httpd security update (RHSA-2012-0323)

Original Release Date: March 20, 2012
Last Revised: April 17, 2015
Number: ASA-2012-127
Risk Level: Low
Advisory Version: 5.0
Advisory Status: Final

1. Overview:

The Apache HTTP Server is a popular web server.

It was discovered that the fix for CVE-2011-3368 (released via RHSA-2011:1392) did not completely address the problem. An attacker could bypass the fix and make a reverse proxy connect to an arbitrary server not directly accessible to the attacker by sending an HTTP version 0.9 request. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-3639 to this issue.

The httpd server included the full HTTP header line in the default error page generated when receiving an excessively long or malformed header. Malicious JavaScript running in the server's domain context could use this flaw to gain access to httpOnly cookies. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2012-0053 to this issue.

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way httpd performed substitutions in regular expressions. An attacker able to set certain httpd settings, such as a user permitted to override the httpd configuration for a specific directory using a ".htaccess" file, could use this flaw to crash the httpd child process or, possibly, execute arbitrary code with the privileges of the "apache" user. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-3607 to this issue.

A flaw was found in the way httpd handled child process status information. A malicious program running with httpd child process privileges (such as a PHP or CGI script) could use this flaw to cause the parent httpd process to crash during httpd service shutdown. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2012-0031 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 RHEL5 with affected components/packages installed:
Product: Affected Version(s): Risk Level: Actions:
Avaya Aura® Application Enablement Services 5.x, 6.1, 6.1.1, 6.1.2 Low Upgrade to AES 6.2 or later.
Avaya Aura® Communication Manager 6.0.x thru 6.2 Low Upgrade to 6.3 or later.
Avaya IP Office Application Server 6.x, 7.x, 8.x Low Upgrade to 9.0 or later.
Avaya Aura® Messaging 6.0.x, 6.1.x Low Upgrade toMessaging 6.2 or later.
Avaya Aura® Session Manager 1.x, 5.x, 6.1.x Low Upgrade to SM 6.2 or later.
Avaya Aura® Communication Manager Utility Services 6.0, 6.1, 6.2 Low Utility Services 6.0 and 6.1, upgrade to 6.1.0.4.8 or later.
Utility Services 6.2, upgrade to 6.2.5.0.15 or later.
Avaya Voice Portal 5.0.x, 5.1, 5.1.1, 5.1.2 Low Upgrade to 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-2011-3607
CVE-2011-3639
CVE-2012-0053
These are rated low risk for Communication Manager,IP Office Application Service, Avaya Aura Messaging, Utility Services and Voice Portal as no critical services or processes are affected.
These are rated low risk for Application Enablement Services as function is not configured or used by default.
CVE-2012-0031
This is rated low risk for Communication Manager, IP Office Application Service, Avaya Aura Messaging, Utility Services and Voice Portal as no critical services or processes are affected.
This is rated low risk for Application Enablement Services as no critical services or processes are affected.

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 Aura® Experience Portal Depending on the Operating System provided by customers, 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 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 Secure Access Link Gateway Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the SAL Gateway 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.
Avaya Voice Portal Depending on the Operating System provided by customers, 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 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 - March 20, 2012 - Initial Statement issued.
V 2.0 - March 28, 2012 - updated mitigating factor statements.
V 3.0 - December 7, 2012 - Updated affected versions and actions for AES, AAM and VP.
V 4.0 - January 2, 2013 - Updated affected versions and actions for CMUS.
V 5.0 - April 17, 2015 - Updated affected versions and actions for CM and IPOAS, 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 securityalerts@avaya.com.

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