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===========================================================================
                         AUSCERT Security Bulletin

                              ASB-2012.0074.2
      IP addresses in sudoers with netmask may match additional hosts
                                24 May 2012

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

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

Product:              sudo
Operating System:     UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Unauthorised Access -- Existing Account
Resolution:           Patch/Upgrade
CVE Names:            CVE-2012-2337  
Member content until: Saturday, June 16 2012

Revision History:     May 24 2012: Updated CVE reference
                      May 17 2012: Initial Release

OVERVIEW

        A vulnerability exists in sudo versions 1.6.9p3 through 1.8.4p4 which 
        may allow users authorised to run commands to do so on hosts that 
        belong to other networks not explicitly listed in sudoers.


IMPACT

        The vendor provided this Vulnerability description:
        
        "Exploitation of the bug requires that the user already be in the 
        sudoers file (or sudoers LDAP data) and be granted access to commands 
        on hosts on one or more IPv4 networks.
        
        If sudoers does not include IP networks in the host specification 
        portion of the sudoers rules, the bug has no effect." [1]


MITIGATION

        Upgrade sudo to version 1.8.4p5 or 1.7.9p1


REFERENCES

        [1] IP addresses in sudoers with netmask may match additional hosts
            http://www.sudo.ws/sudo/alerts/netmask.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.

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