Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

               sol16135: OpenSSL vulnerability CVE-2015-0205
                             13 February 2015


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-0205  

Reference:         ASB-2015.0015

Original Bulletin: 

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

sol16135: OpenSSL vulnerability CVE-2015-0205

Security Advisory

Original Publication Date: 02/12/2015


The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p
and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman 
(DH) certificate without requiring a CertificateVerify message, which allows 
remote attackers to obtain access without knowledge of a private key via 
crafted TLS Handshake Protocol traffic to a server that recognizes a 
Certification Authority with DH support. (CVE-2015-0205)


If you have enabled client certificate authentication for the BIG-IP 
Configuration utility, a remote attacker with a client certificate that 
contains a static Diffie-Hellman (DH) key may be able to authenticate 
successfully without a private key and gain access to the BIG-IP Configuration
utility. The affected client certificate must be signed by a Certificate 
Authority (CA) that is trusted by the BIG-IP system. By default, the BIG-IP 
Configuration utility does not use client certificate authentication for 
access control.


F5 Product Development has assigned ID 500092 (BIG-IP) and LRS-37958 
(LineRate) 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 be vulnerable 	Versions known to be not vulnerable 	Vulnerable component or feature

BIG-IP LTM 	11.5.0 - 11.6.0				11.0.0 - 11.4.1
							10.1.0 - 10.2.4				Configuration utility

BIG-IP AAM 	11.5.0 - 11.6.0				11.4.0 - 11.4.1				Configuration utility

BIG-IP AFM 	11.5.0 - 11.6.0				11.3.0 - 11.4.1				Configuration utility

Analytics 	11.5.0 - 11.6.0 			11.0.0 - 11.4.1				Configuration utility

BIG-IP APM 	11.5.0 - 11.6.0				11.0.0 - 11.4.1
							10.1.0 - 10.2.4				Configuration utility

BIG-IP ASM 	11.5.0 - 11.6.0				11.0.0 - 11.4.1
							10.1.0 - 10.2.4				Configuration utility

BIG-IP GTM 	11.5.0 - 11.6.0				11.0.0 - 11.4.1
							10.1.0 - 10.2.4				Configuration utility

BIG-IP Link 
Controller 	11.5.0 - 11.6.0				11.0.0 - 11.4.1
							10.1.0 - 10.2.4				Configuration utility

BIG-IP PEM 	11.5.0 - 11.6.0				11.3.0 - 11.4.1				Configuration utility

LineRate 	2.5.0
		2.4.0 - 2.4.2				None					OpenSSL

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 is responding to this vulnerability as determined by the parameters defined
in SOL4602: Overview of the F5 security vulnerability response policy.


To mitigate this vulnerability, you should consider the following 

    Revoke and reissue the affected client certificates, if applicable, for 
    your environment. Disable client certificate authentication for the BIG-IP 
    Configuration utility.

To disable client certificate authentication for the BIG-IP Configuration 
utility, perform the following procedure:

Impact of action: Performing the following procedure should not have a 
negative impact on your system.

    Log in to the tmsh utility. Disable the client certificate authentication
    by typing the following command:

    modify /sys httpd ssl-ca-cert-file none ssl-verify-client no Save the 
    configuration to the configuration files by typing the following command:

    save /sys config


To mitigate the risk posed by this vulnerability for the affected LineRate 
versions, you can remove the affected trusted Certificate Authority in the SSL
component. For information about removing trusted Certificate Authority for 
LineRate, refer to the following guides:

Note: The following links take you to a resource outside of AskF5. The third 
party could remove the documents without our knowledge.

    The SSL Mode Commands chapter of the LineRate 2.5.0 CLI Reference Guide 
    The SSL Mode Commands chapter of the LineRate 2.4.x CLI Reference Guide

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

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
Comment: http://www.auscert.org.au/render.html?it=1967