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             AUSCERT External Security Bulletin Redistribution

        SOL16841: GNU C Library (glibc) vulnerability CVE-2013-7423
                                3 July 2015


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Access Confidential Data -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2013-7423  

Reference:         ESB-2015.1725

Original Bulletin: 

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SOL16841: GNU C Library (glibc) vulnerability CVE-2013-7423

Security Advisory

Original Publication Date: 07/02/2015


The send_dg function in resolv/res_send.c in GNU C Library (aka glibc or 
libc6) before 2.20 does not properly reuse file descriptors, which allows 
remote attackers to send DNS queries to unintended locations via a large 
number of request that trigger a call to the getaddrinfo function. 


This vulnerability can only be exploited in F5 products by locally 
authenticated users. An attacker may be able to send DNS queries to unintended
recipients, resulting in information disclosure or data loss due to the 
application encountering corrupted data. No remote vulnerabilities are known.


F5 Product Development has assigned ID 520153 (BIG-IP), ID 522207 (BIG-IQ), 
and ID 522209 (Enterprise Manager) 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 

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 				None 			6.0.0 - 6.4.0 		Not vulnerable	None

Enterprise Manager 		3.0.0 - 3.1.1
				2.1.0 - 2.3.0 		None 			Low		glibc

FirePass 			None 			7.0.0		
							6.0.0 - 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 			None			4.0.0 - 4.4.0
							3.3.2 - 3.5.1		Not vulnerable	None

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.

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.

You should permit access to F5 products only over a secure network and limit 
login access to trusted users. For more information, refer to 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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