates information.

The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.

Avaya Aura® Application Server 5300:
  • SIP Core
3.0 SP11 through 3.0 SP15.4 Upgrade to 3.0 SP15.4.1 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Breeze™ Platform 3.0.0.0 through 3.2.x.x Upgrade to 3.8.0.0 or later. The risk is mitigated because named is restricted to the internal local host interface with no external access.
Avaya CMS R18.x Upgrade to R18.1.0.4 or later. R18 has reached End of Manufacturer Support for Software. Refer to the End of Sale Notice.
Avaya Aura® Communication Manager 7.0.x For 7.1.3.x, install 7.1.x SSP10 or upgrade to the latest version of 8.1.x and install SSP5 or later. Avaya Aura® R7 is EoMS and it is recommended to upgrade to a supported version. Refer to Avaya Aura® Release 7 End of Manufacture Support.

7.1.x Security Service Pack
8.1.x Security Service Pack

The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.

Avaya Aura® Conferencing 8.0 SP19 Upgrade to 8.0 SP19.1 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Aura® Experience Portal 7.x Install latest Avaya Linux Updates for Experience Portal. 7.2.x Security Updates
7.1.x Security Updates
7.0.x Security Updates

The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya IP Office 10.x, 11.0.x Upgrade to 11.1.1.0 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Meeting Exchange 6.2 SP3 through 6.2 SP9 Upgrade to 6.2 SP10 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Aura® Messaging 7.0.x Upgrade to 7.1 SP3 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya one-X® Client Enablement Services 6.2 through 6.2.8 Upgrade to 6.2 SP9 or later. 6.2 SP9 and later versions are software-only.

Refer to:

  1. PSN005490u
  2. 6.2 SP9 Release Notes
  3. Section 3 Avaya Software-Only Products below

The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.

Avaya Proactive Contact 5.2.x Will not fix. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Session Border Controller for Enterprise 7.0.x, 7.1.x For 7.x, upgrade to 7.2.2.6 or later or upgrade to 8.1.1.0 or later. The risk is mitigated because bind, which provides named, is not installed. Only bind-libs and bind-utils are installed.
Avaya Aura® Session Manager 7.0.x For 7.1.x, upgrade to 7.1.3.7 or later.
For 8.1.x, upgrade to 8.1.3.0 or later.
Avaya Aura® R7 is EoMS and it is recommended to upgrade to a supported version. Refer to Avaya Aura® Release 7 End of Manufacture Support.

The risk is mitigated because named is restricted to the internal local host interface with no external access.

Avaya Aura® System Manager 7.0.x For 7.1.x, upgrade to 7.1.3.8 or later.
For 8.1.x, upgrade to 8.1.3.0 or later.
Avaya Aura® R7 is EoMS and it is recommended to upgrade to a supported version. Refer to Avaya Aura® Release 7 End of Manufacture Support.

The risk is mitigated because named is not running by default.

Avaya Aura® Utility Services 7.0.x Upgrade to 7.1.3.8 or later. Avaya Aura® R7 is EoMS. Refer to Avaya Aura® Release 7 End of Manufacture Support.

The risk is mitigated because named is not running by default.

Recommended Actions for Products:
Avaya strongly recommends following networking and security best practices by implementing firewalls, ACLs, physical security or other appropriate access restrictions. Though Avaya believes such restrictions should always be in place, risk to Avaya products and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as an Avaya provided product update or the recommended Avaya action is applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period, but the System Product operating system or application should not be modified unless the change is approved by Avaya. Making changes that are not approved may void the Avaya product service contract.

CVSS Scoring and Metrics:

Avaya uses the Common Vulnerability Scoring System (CVSS) base score and metrics as reported by the vendor for the affected component(s) or by the National Institute of Standards and Technology in the National Vulnerability Database. In some cases, such as where CVSS information is not available from the vendor or NIST, Avaya will calculate the CVSS base score and metrics. Customers are encouraged to calculate the Temporal and Environmental CVSS scores to determine how the vulnerability could affect their specific implementation or environment. For more information on CVSS and how the score is calculated, see Common Vulnerability Scoring System: Specification Document.

Vulnerability CVSSv3 Base Score CVSSv3 Metrics
CVE-2020-8616
8.6 (High) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVE-2020-8617
7.5 (High) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

3. Avaya Software-Only Products:

Avaya software-only products operate on general-purpose operating systems. Occasionally, vulnerabilities may be discovered in the underlying operating system or applications that come with the operating system. These vulnerabilities may not impact the software-only product directly but may threaten the integrity of the underlying platform.

Product: Actions:
Avaya Aura® Application Enablement Services If an affected package is installed, Avaya recommends following the actions supplied by Red Hat.
Avaya Aura® Experience Portal If an affected package is installed, Avaya recommends following the actions supplied by Red Hat.
one-X Client Enablement Services If an affected package is installed, Avaya recommends following the actions supplied by Red Hat.

4. Additional Information:

Additional information may also be available via the Avaya support website and through your Avaya account representative. Please contact your Avaya product support representative, or dial 1-800-242-2121, with any questions.

5. Disclaimer:

ALL INFORMATION IS BELIEVED TO BE CORRECT AT THE TIME OF PUBLICATION, IS PROVIDED "AS IS", AND IS APPLICABLE ONLY TO PRODUCT VERSIONS ELIGIBLE FOR MANUFACTURER SUPPORT IN ACCORDANCE WITH AVAYA PRODUCT LIFE CYCLE POLICY. AVAYA INC., ON BEHALF ITSELF AND ITS SUBSIDIARIES AND AFFILIATES (HEREINAFTER COLLECTIVELY REFERRED TO AS "AVAYA"), DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND FURTHERMORE, AVAYA MAKES NO REPRESENTATIONS OR WARRANTIES THAT THE STEPS RECOMMENDED WILL ELIMINATE SECURITY OR VIRUS THREATS TO CUSTOMERS' SYSTEMS. IN NO EVENT SHALL AVAYA BE LIABLE FOR ANY DAMAGES WHATSOEVER ARISING OUT OF OR IN CONNECTION WITH THE INFORMATION OR RECOMMENDED ACTIONS PROVIDED HEREIN, INCLUDING DIRECT, INDIRECT, INCIDENTAL, STATUTORY, CONSEQUENTIAL DAMAGES, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF AVAYA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

THE INFORMATION PROVIDED HERE DOES NOT AFFECT THE SUPPORT AGREEMENTS IN PLACE FOR AVAYA PRODUCTS. SUPPORT FOR AVAYA PRODUCTS CONTINUES TO BE EXECUTED AS PER EXISTING AGREEMENTS WITH AVAYA.

6. Revision History:

V 1.0 - September 25, 2020 - Initial Statement issued.
V 2.0 - May 7, 2021 - Updated all products except for CMS and set the advisory status to Final.

Avaya customers or Business Partners should report any security issues found with Avaya products via the standard support process.
Independent security researchers can contact Avaya at [email protected].

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