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).
It was found that kadmind's kpasswd service did not perform any validation on incoming network packets, causing it to reply to all requests. A remote attacker could use this flaw to send spoofed packets to a kpasswd service that appear to come from kadmind on a different server, causing the services to keep replying packets to each other, consuming network bandwidth and CPU. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2002-2443 to this issue.
More information about this vulnerability can be found in the security advisory issued by Red Hat:
| Product: | Affected Version(s): | Risk Level: | Actions: |
|---|---|---|---|
| Avaya Aura® Application Enablement Services | 5.x thru 6.3 | Low | Upgrade to 6.3.1 or later. |
Avaya Aura® Application Server 5300:
|
2.x, 3.x | None | See Mitigating Factors table below. |
| Avaya IQ | 5.2 thru 5.2.5 | Low | Upgrade to 5.2.6 and install Patch 2 or later. |
| Avaya CMS | R17.x | None | See Mitigating Factors table below. |
| Avaya Aura® Communication Manager | 6.x | None | See Mitigating Factors table below. |
Avaya Communication Server 1000:
|
6.x, 7.x | Low | See recommended actions and Mitigating Factors table below. This advisory will not be addressed as no further releases are planned. |
| Avaya Aura® Conferencing | 7.x | None | See Mitigating Factors table below. |
| Avaya Aura® Conferencing Standard Edition | 6.x | None | See Mitigating Factors table below. |
| Avaya Aura® Experience Portal | 6.x | Low | Upgrade to 7.0 or later. |
| Avaya IP Office Server Edition | 8.x | None | See Mitigating Factors table below. |
| Avaya IP Office Application Server | 8.x | None | See Mitigating Factors table below. |
| Avaya Meeting Exchange | 6.x | None | See Mitigating Factors table below. |
| Avaya Aura® Messaging | 6.x | None | See Mitigating Factors table below. |
| Avaya one-X® Client Enablement Services | 6.1.x, 6.2 | Low | Upgrade to 6.2 SP1 or later. |
| Avaya Aura® Presence Services | 6.0.x, 6.1 | Low | Upgrade to 6.1.2 or later. Only the krb5-libs package is installed. |
| Avaya Proactive Contact | 5.0.x, 5.1 | Low | Upgrade to 5.1.1 or later. |
| Avaya Aura® Session Manager | 5.x, 6.x | None | See Mitigating Factors table below. |
| Avaya Aura® System Manager | 5.x, 6.x | Low | Upgrade to 6.3.4 or later. |
| Avaya Aura® System Platform | 6.x | None | See Mitigating Factors table below. |
| Avaya Aura® Communication Manager Utility Services | 6.x | None | See Mitigating Factors table below. |
| Avaya Voice Portal | 5.x | None | See Mitigating Factors table below. |
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.
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-2002-2443 |
The risk is Low for Application Enablement Services, Communication Server
1000, IQ, Experience Portal, one-X CES, Presence Services, Proactive Contact
and System Manager because the kerberos is not used or configured by
default. The risk is None for all other products as only the krb5-libs and/or krb5-devel packages are installed 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 | 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.
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 - July 17, 2013 - Initial Statement issued.
V 2.0 - January 8, 2014 - Changed AES and SMGR affected versions and AES, SMGR and EP actions.
V 3.0 - August 5, 2014 - Changed one-X CES, PC and PS affected versions and actions.
V 4.0 - July 8, 2015 - Chnaged IQ affected version 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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