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AA-2008.0161                  AUSCERT Advisory

                                [Appliance]
               Blue Coat products vulnerable to DNS spoofing
                               18 July 2008
- ---------------------------------------------------------------------------

        AusCERT Advisory Summary
        ------------------------

Product:              ProxySG
                      Director
                      ProxyAV
                      ProxyRA
                      PacketShaper
                      iShaper
Operating System:     Network Appliance
Impact:               Provide Misleading Information
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-1447
Member content until: Friday, August 15 2008

Ref:                  AL-2008.0080

OVERVIEW

        Blue Coat has issued an advisory which announces which of their 
        products are vulnerable to the recent DNS update as discussed in 
        AL-2008.0080.


IMPACT

        Remote attackers could redirect traffic to a malicious server by
        spoofing DNS response packets.


MITIGATION

        Affected Products:

        ProxySG: Will be fixed in: 4.2.8.7, 5.2.4.3
        Director: Will be fixed in: 4.2.2.4, 5.2.2.5
        ProxyAV: Does not implement the recommended countermeasures, but
                 uses DNS only to resolve names for updates. Downloading of
                 updates is protected by SSL (unless disabled) preventing
                 attacks based on spoofed DNS responses (other than denial
                 of service).
        ProxyRA: Will be fixed in: 2.3.2.1
        PacketShaper: Will be fixed in: 8.3.2, 8.4.0
        iShaper: Will be fixed in: 8.3.2 (in-line plane)

        Unaffected Products:

        ProxyClient: relies on host platform for DNS resolution
        Reporter: relies on host platform for DNS resolution
        Skyx: relies on host platform for DNS resolution
        Mobility: relies on host platform for DNS resolution
        iShared: versions 3.2.3, 3.4, 3.6 and 3.7

REFERENCES

        [1] DNS Cache Poisoning Vulnerability
            http://www.bluecoat.com/support/security-advisories/dns_cache_poisoning

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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