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                         AUSCERT Security Bulletin

                              ASB-2009.1138.2
                          Dovecot 1.2.8 released
                             25 November 2009

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

Product:              Dovecot
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Unauthorised Access    -- Existing Account
                      Modify Arbitrary Files -- Existing Account
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-3897  
Member content until: Wednesday, December 23 2009

Revision History:     November 25 2009: Added CVE Reference
                      November 23 2009: Initial Release

OVERVIEW

        Dovecot 1.2.8 has been released correcting a security vulnerability.


IMPACT

        The vendor has provided the following information regarding this 
        vulnerability:
        
        "This is mainly to fix the 0777 base_dir creation issue, which 
        could be considered a security hole, exploitable by local users. An 
        attacker could for example replace Dovecot's auth socket and log in 
        as otherusers. Gaining root privileges isn't possible though.
        
        This affects only v1.2 users, v1.1 and older versions were creating 
        the directory with 0755 permission." [1]


MITIGATION

        Users can download the latest release from the vendor's website. [2]


REFERENCES

        [1] [Dovecot-news] v1.2.8 released
            http://www.dovecot.org/list/dovecot-news/2009-November/000143.html

        [2] Dovecot - Downloads
            http://www.dovecot.org/download.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

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