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                         AUSCERT Security Bulletin

                               ASB-2013.0072
     A vulnerability has been identified on Nexus 7000 series switches
                                7 June 2013

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

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

Product:              Cisco Nexus 7000 series switches
Operating System:     Cisco
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2012-3051  
Member content until: Sunday, July  7 2013

OVERVIEW

        A vulnerability has been identified in versions prior to 
        Cisco NX-OS 5.2.9 on the Nexus 7000 series switches.


IMPACT

        The vendor has provided the following details regarding the 
        vulnerability:
        
        "Symptoms:
        –The Adjmgr process fails when an ARP packet is received.
        –The adjacency manager can have a stale entry that cause packet drops.
        
        Conditions: 
        This symptom might be seen when continuous ARP packets are received 
        for a long period of time from various hosts in the subnet destined 
        to a Cisco Nexus 7000 Series switch IP address." [1]


MITIGATION

        The vendor recommends upgrading to 5.2.9 to mitigate this 
        vulnerability.


REFERENCES

        [1] Cisco Nexus 7000 Series NX-OS Release Notes, Release 5.2
            http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/notes/52_nx-os_release_note.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.

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