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                         AUSCERT Security Bulletin

                              ASB-2009.1034.2
  Asterisk 1.6.1.2 released to correct a Denial of Service vulnerability
                               31 July 2009

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

Product:              Asterisk
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch
CVE Names:            CVE-2009-2651  
Member content until: Friday, August 28 2009

Revision History:     July 31 2009: Added CVE
                      July 29 2009: Initial Release

OVERVIEW

        A vulnerability has been identified in Asterisk prior to version 
        1.6.1.2.


IMPACT

        This vulnerability could allow an attacker to "... cause Asterisk to 
        crash remotely by sending malformed RTP text frames." [1]


MITIGATION

        The vendor recommends upgrading to the latest version of Asterisk. [1]


REFERENCES

        [1] Asterisk Project Security Advisory - AST-2009-004
            http://downloads.asterisk.org/pub/security/AST-2009-004.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

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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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