Security issues with universal access of file

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06-02-2011

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Security issues with universal access of file

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1. The problem statement, all variables and given/known data:

If you look at the permissions associated with a symbolic link, it has universal access. Does this lead to security issues? Why?

VI editor chapter

i created a file with the vi filename and use umask 022 umask066 to check the permission of the file.

Last edited by linux17; 06-02-2011 at 05:01 PM..

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LEARN ABOUT SUNOS

mktemp

mktemp(3C)						   Standard C Library Functions 						mktemp(3C)

NAME

       mktemp - make a unique file name  from a template

SYNOPSIS

       #include <stdlib.h>

       char *mktemp(char *template);

DESCRIPTION

       The  mktemp() function replaces the contents of the string pointed to by template with a unique file name, and returns template. The string
       in template should look like a file name with six trailing 'X's; mktemp() will replace the 'X's with a character string that can be used to
       create a unique file name. Only 26 unique file names per thread can be created for each unique template.

RETURN VALUES

       The mktemp() function returns the pointer template. If a unique name cannot be created, template points to a null string.

ERRORS

       No errors are defined.

EXAMPLES

       Example 1: Generate a filename.

       The  following example replaces the contents of the "template" string with a 10-character filename beginning with the characters "file" and
       returns a pointer to the "template" string that contains the new filename.

       #include <stdlib.h>
       ...
       char *template = "/tmp/fileXXXXXX";
       char *ptr;
       ptr = mktemp(template);

USAGE

       Between the time a pathname is created and the file opened, it is possible for some other process to create a file with the same name.  The
       mkstemp(3C) function avoids this problem and is preferred over this function.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mkstemp(3C), tmpfile(3C), tmpnam(3C), attributes(5), standards(5)

SunOS 5.10							    15 Sep 2004 							mktemp(3C)

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