Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC).
A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC processed principal names that were not null terminated, when the KDC was configured to use an LDAP back end. A remote attacker could use this flaw to crash the KDC via a specially-crafted request. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-0282 to this issue.
A denial of service flaw was found in the way the MIT Kerberos KDC processed certain principal names when the KDC was configured to use an LDAP back end. A remote attacker could use this flaw to cause the KDC to hang via a specially-crafted request. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-0281 to this issue.
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® Application Enablement Services | 5.2.x, 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
Avaya Aura® Application Server 5300:
|
2.0 | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® Communication Manager | 6.0 and later | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
Avaya Communication Server 1000:
|
6.0, 7.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® Conferencing Standard Edition | 6.0 | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya IP Office Application Server | 6.1, 7.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya IQ | 5.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® Presence Services | 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Proactive Contact | 5.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® Session Manager | 1.1, 5.2, 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® System Manager | 5.2, 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® System Platform | 1.1, 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Aura® Communication Manager Utility Services | 6.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
| Avaya Voice Portal | 5.x | None | Packages detailed in the Mitigating Factors section are targeted to be updated in a future software release. |
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-2011-0281 CVE-2011-0282 |
There is no product risk as the krb5-server package, which installs KDC, is not installed by default. The products have krb5-libs, krb5-devel and/or krb5-workstation packages installed due to a dependency of other packages. |
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 - April 27, 2011 - Initial Statement issued.
V 2.0 - December 19, 2011 - Changed advisory risk level to None and 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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