AusCERT - AA-2009.0154 -- [Linux] -- Openswan: Denial of Service

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AA-2009.0154 -- [Linux] -- Openswan: Denial of Service

Date: 26 June 2009
References: ESB-2009.1012 ESB-2009.1366 ESB-2009.1370 ASB-2009.1145

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AA-2009.0154                  AUSCERT Advisory

                                  [Linux]
                        Openswan: Denial of Service
                               26 June 2009
- ---------------------------------------------------------------------------

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

Product:              Openswan 2.6 prior to 2.6.22
                      Openswan 2.4 prior to 2.4.15
Operating System:     Linux variants
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-2185
Member content until: Friday, July 24 2009

OVERVIEW:

       Two denial of service vulnerabilities have been reported in
       Openswan due to an error in the ASN.1 parsing. [1]


IMPACT:

       The two vulnerabilities (CVE-2009-2185) allow a remote attacker
       to crash Openswan. [2]

       The vendor has provided the following details in the change log:

       "Malicious X.509 certificates could crash the asn.1 parser. Found
       by Orange Labs vulnerability research team. Patches via an
       irresponsible 0-day public announcement by Andreas Steffen" [1]


MITIGATION:

       Upgrade Openswan to version 2.6.22 or 2.4.15.


REFERENCES:

       [1] http://openswan.org/download/CHANGES

       [2] CVE-2009-2185
           http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2185

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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