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                         AUSCERT Security Bulletin

                               ASB-2009.1150
 Multiple f5 Networks products vulnerable to SSL renegotion vulnerability
                              2 December 2009

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

Product:              BIG-IP
                      3-DNS
                      FirePass
                      Enterprise Manager
                      WANJet
                      ARX
Operating System:     Network Appliance
Impact/Access:        Unauthorised Access            -- Remote/Unauthenticated
                      Provide Misleading Information -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-3555  
Member content until: Friday, January  1 2010
Reference:            ASB-2009.1125.2

OVERVIEW

        f5 have released an advisory affecting multiple products including
        BIG-IP.


IMPACT

        The vendor has provided the following information regarding these
        HotFixes and their associated vulnerabilities:
        
        SSL Renegotiation vulnerability - CVE-2009-3555
        
        "A Man in the Middle attack allows an attacker to inject an arbitrary
        amount of chosen plaintext into the application protocol stream data
        during an SSL session renegotiation. This may provide an attacker the
        ability to perform arbitrary actions on affected websites with user's
        credentials. This vulnerability does not allow one to decrypt the
        intercepted network communication." [1]


MITIGATION

        The vendor has announced that BIG-IP version 9.4.8 HF1 resolves
        this issue. [2]
        
        The vendor has also made the following statement regarding hotfixes
        for this issue:
        
        "An engineering hotfix has been issued for FirePass versions 6.1, 6.0.3,
        6.0.2, 5.5.2, 5.5.1, and 5.5. Customers affected by this issue should
        contact F5 Networks Technical Support, referencing this Solution number
        and the associated CR number (CR132177), to request the hotfix."
        
        An engineering hotfix has also been issued for Enterprise Manager version
        1.8. Customers affected by this issue should contact F5 Networks
        Technical Support, referencing this Solution number and the associated
        CR number (CR132166), to request the hotfix." [1]


REFERENCES

        [1] SOL10737: SSL Renegotiation vulnerability - CVE-2009-3555 /
            VU#120541
            https://support.f5.com/kb/en-us/solutions/public/10000/700/sol10737.html

        [2] SOL10796: Overview of BIG-IP version 9.4.8 HF1
            https://support.f5.com/kb/en-us/solutions/public/10000/700/sol10796.html

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. 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.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
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.
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