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                         AUSCERT Security Bulletin

                              ASB-2010.0173.2
                         OpenLDAP vulnerabilities
                               30 July 2010

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

Product:              OpenLDAP
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                      Denial of Service               -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-0211 CVE-2010-0212 
Member content until: Thursday, August 19 2010

Revision History:     July 30 2010: Added CVEs
                      July 20 2010: Initial Release

OVERVIEW

        Two denial of service vulnerabilities were discovered in 
        'out-of-the-box' standard configurations of OpenLDAP. One of these 
        flaws could lead to arbitrary code execution. [1]


IMPACT

        A maliciously crafted destination rdn string can cause OpenLDAP to
        crash while processing a 'modrdn' call.
         
        The crash can occur with segfault or at a null pointer dereference.
        The null pointer dereference could be used to execute arbitrary code
        which could lead to a system compromise.
        
        Authentication is not required to exploit these flaws. [1]


MITIGATION

        It is recommended to update to version 2.4.23


REFERENCES

        [1] Two OpenLDAP preauth vulnerabilities
            http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6570

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.

===========================================================================
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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