Child Killing Parent Post: 302295625

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LEARN ABOUT HPUX

secure_sid_scripts

secure_sid_scripts(5)						File Formats Manual					     secure_sid_scripts(5)

NAME

       secure_sid_scripts - controls whether setuid and setgid bits on scripts are honored

VALUES

   Failsafe
   Default
   Allowed values
   Recommended values
DESCRIPTION

       This  tunable  controls	whether and bits on executable scripts have any effect.  Honoring on scripts make a system vulnerable to attack by
       malicious users.

       The default value for this variable is 1, indicating that bits are to be ignored by the execve(2) system call  for  higher  security.   The
       tunable	can  be set to 0 for a compatibility with older releases at the expense of security.  Hewlett-Packard strongly recommends that you
       not change the value of this tunable unless there is an urgent need to do so.

       When a script with bits is executed, the kernel generates the following error message to both the terminal controlling and the system  log.
       (To view the error message, use dmesg(1M) or inspect

   Who is Expected to Change This Tunable?
       Administrator.

   Restrictions on Changing
       Changes to this tunable take effect for new scripts started after the change.

   When Should the Value of This Tunable Be Changed?
       This  tunable  controls	operational  modes  rather  than data structure sizes and limits.  The appropriate setting for a system depends on
       whether you consider security or compatibility to be most important.

       A value of is compatible with previous releases of HP-UX, but it is also less secure.

       A value of provides security against race condition attacks exploiting scripts.

   What Are the Side Effects of Changing the Value
       This tunable controls only executable scripts (not programs) with bit set.  HP-UX does not ship with any such  scripts.	 If  the  customer
       wishes  to use scripts, third party applications such as or can be used.  Alternatively, the shell script can be wrapped in a simple C pro-
       gram that runs the shell script with appropriate permissions:

   What Other Tunable Values Should Be Changed at the Same Time?
       None.

WARNINGS

       None.  All HP-UX kernel tunable parameters are release specific.  This parameter may be removed or  have  its  meaning  changed	in  future
       releases of HP-UX.

       Installation  of  optional  kernel  software, from HP or other vendors, may cause changes to tunable parameter values.  After installation,
       some tunable parameters may no longer be at the default or recommended values.  For information about the effects of installation  on  tun-
       able  values,  consult  the documentation for the kernel software being installed.  For information about optional kernel software that was
       factory installed on your system, see at

FILES

AUTHOR

       was developed by HP.

SEE ALSO

       chmod(1), execve(2), kctune(1M).

							     Tunable Kernel Parameters					     secure_sid_scripts(5)

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