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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.1810
        SOL16865: GNU C Library (glibc) vulnerability CVE-2015-1781
                                9 July 2015

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

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

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2015-1781  

Reference:         ESB-2015.1099

Original Bulletin: 
   https://support.f5.com/kb/en-us/solutions/public/16000/800/sol16865.html

- --------------------------BEGIN INCLUDED TEXT--------------------

SOL16865: GNU C Library (glibc) vulnerability CVE-2015-1781

Security Advisory

Original Publication Date: 07/08/2015

Description

A buffer overflow flaw was found in the way glibc's gethostbyname_r() and 
other related functions computed the size of a buffer when passed a misaligned
buffer as input. An attacker able to make an application call any of these 
functions with a misaligned buffer could use this flaw to crash the 
application or, potentially, execute arbitrary code with the permissions of 
the user running the application. (Red Hat Bugzilla Bug 1199525)

Impact

An attacker with local access and knowledge of how to make the glibc function
trigger an exploit may be able to crash the application or run arbitrary code.

Status

F5 Product Development has assigned ID 521568 (BIG-IP, BIG-IQ and Enterprise 
Manager) and ID 476571 (ARX) to this vulnerability, and has evaluated the 
currently supported releases for potential 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  	Versions known to  	Severity 	Vulnerable component 
			be vulnerable		be not vulnerable			or feature

BIG-IP LTM 		11.0.0 - 11.6.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP AAM 		11.4.0 - 11.6.0*	None			Low 		glibc

BIG-IP AFM 		11.3.0 - 11.6.0*	None			Low 		glibc

BIG-IP Analytics 	11.0.0 - 11.6.0*	None			Low 		glibc

BIG-IP APM 		11.0.0 - 11.6.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP ASM 		11.0.0 - 11.6.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP Edge Gateway	11.0.0 - 11.3.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP GTM 		11.0.0 - 11.6.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP Link Controller 	11.0.0 - 11.6.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP PEM 		11.3.0 - 11.6.0*	None			Low 		glibc

BIG-IP PSM 		11.0.0 - 11.4.1*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP WebAccelerator 	11.0.0 - 11.3.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

BIG-IP WOM 		11.0.0 - 11.3.0*
			10.1.0 - 10.2.4*	None			Low 		glibc

ARX 			6.0.0 - 6.4.0		None			Medium 		glibc

Enterprise Manager 	3.0.0 - 3.1.1*		None 			Low 		glibc

FirePass 		None			7.0.0
						6.1.0			Not vulnerable 	None

BIG-IQ Cloud 		4.0.0 - 4.5.0*		None			Low 		glibc

BIG-IQ Device 		4.2.0 - 4.5.0*		None			Low 		glibc

BIG-IQ Security 	4.0.0 - 4.5.0*		None			Low 		glibc

BIG-IQ ADC 		4.5.0*			None			Low 		glibc

LineRate 		None			2.5.0 - 2.6.0		Not vulnerable 	None

F5 WebSafe 		None			1.0.0			Not vulnerable 	None

Traffix SDC 		4.0.0 - 4.4.0
			3.3.2 - 3.5.1		None			Low 		glibc

Note: As of February 17, 2015, AskF5 Security Advisory articles include the 
Severity value. Security Advisory articles published before this date do not 
list a Severity value.

*Although the BIG-IP, BIG-IQ, and Enterprise Manager software contains the 
vulnerable code, BIG-IP, BIG-IQ, and Enterprise Manager do not use the 
vulnerable code in a way that exposes the vulnerability in a standard 
configuration. An attacker must have local access to BIG-IP, BIG-IQ, 
Enterprise Manager to upload a custom binary in order to trigger an exploit 
that the attacker can then crash the application or run arbitrary code. 
Therefore, F5 Product Development considers this vulnerability as Not 
Vulnerable in a standard configuration and Low Severity if management access 
to BIG-IP, BIG-IQ, and Enterprise Manager is not adequately protected; for 
example over a secure network.

Recommended Action

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

F5 responds to vulnerabilities in accordance with the Severity values 
published in the previous table. The Severity values and other security 
vulnerability parameters are defined in SOL4602: Overview of the F5 security 
vulnerability response policy.

To mitigate this vulnerability, you should only permit management access to F5
products over a secure network and limit shell access to trusted users.

For more information about securing access to BIG-IP and Enterprise Manager 
systems, refer to SOL13309: Restricting access to the Configuration utility by
source IP address (11.x) and SOL13092: Overview of securing access to the 
BIG-IP system.

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

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