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             AUSCERT External Security Bulletin Redistribution

               Expat XML library vulnerability CVE-2016-4472
                              24 October 2016


        AusCERT Security Bulletin Summary

Product:           F5 ARX
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        None
CVE Names:         CVE-2016-4472  

Reference:         ESB-2016.2195

Original Bulletin: 

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sol22232964: Expat XML library vulnerability CVE-2016-4472 Security 
AdvisorySecurity Advisory

Original Publication Date: 10/21/2016

Vulnerability Description

The overflow protection in Expat is removed by compilers with certain 
optimization settings, which allows remote attackers to cause a denial of 
service (crash) or possibly execute arbitrary code via crafted XML data. NOTE:
this vulnerability exists because of an incomplete fix for CVE-2015-1283 and 
CVE-2015-2716. (CVE-2016-4472)


This vulnerability may allow a remote attacker to cause the unauthorized 
disclosure of information, unauthorized modifications, or denial-of-service 
(DoS) attacks using crafted XML data.

Security Issue Status

F5 Product Development has assigned ID 528541 (ARX) 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 

Product 	Versions known to be vulnerable 	Versions known to be not vulnerable 	Severity 	Vulnerable component or feature 
ARX 		6.2.0 - 6.4.0 				None 					Low 		Expat XML parser library

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.



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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