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AUSCERT External Security Bulletin Redistribution
ESB-2016.2194
sol70191975: Apache Xerces vulnerability CVE-2016-4463
16 September 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP APM
F5 ARX
F5 Enterprise Manager
Publisher: F5 Networks
Operating System: Network Appliance
Virtualisation
Impact/Access: Denial of Service -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2016-4463
Reference: ESB-2016.1626
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/70/sol70191975.html
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sol70191975: Apache Xerces vulnerability CVE-2016-4463
Security Advisory
Original Publication Date: 09/15/2016
Vulnerability Description
Stack-based buffer overflow in Apache Xerces-C++ before 3.1.4 allows
context-dependent attackers to cause a denial of service via a deeply nested
DTD. (CVE-2016-4463)
Impact
An attacker requires privileged access to a dynamically generated XML file to
exploit one of the affected components of the BIG-IP APM system. Additionally,
an attacker must have access to a privileged user in order to download a
malformed XML file on the system to trigger the exploit.
Security Issue Status
F5 Product Development has assigned ID 612393 (BIG-IP), ID 599815 (Enterprise
Manager), and ID 595939 (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
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Severity Vulnerable component or feature
BIG-IP APM 12.0.0 - 12.1.1 11.2.1 Medium PolicySync and the samlidpd daemon
11.4.0 - 11.6.1 10.2.1 - 10.2.4
ARX 6.2.0 - 6.4.0 None Low XML parser
Enterprise Manager 3.1.1 None Medium EM daemons
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
To mitigate this vulnerability, you should permit management access to F5
products only over a secure network and limit shell access to only trusted
users. For more information, refer to SOL13309: Restricting access to the
Configuration utility by source IP address (11.x - 12.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
SOL167: Downloading software and firmware from F5
SOL13123: Managing BIG-IP product hotfixes (11.x - 12.x)
SOL9502: BIG-IP hotfix matrix
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