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AA-2009.0008                  AUSCERT Advisory

                             [Win][UNIX/Linux]
         A vulnerability has been identified in Sophos Anti-Virus
                              20 January 2009
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        AusCERT Advisory Summary
        ------------------------

Product:              Sophos Anti-Virus
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact:               Denial of Service
Access:               Remote/Unauthenticated
Member content until: Tuesday, February 17 2009

OVERVIEW:

      A vulnerability has been identified in Sophos Anti-Virus.


IMPACT:

      The vendor describes the vulnerability as a "... minor TAO-related 
      vulnerability within the Remote Management System (RMS) component of 
      Sophos Anti-Virus...." [1] This vulnerability can be exploited to 
      cause the RMS router to restart by sending a large malfored GIOP 
      message, resulting in a denial of service. [1] 


MITIGATION:

      The vendor recommends updating to version 3.0.9 of RMS, and also
      advises that the update has been issued automatically to customers
      using EM Library as part of the following releases [1]:
      
       * Sophos Anti-Virus for Windows 2000/XP/2003/Vista 7.6.0
       * Sophos Anti-Virus for Windows 95/98/NT 4.7.16
       * Sophos Anti-Virus for Mac OSX 4.9.15
       * Sophos Anti-Virus for Linux 6.4.4


REFERENCES:

      [1] Advisory: Minor TAO/Remote Management System (RMS) Sophos 
          Anti-Virus
          http://www.sophos.com/support/knowledgebase/article/51420.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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