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                         AUSCERT Security Bulletin

                              ASB-2010.0040.2
                  Denial of Service issue in DNS handling
                              4 February 2010

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

Product:              Squid
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-0308  
Member content until: Thursday, March  4 2010

Revision History:     February 4 2010: Added CVE reference
                      February 2 2010: Initial Release

OVERVIEW

        An update for Squid Proxy Cache has been released fixing a data 
        validation error.


IMPACT

        Due to incorrect data validation Squid is vulnerable to a denial of 
        service while processing a specially crafted DNS packet. [1]


MITIGATION

        This issue has been fixed in versions Squid 3.0.STABLE22 and 3.1.0.16.
        It is recommended that you update to a corrected release as soon as
        possible.[1]


REFERENCES

        [1] SQUID-2010:1
            http://www.squid-cache.org/Advisories/SQUID-2010_1.txt

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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