AusCERT - AA-2009.0115 -- [Win][UNIX/Linux] -- OpenSC: Inappropriate Access

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AA-2009.0115 -- [Win][UNIX/Linux] -- OpenSC: Inappropriate Access
Date: 14 May 2009

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AA-2009.0115                  AUSCERT Advisory

                             [Win][UNIX/Linux]
                       OpenSC: Inappropriate Access
                                14 May 2009
- ---------------------------------------------------------------------------

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

Product:              OpenSC prior to 0.11.8
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact:               Inappropriate Access
                      Reduced Security
Access:               Existing Account
CVE Names:            CVE-2009-1603
Member content until: Thursday, June 11 2009

OVERVIEW:

       A vulnerability has been identified in OpenSC prior to version 
       0.11.8.


IMPACT:

       This vulnerability is the result of "...a code bug in pkcs11-tool it 
       had the wrong public exponent. But OpenSC PKCS#11 module is secure, 
       it ignores the public exponent. So only if you generate your keys with 
       pkcs11-tool from OpenSC 0.11.7 (which very few people do), and only 
       if you used it with sone [sic] other vendors PKCS#11 module, and only 
       if the card accepted the bogus value too, then your rsa key is 
       unsecure." [1]


MITIGATION:

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


REFERENCES:

       [1] OpenSC 0.11.8 was released yesterday with a security update.
           http://www.openwall.com/lists/oss-security/2009/05/08/1

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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