apr security update (RHSA-2011-0507)

Original Release Date: June 10, 2011
Last Revised: April 19, 2013
Number: ASA-2011-154
Risk Level: Medium
Advisory Version: 8.0
Advisory Status: Final

1. Overview:

The Apache Portable Runtime (APR) is a portability library used by the Apache HTTP Server and other projects. It provides a free library of C data structures and routines.

It was discovered that the apr_fnmatch() function used an unconstrained recursion when processing patterns with the '*' wildcard. An attacker could use this flaw to cause an application using this function, which also accepted untrusted input as a pattern for matching (such as an httpd server using the mod_autoindex module), to exhaust all stack memory or use an excessive amount of CPU time when performing matching. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-0419 to this issue.

More information about these vulnerabilities can be found in the security advisory issued by Red Hat:

2. Avaya System Products using a modified version of RHEL with affected packages installed:

Product: Affected Version(s): Risk Level: Actions:
Avaya Aura® Application Enablement Services 5.2.x, 6.1.x Low Upgrade to Application Enablement Services 6.2 or later.
Avaya Aura® Communication Manager 6.0.x, 4.0.x thru 5.2.1 including SSP1 Medium For Communication Manager 5.2 and earlier, upgrade to 5.2.1 and install Security Service Pack 2 or later.
For Communication Manager 5.2.1, install Security Service Pack 2 or later.
For Communication Manager 6.0.x, upgrade to 6.2 or later.
Avaya IP Office Application Server 6.1, 7.0 Medium Upgrade to IP Office Application Server 8.0 or later.
Avaya Meeting Exchange 5.x Low Upgrade to Meeting Exchange 6.2 or later.
Avaya Message Networking 5.2 through 5.2.3 Medium Upgrade to Message Networking 5.2.4 or later.
Avaya Messaging Storage Server 5.2 through 5.2.8 Medium Upgrade to Messaging Storage Server 5.2.9 or later.
Avaya Aura® Session Manager 1.1, 5.2, 6.0.x, 6.1.x Low Upgrade to Session Manager 6.2 or later.
Avaya Aura® SIP Enablement Services 4.0.x thru 5.2.1 including SSP1 Low For SIP Enablement Services 5.2 and earlier, upgrade to 5.2.1 and install Security Service Pack 2 or later.
For SIP Enablement Services 5.2.1, install Security Service Pack 2 or later.
Avaya Aura® System Platform 1.1, 6.0 through 6.0.3 including patches up to 6.0.3.5.3 Medium Upgrade to System Platform 6.0.3.0.3 and install patch 6.0.3.6.3 or later.
Avaya Aura® Communication Manager Utility Services 6.0.x, 6.1.x, 6.2 through 6.2.4.0.15 Low For 6.0 and 6.1, upgrade to 6.2 and install Service Pack 6.2.5.0.15 or later.
For 6.2, install Service Pack 6.2.5.0.15 or later
Avaya Voice Portal 5.0, 5.1, 5.1.1, 5.1.2 Medium Upgrade to Avaya Enterprise Linux for Voice Portal 5.1.3 and Voice Portal 5.1.3 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 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.

Mitigating Factors:

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-2011-0419
* Application Enablement Services is a low risk due to the affected module not being used.
* Meeting Exchange is a low risk due to no user input fields available on the Apache Web pages and Apache runs only if the Outlook installer download is made available from the bridge.
* Session Manger is a low risk due to the Apache Web server not being used by default.
* SIP Enablement Services is a low risk due to the Apache Web server not being used by default.
* Communication Manager Utility Services is a low risk due to the affected module not being used.

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:
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.

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 - June 10, 2011 - Initial Statement issued.
V 2.0 - August 5, 2011 - Changed CM affected versions and actions.
V 3.0 - April 5, 2012 - Changed CM, IP Office Application Server, MN, MSS, SM and SP affected versions and actions.
V 4.0 - August 29, 2012 - Changed AES actions.
V 5.0 - September 18, 2012 - Changed VP affected versions and actions.
V 6.0 - December 21, 2012 - Changed Utility Services affected versions and actions.
V 7.0 - March 21, 2013 - Changed Meeting Exchange actions and advisory status to final.
V 8.0 - April 19, 2013 - Changed CM and SES 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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