Wind River VxWorks® TCP/IP Stack (IPNET) vulnerabilities aka URGENT/11 (July 2019)

Original Release Date: August 20, 2019
Last Revised: October 29, 2019
Number: ASA-2019-210
Overall Severity Classification: Critical
Advisory Version: 2.0
Advisory Status: Final

1. Overview:

VxWorks is a real-time operating system developed as proprietary software by Wind River Systems. Several security vulnerabilities were discovered in the TCP/IP stack (IPnet) component of certain versions of VxWorks. VxWorks is used in Avaya products such as Media Gateways, phones and circuit boards.

Security Fix(es):

* TCP Urgent Pointer = 0 leads to integer underflow (CVE-2019-12255)
* Stack overflow in the parsing of IPv4 packets IP options (CVE-2019-12256)
* Heap overflow in DHCP Offer/ACK parsing inside ipdhcpc (CVE-2019-12257)
* DoS of TCP connection via malformed TCP options (CVE-2019-12258)
* DoS via NULL dereference in IGMP parsing (CVE-2019-12259)
* TCP Urgent Pointer state confusion caused by malformed TCP AO option (CVE-2019-12260)
* TCP Urgent Pointer state confusion during connect() to a remote host (CVE-2019-12261)
* Handling of unsolicited Reverse ARP replies (Logical Flaw) (CVE-2019-12262)
* TCP Urgent Pointer state confusion due to race condition(CVE-2019-12263)
* Logical flaw in IPv4 assignment by the ipdhcpc DHCP client (CVE-2019-12264)
* IGMP Information leak via IGMPv3 specific membership report (CVE-2019-12265)

More information can be found in the security announcement issued by Wind River:

2. Avaya System Products using an affected version of VxWorks:

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:
G430 31.17.0 through 39.27.0,
36.15.30 through 39.27.30
40.10.0 through 40.25.0,
40.10.30 through 40.25.30,
41.9.0 and 41.9.30
For versions up to 39.27.0, upgrade to 39.28.0 or later for 7.1.x.
For 36.15.30 through 39.27.30, upgrade to 39.28.30 or later for 7.1.x.

For 40.x.0 versions, upgrade to 40.31.0 or later for 8.0.x.
For 40.x.30 versions, upgrade to 40.31.30 or later for 8.0.x.

For 41.x.0, upgrade to 41.10.0 for 8.1.x.
For 41.x.30, upgrade to 41.10.30 for 8.1.x.

As of version 36.15.x there are two build versions, .0 and .30. Upgrade version must be the same build version as the installed version.

Refer to PSN020425u for more information.

G450 31.17.0 through 39.27.0,
36.15.30 through 39.27.30
40.10.0 through 40.25.0,
40.10.30 through 40.25.30,
41.9.0 and 41.9.30
For versions up to 39.27.0, upgrade to 39.28.0 or later for 7.1.x.
For 36.15.30 through 39.27.30, upgrade to 39.28.30 or later for 7.1.x.

For 40.x.0 versions, upgrade to 40.31.0 or later for 8.0.x.
For 40.x.30 versions, upgrade to 40.31.30 or later for 8.0.x.

For 41.x.0, upgrade to 41.10.0 for 8.1.x.
For 41.x.30, upgrade to 41.10.30 for 8.1.x.

As of version 36.15.x there are two build versions, .0 and .30. Upgrade version must be the same build version as the installed version.

Refer to PSN020425u for more information.

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 3.0 Scoring and Metrics:

Avaya uses the Common Vulnerability Scoring System version 3 (CVSSv3) 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 CVSSv3 base score and metrics. Customers are encouraged to calculate the Temporal and Environmental CVSSv3 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 v3.0: Specification Document.

Vulnerability CVSSv3 Base Score CVSSv3 Metrics
CVE-2019-12255
9.8 (Critical) CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2019-12256 9.8 (Critical) CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2019-12260 9.8 (Critical) CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2019-12257 8.8 (High) CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2019-12261 8.8 (High) CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVE-2019-12263 8.1 (High) CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2019-12258 7.5 (High) CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE-2019-12262 7.1 (High) CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVE-2019-12264 7.1 (High) CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVE-2019-12259 6.3 (Medium) CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CVE-2019-12265 5.4 (Medium) CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

3. 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.

4. 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.

5. Revision History:

V 1.0 - August 20, 2019 - Initial Statement issued.
V 2.0 - October 29, 2019 - Updated G430 and G450 information 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.

VxWorks® is the registered trademark of Wind River in the U.S. and other countries.

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