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SubjectAre setuid #!/foo/bar scripts secure in Linux ?
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- From the perlsec(1):


There are some systems on which setuid scripts are free of
this inherent security bug. For example, recent releases
of Solaris are like this. On such systems, when the
kernel passes the name of the setuid script to open to the
interpreter, rather than using a pathname subject to
mettling, it instead passes /dev/fd/3. This is a special
file already opened on the script, so that there can be no
race condition for evil scripts to exploit. On these
systems, Perl should be compiled with
-DSETUID_SCRIPTS_ARE_SECURE_NOW. The Configure program
that builds Perl tries to figure this out for itself.


Is this the case on Linux, if not can we "make it so" in the 2.1.x series?




- --
Darren J Moffat

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