openssh security update (RHSA-2008-0855)

Original Release Date: October 13, 2008
Last Revised: July 1, 2009
Number: ASA-2008-399
Risk Level: Low
Advisory Version: 6.0
Advisory Status: Interim

1. Overview:

OpenSSH is OpenBSD's SSH (Secure SHell) protocol implementation.

Last week Red Hat detected an intrusion on certain of its computer systems and took immediate action. While the investigation into the intrusion is on-going, our initial focus was to review and test the distribution channel we use with our customers, Red Hat Network (RHN) and its associated security measures. Based on these efforts, we remain highly confident that our systems and processes prevented the intrusion from compromising RHN or the content distributed via RHN and accordingly believe that customers who keep their systems updated using Red Hat Network are not at risk. We are issuing this alert primarily for those who may obtain Red Hat binary packages via channels other than those of official Red Hat subscribers.

In connection with the incident, the intruder was able to sign a small number of OpenSSH packages relating only to Red Hat Enterprise Linux 4 (i386 and x86_64 architectures only) and Red Hat Enterprise Linux 5 (x86_64 architecture only). As a precautionary measure, we are releasing an updated version of these packages, and have published a list of the tampered packages and how to detect them at http://www.redhat.com/security/data/openssh-blacklist.html

To reiterate, our processes and efforts to date indicate that packages obtained by Red Hat Enterprise Linux subscribers via Red Hat Network are not at risk.

These packages also fix a low severity flaw in the way ssh handles X11 cookies when creating X11 forwarding connections. When ssh was unable to create untrusted cookie, ssh used a trusted cookie instead, possibly allowing the administrative user of a untrusted remote server, or untrusted application run on the remote server, to gain unintended access to a users local X server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2007-4752 to this issue.

More information about these vulnerabilities can be found in the security advisory issued by RedHat Linux:

2. Avaya System Products with openssh installed:

Product: Affected Version(s): Risk Level: Actions:
Avaya Communication Manager 5.1 and earlier Low Upgrade to CM 5.2 or later.
Avaya Intuity AUDIX LX All 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 5.0 and earlier Low Upgrade to MSS 5.1 or later.
Avaya Message Networking All Low See recommended actions below.  This issue will be addressed in accordance with Avaya's Product Security Vulnerability Response Policy
Avaya SIP Enablement Services 5.1 and earlier Low Upgrade to SES 5.2 or later.
Avaya Voice Portal 4.1 and earlier Low Upgrade to VP 5.0 or later.
Avaya Meeting Exchange All Low See recommended actions below.  This issue will be addressed in accordance with Avaya's Product Security Vulnerability Response Policy
Avaya Proactive Contact 4.0, 4.1 Low Upgrade to PC 4.1.1 or later.
Avaya AES 4.2.1 and earlier Low Upgrade to AES 4.2.2 or later.

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.

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:
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.

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 - 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.
V 4.0 - May 26, 2009 - Changed IALX and EMMC actions.
V 5.0 - June 5, 2009 - Changed VP, PC and AES affected versions and recommended actions.
V 6.0 - 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 securityalerts@avaya.com.

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