[vox-tech] Running a suid root perl script

[Mike Simons]

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On Sat, May 03, 2003 at 08:08:45AM -0700, Ken Herron wrote:
> --On Saturday, May 03, 2003 07:34:01 AM -0700 Henry House=20
> <hajhouse@houseag.com> wrote:
>=20
> >I created suid.pl as
> >
> >	#!/usr/bin/sperl5.8.0 -T
> >	print $ENV{"USER"}."\n";
>=20
> USER is just a string in the process's environment. It isn't=20
> automatically updated when you run a setuid program. Try having the perl=
=20
> script print its real and effective UIDs, or create a file and see what=
=20
> ID owns it.

  Ken is right about the "USER" environment variable not changing... the
environment is independent of the process permissions.

Seems to work here...=20

msimons@moria:~$ cat s
#! /usr/bin/sperl5.6.1 -w

print "$<, $>, $(, $)\n";

unlink "s.test";
open FILE, "> s.test";
close FILE;
msimons@moria:~$ ls -l s
-r-sr-xr-x    1 root     msimons       106 May  5 14:29 s
msimons@moria:~$ ./s
1000, 0, 1000 33 4 1000, 1000 33 4 1000
msimons@moria:~$ ls -l s.test
-rw-r--r--    1 root     msimons         0 May  5 14:29 s.test

--=20
GPG key: http://simons-clan.com/~msimons/gpg/msimons.asc
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