kernel security and bug fix update (RHSA-2013-1173)

Original Release Date: September 11, 2013
Last Revised: November 15, 2014
Number: ASA-2013-429
Risk Level: Medium
Advisory Version: 3.0
Advisory Status: Final

1. Overview:

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

This update fixes the following security issues:

A flaw was found in the way the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation handled duplicate cookies. If a local user queried SCTP connection information at the same time a remote attacker has initialized a crafted SCTP connection to the system, it could trigger a NULL pointer dereference, causing the system to crash. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-2206 to this issue.

It was found that the fix for CVE-2012-3552 released via RHSA-2012:1304 introduced an invalid free flaw in the Linux kernel's TCP/IP protocol suite implementation. A local, unprivileged user could use this flaw to corrupt kernel memory via crafted sendmsg() calls, allowing them to cause a denial of service or, potentially, escalate their privileges on the system. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-2224 to this issue.

A flaw was found in the Linux kernel's Performance Events implementation. On systems with certain Intel processors, a local, unprivileged user could use this flaw to cause a denial of service by leveraging the perf subsystem to write into the reserved bits of the OFFCORE_RSP_0 and OFFCORE_RSP_1 model-specific registers. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-2146 to this issue.

An invalid pointer dereference flaw was found in the Linux kernel's TCP/IP protocol suite implementation. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system by using sendmsg() with an IPv6 socket connected to an IPv4 destination. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-2232 to this issue.

Information leak flaws in the Linux kernel's Bluetooth implementation could allow a local, unprivileged user to leak kernel memory to user-space. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2012-6544 to this issue.

An information leak flaw in the Linux kernel could allow a privileged, local user to leak kernel memory to user-space. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2013-2237 to this issue.

More information about these vulnerabilities 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:

Product: Affected Version(s): Risk Level: Actions:
Avaya CMS R17 thru R17 R2 Medium Upgrade to R17 R3 or later.
Avaya Aura® Experience Portal 6.x Medium Upgrade to 7.0 and Avaya Enterprise Linux for 7.0 or later.
Avaya IP Office Server Edition 8.1 thru 9.0 SP2 Medium Upgrade to 9.0 SP3 or later.
Avaya one-X® Client Enablement Services 6.2 Medium Upgrade to 6.2 SP1 or later.
Avaya Aura® Session Manager 6.3 thru 6.3.7 Medium Upgrade to 6.3.8 or later.

Recommended Actions for System Products:
Avaya strongly recommends following the 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.

Mitigating Factors:

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-2013-2237
This is a low risk for all products as no critical information can be leaked.
CVE-2013-2232
CVE-2013-2224
CVE-2013-2146
These are a Medium risk for all products due to the potential to crash the system, cause a denial of service or escalate privileges.
CVE-2013-2206 There is no risk for all products as SCTP is not used or supported by default.
CVE-2012-6544 There is no risk for all products as Bluetooth is not used or supported by default.

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 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® Application Enablement Services Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the AES application.
CVLAN Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the CVLAN application.
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.
Avaya Integrated Management Suite (IMS) Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the IMS application.
Avaya Aura® Presence Services Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the PS application.
Avaya Secure Access Link Gateway Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the SAL Gateway application.
Avaya Voice Portal Depending on the Operating System installed, the affected package may be installed on the underlying Operating System supporting the VP application.

Recommended Actions for Software-Only Products:
In the event that the affected package is installed, Avaya recommends following the recommended actions supplied by Red Hat regarding their Enterprise Linux.

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 AND IS PROVIDED "AS IS". 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 11, 2013 - Initial Statement issued.
V 2.0 - January 10, 2014 - Changed EP actions.
V 3.0 - November 15, 2014 - Changed CMS, IP Office, one-X CES and SM affected versions and actions, and set advisory status to final.

Send information regarding any discovered security problems with Avaya products to either the contact noted in the product's documentation or securityalerts@avaya.com.

Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries.

© 2013 Avaya Inc. All Rights Reserved. All trademarks identifying Avaya products by the ® or ™ are registered trademarks or trademarks, respectively, of Avaya Inc. All other trademarks are the property of their respective owners.