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                         AUSCERT Security Bulletin

                               ASB-2010.0051
                  f5 TCP Denial of Service vulnerability
                             11 February 2010

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

Product:              BIG-IP LTM versions 9.3 - 9.3.1
                      BIG-IP LTM versions 9.4 - 9.4.8
                      BIG-IP LTM versions 9.6 - 9.6.1
                      BIG-IP LTM versions 10.0.0 - 10.0.1
                      BIG-IP GTM versions 9.3 - 9.3.1
                      BIG-IP GTM versions 9.4 - 9.4.8
                      BIG-IP GTM versions 10.0.0 - 10.0.1
                      BIG-IP ASM versions 9.3 - 9.3.1
                      BIG-IP ASM versions 9.4 - 9.4.8
                      BIG-IP ASM versions 10.0.0 - 10.0.1
                      BIG-IP Link Controller versions 9.3 - 9.3.1
                      BIG-IP Link Controller versions 9.4 - 9.4.8
                      BIG-IP Link Controller versions 10.0.0 - 10.0.1
                      BIG-IP WebAccelerator versions 9.4 - 9.4.8
                      BIG-IP WebAccelerator versions 10.0.0 - 10.0.1
                      BIG-IP PSM versions 9.4.5 - 9.4.8
                      BIG-IP PSM versions 10.0.0 - 10.0.1
                      BIG-IP SAM version 8.0
                      BIG-IP WAN Optimization versions 10.0.0 - 10.0.1
                      FirePass versions 5.5 - 5.5.2
                      FirePass versions 6.0 - 6.0.3
                      Enterprise Manager versions 1.2 - 1.4.1
                      Enterprise Manager versions 1.6 - 1.8
                      WANJet versions 4.2 - 4.2.16
                      WANJet versions 5.0 - 5.0.2
                      WebAccelerator versions 5.1.5 - 5.3.1
                      ARX versions 2.7 - 2.7.1
                      ARX versions 3.2.1 - 3.2.3
                      ARX versions 4.0.1 - 4.1.1
                      ARX versions 5.0.0 - 5.0.5
Operating System:     Network Appliance
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Mitigation
CVE Names:            CVE-2008-4609  
Member content until: Saturday, March 13 2010
Reference:            ESB-2009.1267.2

OVERVIEW

        f5 have released an advisory describing a denial of service
        vulnerability affecting TCP implementations on a number of 
        their products.


IMPACT

        The vendor has provided the following information regarding this
        vulnerability:
        
        "Sockstress DoS tool CVE-2008-4609. The TCP implementation in 
        (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, 
        (4) Cisco products, and probably other operating systems allows 
        remote attackers to cause a denial of service (connection queue 
        exhaustion) via multiple vectors that manipulate information in 
        the TCP state table, as demonstrated by sockstress." [1]


MITIGATION

        f5 has provided mitigation strategies and patches for their
        products. Please see the vendor's bulletin for details. [1]


REFERENCES

        [1] SOL10509: Sockstress DoS tool vulnerability CVE-2008-4609
            https://support.f5.com/kb/en-us/solutions/public/10000/500/sol10509.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

===========================================================================
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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