The kernel packages contain the Linux kernel, the core of any Linux operating system.
Two flaws were found in the way the Linux kernel's networking implementation handled UDP packets with incorrect checksum values. A remote attacker could potentially use these flaws to trigger an infinite loop in the kernel, resulting in a denial of service on the system, or cause a denial of service in applications using the edge triggered epoll functionality. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2015-5364 and CVE-2015-5366 to these issues.
More information about these vulnerabilities can be found in the security advisory issued by Red Hat:
| Product: | Affected Version(s): | Risk Level: | Actions: |
|---|---|---|---|
| Avaya CMS | R17 through R17 R4, R18, R18.0.0.1 | Low | For R17, upgrade to R17 R5 or later. For R18 and R18.0.0.1, upgrade to R18.0.0.2 or later. |
| Avaya Breeze™ Platform | 2.x, 3.x including 3.1 | Low | Upgrade to Engagement Development Platform 3.1.1 or later. |
| Avaya Aura® Communication Manager | 7.0 | Low | Install 7.0 KSP1 or later. |
| Avaya Aura® Conferencing | 8.0 through 8.0 SP4 | Medium | Upgrade to 8.0 SP5 or later. |
| Avaya Aura® Experience Portal | 6.x, 7.0, 7.0.2 | Low | For 7.0.1 and earlier, upgrade to 7.0.2 and Avaya Linux for 7.0.2, and install the latest Security Updates. For 7.0.2, install the latest Security Updates. |
| Avaya IP Office Server Edition | 8.1 through 10.0 SP1 | Low | Upgrade to 10.0 SP2 or later. |
| Avaya IP Office Application Server | 8.1 through 10.0 SP1 | Low | Upgrade to 10.0 SP2 or later. |
| Avaya one-X® Client Enablement Services | 6.2 through 6.2 SP3 | Low | Upgrade to 6.2 SP4 or later. |
| Avaya Session Border Controller for Enterprise | 6.3 through 6.3.3, 7.0 | Low | For 6.3.x, upgrade to 6.3.4 or later. For 7.x, upgrade to 7.0.1 or later. |
| Avaya Aura® Session Manager | 6.3 through 6.3.15, 7.0 | Low | For 6.3.x, upgrade to 6.3.16 or later. For 7.0, upgrade to 7.0.0.1 or later. |
| Avaya Aura® Application Enablement Services | 7.0 | Low | Install 7.0 Security Update Patch 1 or later. |
| Avaya Aura® System Manager | 7.0 | Low | Upgrade to 7.0 SP1 or later. |
| Avaya Aura® Utility Services | 7.0 | Low | Upgrade to 7.0.0.1.0.12 or later. |
Recommended Actions for System 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.
When determining risk, Avaya takes into account many factors as outlined by Avaya's Security Vulnerability Classification Policy. The following table describes factors that mitigate the risk of specific vulnerabilities for affected Avaya products:
| Vulnerability | Mitigating Factors |
|---|---|
|
CVE-2015-5364 CVE-2015-5366 |
This is rated a Medium risk for Conferencing because of the possibility of DOS and our systems use polling. These are rated a Low risk for remaining products because a UDP flood seems unlikely in an enterprise network. Additionally, none of our important applications use edge trigger epoll() functions with UDP packets. |
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 often do not impact the software-only product directly but may threaten the integrity of the underlying platform.
In the case of this advisory Avaya software-only products are not affected by the vulnerability directly but the underlying Linux platform may be. Customers should determine on which Linux operating system the product was installed and then follow that vendor's guidance.
| Product: | Actions: |
|---|---|
| Avaya Aura® Experience Portal | Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the EP application. |
Recommended Actions for Software-Only Products:
In the event that the affected package is installed, Avaya recommends following recommended actions supplied by Red Hat regarding their Enterprise Linux.
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.
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.
V 1.0 - September 8, 2015 - Initial Statement issued.
V 2.0 - February 2, 2016 -Updated affected versions and actions for CMS, One-X CES, EP, SMGR, SM and US. Also, added AES, SMGR and US as affected products.
V 3.0 - February 12, 2016 -Updated affected versions and actions for ASBCE, AES, Breeze and Conferencing and updated affected versions for US and updated actions for EP.
V 4.0 - August 8, 2016 - Updated affected versions and actions for CMS and Communication Manager.
V 5.0 - January 11, 2017 - Updated affected versions and actions for IPOSE and IPOAS 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.
Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries.
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