The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).
A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure Sockets Layer) protocols handled session renegotiation. A man-in-the-middle attacker could use this flaw to prefix arbitrary plain text to a client's session (for example, an HTTPS connection to a website). This could force the server to process an attacker's request as if authenticated using the victim's credentials. This update addresses this flaw by implementing the TLS Renegotiation Indication Extension, as defined in RFC 5746. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2009-3555 to this issue.
Refer to the following Knowledgebase article for additional details about the CVE-2009-3555 flaw: http://kbase.redhat.com/faq/docs/DOC-20491
It was found that browsers could accept certificates with MD2 hash signatures, even though MD2 is no longer considered a cryptographically strong algorithm. This could make it easier for an attacker to create a malicious certificate that would be treated as trusted by a browser. GnuTLS now disables the use of the MD2 algorithm inside signatures by default. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2009-2409 to this issue.
More information about these vulnerabilities can be found in the security advisory issued by RedHat Linux:
|Product:||Affected Version(s):||Risk Level:||Actions:|
|Avaya IQ||5.0, 5.1||Low||Upgrade to IQ 5.2 or later.|
|Avaya Aura® Session Manager||1.1, 5.2, 6.0||Low||Upgrade to Session Manager 6.1 or later.|
|Avaya Aura® System Manager||5.2, 6.0||Low||Upgrade to System Manager 6.0 SP1 or later.|
|Avaya Aura® System Platform||1.1||Low||Upgrade to System Platform 6.0 or later.|
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's product and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as a product update is available or the recommended action is applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period.
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.
|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 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.
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V 1.0 - May 3, 2010 - Initial Statement issued.
V 2.0 - October 21, 2010 - Updated affected versions for SM & SMGR, and actions for SMGR & SP.
V 3.0 - January 11, 2011 - Updated actions for SM.
V 4.0 - July 22, 2011 - Updated IQ affected versions and actions, and changed 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 firstname.lastname@example.org.
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