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                         AUSCERT Security Bulletin

                               ASB-2009.1042
      A vulnerability has been identified and corrected in strongSwan
                               5 August 2009

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

Product:              strongSwan 2.8.10 and prior
                      strongSwan 4.2.16 and prior
                      strongSwan 4.3.2 and prior
Operating System:     Linux variants
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-2661  
Member content until: Friday, September  4 2009
Reference:            AA-2009.0148

OVERVIEW

        Three new versions of strongSwan have been released to correct a
        vulnerability.


IMPACT

        The ASN.1 RDN parser denial of service vulnerability (CVE-2009-2661) 
        referenced in AA-2009.0148, was "... not completely fixed ..." in 
        versions 2.8.10, 4.2.16 and 4.3.2. [1, 2, 3]


MITIGATION

        The vendor has released versions 2.8.11, 4.2.17 and 4.3.3 to correct
        these vulnerabilities. [1, 2, 3]


REFERENCES

        [1] strongSwan 2.8  ChangeLog
            http://download.strongswan.org/CHANGES2.txt

        [2] strongSwan 4.2  ChangeLog
            http://download.strongswan.org/CHANGES42.txt

        [3] strongSwan 4.3  ChangeLog
            http://download.strongswan.org/CHANGES4.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

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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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