ASA-2021-021 (RHSA-2021-0856)
kernel security and bug fix update (RHSA-2021-0856)

Original Release Date: March 31, 2021
Last Revised: December 11, 2021
Number: ASA-2021-021
Overall Severity Classification: High
Advisory Version: 3.0
Advisory Status: Final

1. Overview:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):
* kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)
* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
* kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)
* kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)
* kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)
* kernel: performance counters race condition use-after-free (CVE-2020-14351)
* kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)
* kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)
* kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)
* kernel: increase slab leak leads to DoS (CVE-2021-20265)

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.x through 8.1.x For 7.1.x through 8.1.1, upgrade to 8.1.2 and install Linux Security Update 6 or later.

For 8.1.2 and later, install Linux Security Update Patch 6 or later.

Avaya Aura® R7 is EOMS and this issue is addressed in a supported version, refer to Avaya Aura® Release 7 End of Manufacture Support.

8.1.x Linux Security Updates information

Avaya Breeze™ Platform 3.3.0.0 through 3.8.0.x Upgrade to 3.8.1.0 or later.  
Avaya CMS R19.0.x, R19.1.x Upgrade to R19.2.0 or later.  
Avaya Aura® Communication Manager 7.1.x, 8.0.x, 8.1.x For 8.1.x, install Kernel Service Pack 9 or later.

For 7.1.x and 8.0.x, upgrade to the latest version of 8.1.x and install Kernel Service Pack 9 or later.

Avaya Aura® R7 is EOMS and this issue is addressed in a supported version, refer to Avaya Aura® Release 7 End of Manufacture Support.

8.1.x Kernel Service Pack

Avaya Aura® Device Services 8.0.0.0 through 8.1.4.x Upgrade to 8.1.5.0 or later.  
Avaya IP Office 11.1 through 11.1 FP1 Upgrade to 11.1 FP2 or later.  
Avaya Aura® Messaging 7.1.x, 7.2 Upgrade to 7.2 SP1 or later.  
Avaya Session Border Controller for Enterprise 7.2.0.0 through 8.1.2.x Upgrade to 8.1.3.0 or later.  
Avaya Aura® Session Manager 7.1.0.x through 8.1.3.1 For 7.1.x and 8.0.x, upgrade to 8.1.3.2 or later.

For 8.1.x, install Security Service Pack or upgrade to 8.1.3.2 or later.

Avaya Aura® R7 is EOMS and this issue is addressed in a supported version, refer to Avaya Aura® Release 7 End of Manufacture Support.

SM 8.1.x Security Service Pack

Avaya Aura® System Manager 7.1.x through 8.1.3.1 Upgrade to 8.1.3.2 or later. Avaya Aura® R7 is EOMS and this issue is addressed in a supported version, refer to Avaya Aura® Release 7 End of Manufacture Support.
Avaya Aura® Utility Services 7.1.x No further releases are planned. Avaya Aura® R7 is EOMS, refer to Avaya Aura® Release 7 End of Manufacture Support.

See recommended actions below.

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-2019-19532
6.8 (Medium) CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2020-0427
5.5 (Medium) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVE-2020-7053
7.8 (High) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2020-14351
7.0 (High) CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2020-25211
6.7 (Medium) CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE-2020-25645
7.5 (High) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE-2020-25656
4.1 (Medium) CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
CVE-2020-25705
7.4 (High) CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVE-2020-28374
8.1 (High) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVE-2020-29661
7.0 (High) CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-20265
5.1 (Medium) CVSS:3.1/AV:L/AC:H/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 - March 31, 2021 - Initial Statement issued.
V 2.0 - October 14, 2021 - Updated versions and resolution for AES, Breeze, CM, AADS, AAM, SBCE, SM and SMGR.
V 3.0 - December 11, 2021 - Updated versions and resolution for IP Office and set 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 securityalerts@avaya.com.

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