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                         AUSCERT Security Bulletin

                               ASB-2013.0008
          Multiple vulnerabilities have been fixed in Nagios Core
                              17 January 2013

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

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

Product:              Nagios Core
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                      Denial of Service               -- Existing Account      
Resolution:           Patch/Upgrade
CVE Names:            CVE-2012-6096  
Member content until: Saturday, February 16 2013

OVERVIEW

        An update has been released to fix a vulnerability in the Nagios Core 
        network monitoring package, prior to version 3.4.4 [1]


IMPACT

        The following details have been provided by Neohapsis regarding the 
        vulnerability:
        
        "history.cgi is vulnerable to a buffer overflow due to the use of
        sprintf with user supplied data that has not been restricted in size.
        This vulnerability does not appear to be exploitable on the majority
        of systems (due to stack cookies, the NX bit, etc)." [2]
        
        This vulnerability has been assigned CVE-2012-6096. Under certain 
        circumstances it may lead to remote command execution. [3]
        
        A segmentation fault on Solaris and other bugs have been fixed in Nagios 
        Core 3.4.4 [4]


MITIGATION

        The vendor recommends updating Nagios to the latest version to correct
        the issue. [1]


REFERENCES

        [1] Nagios Core 3.4.4 Released
            http://www.nagios.org/news/77-news-announcements/346-nagios-core-344-released

        [2] Nagios Core 3.4.3: Stack based buffer overflow in web interface
            http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0108.html

        [3] CVE - CVE-2012-6096
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6096

        [4] Nagios Core 3.x Version History
            http://www.nagios.org/projects/nagioscore/history/core-3x

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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