pam security update (RHSA-2010-0819)

Original Release Date: December 17, 2010
Last Revised: June 26, 2013
Number: ASA-2010-331
Risk Level: Medium
Advisory Version: 5.0
Advisory Status: Final

1. Overview:

Pluggable Authentication Modules (PAM) provide a system whereby administrators can set up authentication policies without having to recompile programs that handle authentication.

It was discovered that the pam_namespace module executed the external script namespace.init with an unchanged environment inherited from an application calling PAM. In cases where such an environment was untrusted (for example, when pam_namespace was configured for setuid applications such as su or sudo), a local, unprivileged user could possibly use this flaw to escalate their privileges. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-3853 to this issue.

It was discovered that the pam_mail module used root privileges while accessing users' files. In certain configurations, a local, unprivileged user could use this flaw to obtain limited information about files or directories that they do not have access to. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-3435 to this issue.

It was discovered that the pam_xauth module did not verify the return values of the setuid() and setgid() system calls. A local, unprivileged user could use this flaw to execute the xauth command with root privileges and make it read an arbitrary input file. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-3316 to this issue.

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

2. Avaya System Products with pam installed:

Product: Affected Version(s): Risk Level: Actions:
Avaya Aura® Application Enablement Services 5.2.2 and earlier Low Upgrade to AES 5.2.3 or later.
Avaya Aura® Communication Manager 6.0.x Low Upgrade to CM 6.2 or later.
Avaya Communication Server 1000:
  • CS1000E
  • CS1000M
  • CS1000E/CS1000M Signaling Server
6.x, 7.x Low See recommended actions and Mitigating Factors table below. this advisory will not be addressed as no further releases are planned.
Avaya Aura® Conferencing Standard Edition 6.x Medium See recommended actions and Mitigating Factors table below. This advisory will not be addressed as no further releases are planned. It is recommended that customers migrate to one of Avaya's conferencing solutions including Aura┬« Conferencing 7.0 or later.
Avaya IQ 5.1 and earlier Medium Upgrade to IQ 5.2 or later.
Avaya Aura® Presence Services 6.0, 6.1, 6.1.1 Medium Upgrade to PS 6.1.2 or later.
Avaya Aura® Session Manager 1.1, 5.2, 6.0.x, 6.1.x Low Upgrade to SM 6.2 or later.
Avaya Aura® System Manager 5.2, 6.0, 6.1, 6.1.1 Medium Upgrade to SMGR 6.1.2 or later.
Avaya Aura® System Platform 1.1, 6.0 including SP2 and earlier Medium Upgrade to SP 6.0 SP3 (6.0.3.0.3) or later.
Avaya Voice Portal 5.0, 5.1 including SP1 Medium Upgrade to Avaya Enterprise Linux for VP 5.1 SP2 and VP 5.1 SP2 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.

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 the listed affected Avaya products:

Vulnerability Mitigating Factors
CVE-2010-3316
CVE-2010-3435
CVE-2010-3853
AES risk is low because AES does not have X Windows installed or the modules loaded.
CM risk is low because CM does not have X Windows installed and the modules are not used or supported.
SM risk is low because the modules are not used or supported.
CS1K risk is low because of how CS1K users are setup. There are only two types of users by default: Admin users which have the highest system privileges for installation and system support, and restricted users which only have access to Web pages without the ability to install or run applications needed to exploit the vulnerabilities.

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 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 - December 17, 2010 - Initial Statement issued.
V 2.0 - March 28, 2011 - Changed AES, IQ and SP affected versions and actions.
V 3.0 - December 15, 2011 - Changed SMGR and VP affected versions and actions.
V 4.0 - April 5, 2012 - Changed CM, PS and SM affected versions and actions.
V 5.0 - June 26, 2013 - Changed CS1000 and Conferencing SE actions, and 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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