[UNIX] Progress Database dbagent Security Vulnerability

From: SecuriTeam (support_at_securiteam.com)
Date: 06/15/03

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Date: 15 Jun 2003 22:21:20 +0200

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      Progress Database dbagent Security Vulnerability
    ------------------------------------------------------------------------

    SUMMARY

    Progress applications make the use of several helper .DLL and .so
    binaries. When looking for shared object files _dbagent looks at the
    argument passed to the command line option "-installdir". No verification
    is performed upon the object that is located thus local non super users
    can make themselves root.

    DETAILS

    Vulnerable systems:
     * Progress Database versions 9.1 up to 9.1D06

    This vulnerability is a rehash of
    <http://www.securiteam.com/unixfocus/5DP0C1FAAI.html>
    SRT2003-06-13-0945.txt with the difference being the method by which the
    application determines where the dlopen() should search.

    Example:
    elguapo@rh8 9.1C]$ cat /usr/dlc/version
    echo PROGRESS Version 9.1C as of Thu Jun 7 10:03:59 EDT 2001

    Here we are using "-installdir /tmp" as the options to _dbagent

    snprintf("/tmp/lib/librocket_r.so",303,"%s/lib/%s","/tmp","librocket_r.so")
    memset(0xbfffece0, '\000', 303) = 0xbfffece0
    strncpy(0xbfffece0, "/tmp/lib/librocket_r.so", 303) = 0xbfffece0
    dlopen("/tmp/lib/librocket_r.so", 257
    This is a fake _init in the fake libjutil.so
    uid=0(root) gid=500(elguapo) groups=500(elguapo)

    Workaround:
    A valid workaround to nearly any Progress security hole is to remove the
    suid bit from all binaries

    i.e. run the following command:
    #chmod -s /usr/dlc/bin/_dbagent

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:dotslash@snosoft.com> KF.

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