vsftpd (Very Secure File Transfer Protocol (FTP) daemon) is a secure FTP server for Linux and Unix-like systems.
The version of vsftpd as shipped in Red Hat Enterprise Linux 4 when used in combination with Pluggable Authentication Modules (PAM) had a memory leak on an invalid authentication attempt. Since vsftpd prior to version 2.0.5 allows any number of invalid attempts on the same connection this memory leak could lead to an eventual DoS. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2008-2375 to this issue.
This update mitigates this security issue by including a backported patch which terminates a session after a given number of failed log in attempts. The default number of attempts is 3 and this can be configured using the "max_login_fails" directive.
More information about these vulnerabilities can be found in the security advisory issued by RedHat Linux:
| Product: | Affected Version(s): | Risk Level: | Actions: |
|---|---|---|---|
| Avaya Communication Manager | CM 5.1 and earlier | Low | Upgrade to CM 5.2 or later. |
| Avaya Intuity AUDIX LX | IALX 2.0, 2.0 SP1 and 2.0 SP2 | Low | This will not be addressed as no further releases are planned. |
| Avaya EMMC | All | Low | This will not be addressed as no further releases are planned. |
| Avaya Message Storage Server | MSS 5.0 and earlier | Low | Upgrade to MSS 5.1 or later. |
| Avaya Message Networking | MN 3.1 | Low | See recommended actions below. This issue will be addressed in accordance with Avaya's Product Security Vulnerability Response Policy |
| Avaya SIP Enablement Services | SES 5.1 and earlier | Low | Upgrade to SES 5.2 or later. |
| Avaya Meeting Exchange | ME 5.0 | Low | See recommended actions below. This issue will be addressed in accordance with Avaya's Product Security Vulnerability Response Policy |
Recommended Actions:
For all vulnerable system products,
Avaya recommends that customers restrict local
and network access to the server. This restriction should be
enforced through the use of physical security, firewalls, ACLs,
VPNs, and other generally-accepted networking practices until such
time as an update becomes available and can be installed.
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: |
|---|---|
| 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. |
| 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:
In the event that the affected package
is installed, Avaya recommends that customers follow recommended actions
supplied by RedHat 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 - October 13, 2008 - Initial Statement issued.
V 2.0 - May 5, 2009 - Changed CM affected versions and actions.
V 3.0 - May 7, 2009 - Changed SES affected versions and actions, and
IALX affected versions.
V 4.0 - May 26, 2009 - Changed IALX and EMMC actions.
V 5.0 - July 1, 2009 - Changed MSS affected versions and actions.
Send information regarding any discovered security problems with Avaya products to either the contact noted in the product's documentation or [email protected].
© 2008 Avaya Inc. All Rights Reserved. All trademarks identified by the ® or ™ are registered trademarks or trademarks, respectively, of Avaya Inc. All other trademarks are the property of their respective owners.