The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address.
Two denial of service flaws were found in the way the dhcpd daemon handled certain incomplete request packets. A remote attacker could use these flaws to crash dhcpd via a specially-crafted request. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the names CVE-2011-2748 and CVE-2011-2749 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 Aura® Communication Manager | 5.x, 6.0.x | Low | Communication Manager 5.x and earlier: Upgrade to Communication Manager 5.2.1 and install Security Service Pack 3. Communication Manager 6.0.x: Upgrade to Communication Manager 6.2 or later. |
Avaya Communication Server 1000:
|
6.0, 7.x | Low | See recommended actions and mitigating factors table below. This advisory will not be addressed as no further releases are planned. |
| Avaya IP Office Application Server | 6.1, 7.0, 8.0, 8.1 | Low | Upgrade to IP Office Application Server 9.0 or later. |
| Avaya IQ | 5.2 thru 5.2.5 | Low | Upgrade to 5.2.6 and install Patch 2 or later. |
| Avaya Message Networking | 5.2, 5.2.1, 5.2.2, 5.2.3 | Low | Upgrade to Message Networking 5.2.4 or later. |
| Avaya Aura® Messaging | 6.0.x, 6.1.x | Low | Upgrade to Messaging 6.2 or later. |
| Avaya Messaging Storage Server | 4.0, 5.2 thru 5.2.9 | Low | Upgrade to Messaging Storage Server 5.2.10 or later. |
| Avaya Aura® SIP Enablement Services | 4.0.x through 5.2.x | Low | See recommended actions below. This advisory will not be addressed as no further releases are planned. |
| Avaya Aura® System Manager | 5.2.x, 6.0.x, 6.1.x, 6.2.x | Low | Upgrade to System Manager 6.3 or later. |
| Avaya Aura® System Platform | 1.1, 6.0 thru 6.0.3.5.3 | Low | Upgrade to System Platform 6.0.3 with patch 6.0.3.6.3 or later. |
| Avaya Aura® Communication Manager Utility Services | 6.0, 6.1, 6.2 without Supplement 4 | Low | Install Supplement 4 or later as detailed in PCN1874S |
Recommended Actions for System Products:
Avaya strongly recommends that customers follow
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 customers should not modify the System Product
operating system or application 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-2011-2748 CVE-2011-2749 |
These are a low for all products as dhcpd is disabled by default. |
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 4.x/5.x | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the AES application. |
| CVLAN | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the CVLAN application. |
| Avaya Integrated Management Suite (IMS) | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the IMS application. |
| Avaya Aura® Presence Services | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the PS application. |
| Avaya Aura® System Manager 1.0 | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the SMGR application. |
| Voice Portal | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the Voice Portal application. |
Recommended Actions for Software-Only Products:
In the event that the affected package is installed, Avaya recommends that customers follow 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 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.
V 1.0 - September 13, 2011 - Initial Statement issued.
V 2.0 - December 20, 2011 - Changed MN affected versions and actions.
V 3.0 - March 12, 2012 - Changed IP Office Application Server and MSS affected versions and MSS actions.
V 4.0 - March 30, 2012 - Changed CM affected versions and actions.
V 5.0 - April 9, 2012 - Changed SP affected versions and actions.
V 6.0 - October 2, 2012 - Changed IPOAS, Messaging and SMGR affected versions and Messaging actions.
V 7.0 - December 13, 2012 - Updated SMGR actions.
V 8.0 - December 21, 2012 - Updated CMUS affected versions and actions.
V 9.0 - June 6, 2013 - Updated CS1000 affected versions and actions.
V 10.0 - October 18, 2013 - Updated IPOAS actions.
V 11.0 - June 25, 2015 - Updated IQ 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 [email protected].
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