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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.2468
           sol55672042: Linux kernel vulnerability CVE-2016-4470
                              24 October 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
                   Virtualisation
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-4470  

Reference:         ESB-2016.2438
                   ESB-2016.2008
                   ESB-2016.1616

Original Bulletin: 
   https://support.f5.com/kb/en-us/solutions/public/k/55/sol55672042.html

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sol55672042: Linux kernel vulnerability CVE-2016-4470 Security 
AdvisorySecurity Advisory

Original Publication Date: 10/22/2016

Vulnerability Description

The key_reject_and_link function in security/keys/key.c in the Linux kernel 
through 4.6.3 does not ensure that a certain data structure is initialized, 
which allows local users to cause a denial of service (system crash) via 
vectors involving a crafted keyctl request2 command. (CVE-2016-4470)

Impact

Allows disruption of service.

Security Issue Status

F5 Product Development has assigned ID 623119 (BIG-IP), ID 623155 (BIG-IQ) and
ID 623156 (Enterprise Manager) to this vulnerability.

To determine if your release is known to be vulnerable, the components or 
features that are affected by the vulnerability, and for information about 
releases or hotfixes that address the vulnerability, refer to the following 
table:

Product				Versions known to be vulnerable		Versions known to be not vulnerable	Severity	Vulnerable component or feature
BIG-IP LTM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1
				11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP AAM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1				None					Medium		Linux Kernel
BIG-IP AFM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1				None					Medium		Linux Kernel
BIG-IP Analytics		12.0.0 - 12.1.1
				11.4.0 - 11.6.1
				11.2.1					None					Medium		Linux Kernel
BIG-IP APM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1
				11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP ASM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1
				11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP DNS			12.0.0 - 12.1.1				None					Medium		Linux Kernel
BIG-IP Edge Gateway		11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP GTM			11.4.0 - 11.6.1
				11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP Link Controller		12.0.0 - 12.1.1
				11.4.0 - 11.6.1
				11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP PEM			12.0.0 - 12.1.1
				11.4.0 - 11.6.1				None					Medium		Linux Kernel
BIG-IP PSM			11.4.0 - 11.4.1				10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP WebAccelerator		11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
BIG-IP WOM			11.2.1					10.2.1 - 10.2.4				Medium		Linux Kernel
Enterprise Manager		3.1.1					None					Medium		Linux Kernel
BIG-IQ Cloud			4.0.0 - 4.5.0				None					Medium 		Linux Kernel
BIG-IQ Device			4.2.0 - 4.5.0				None					Medium		Linux Kernel
BIG-IQ Security			4.0.0 - 4.5.0				None					Medium 		Linux Kernel
BIG-IQ ADC			4.5.0					None					Medium		Linux Kernel
BIG-IQ Centralized Management	5.0.0 - 5.1.0
				4.6.0					None					Medium 		Linux Kernel
BIG-IQ Cloud and Orchestration	1.0.0					None					Medium		Linux Kernel
F5 iWorkflow			2.0.0 - 2.0.1				None					Medium		Linux Kernel
Traffix SDC			5.0.0
				4.0.0 - 4.4.0				None					Low		Linux Kernel

Vulnerability Recommended Actions

If you are running a version listed in the Versions known to be vulnerable 
column, you can eliminate this vulnerability by upgrading to a version listed
in the Versions known to be not vulnerable column. If the table lists only an
older version than what you are currently running, or does not list a 
non-vulnerable version, then no upgrade candidate currently exists.

To determine the necessary upgrade path for your BIG-IQ system, you should 
understand the BIG-IQ product offering name changes. For more information, 
refer to SOL21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow 
systems.

Mitigation

None

Supplemental Information

SOL9970:  Subscribing to email notifications regarding F5 products 
SOL9957:  Creating a custom RSS feed to view new and updated documents 
SOL4602:  Overview of the F5 security vulnerability response policy 
SOL4918:  Overview of the F5 critical issue hotfix policy 
SOL167:   Downloading software and firmware from F5
SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x) 
SOL9502:  BIG-IP hotfix matrix 
SOL15106: Managing BIG-IQ product hotfixes 
SOL15113: BIG-IQ hotfix matrix 
SOL6664:  Obtaining and installing OPSWAT hotfixes 
SOL10942: Installing OPSWAT hotfixes on BIG-IP APM systems

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