bind security and bug fix update (RHSA-2020-1061)

Original Release Date: July 16, 2020
Last Revised: May 4, 2021
Number: ASA-2020-059
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: TCP Pipelining doesn't limit TCP clients on a single connection (CVE-2019-6477)

* bind: An assertion failure if a trust anchor rolls over to an unsupported key algorithm when using managed-keys (CVE-2018-5745)

* bind: Controls for zone transfers may not be properly applied to DLZs if the zones are writable (CVE-2019-6465)

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

2. Avaya System Products using a modified version of RHEL7 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 LSU8 or later.
For 8.x versions prior to 8.1.2, upgrade to 8.1.2 and install 8.1.2Plus LSU1 or later.
For 8.1.2, install 8.1.2Plus LSU1 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 Breeze™ Platform 3.3.0.0 through 3.7.x.x Upgrade to 3.8.0.0 or later.
Avaya CMS R19.0 through 19.1.0.0 Upgrade to R19.1.0.1 or later.
Avaya Aura® Communication Manager 7.1.x, 8.x For 7.1.3.x, install 7.1.x SSP10 or later.
For 8.0.x, upgrade to the latest version of 8.1.x and install SSP4 or later.
For 8.1.x, install 8.1.x SSP4 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® Device Services 8.0 through 8.0.1.x Upgrade to 8.0.2.0 or later.
Avaya IP Office 11.1 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 Aura® Messaging 7.1 through 7.1 SP2 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 Session Border Controller for Enterprise 7.2 through 7.2.2.5, 8.0.x, 8.1.0.0 For 7.x, upgrade to 7.2.2.6 or later.
For 8.x, 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 7.1 through 7.1.3.6, 8.0 through 8.1.2.0 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 7.1 through 7.1.3.7, 8.0 through 8.1.2.0 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 7.1 throguh 7.1.3.7 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-2018-5745
4.9 (Medium) CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVE-2019-6465
3.7 (Low) CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVE-2019-6477
7.5 (High) CVSS:3.0/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 Refer to PSN020361u - Avaya Aura® Software-only RPM updates prior to updating the package. Failure to do so, may result in a system breakage.
Avaya Aura® Communication Manager 8.0 and later Refer to PSN020361u - Avaya Aura® Software-only RPM updates prior to updating the package. Failure to do so, may result in a system breakage.
Oceanalytics Elite If an affected package is installed, Avaya recommends following the actions supplied by Red Hat.
Avaya Aura® Session Manager 8.0 and later Refer to PSN020361u - Avaya Aura® Software-only RPM updates prior to updating the package. Failure to do so, may result in a system breakage.
Avaya Aura® System Manager 8.0 and later Refer to PSN020361u - Avaya Aura® Software-only RPM updates prior to updating the package. Failure to do so, may result in a system breakage.
Avaya Aura® WebLM (Standalone) 8.0 and later Refer to PSN020361u - Avaya Aura® Software-only RPM updates prior to updating the package. Failure to do so, may result in a system breakage.

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 - July 16, 2020 - Initial Statement issued.
V 2.0 - May 4, 2021 - Updated Versions, Resolution and Information for AES, CM, IP Office, Messaging, ASBCE, SM, SMGR, US 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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