 | | | chmod +s not working as expected | chmod +s not working as expected 2003-11-27 - By James Ho
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nope... does not work.
-- -- Original Message -- --
From: Cameron Simpson
To: valhalla-list@(protected)
Sent: Thursday, November 27, 2003 3:19 PM
Subject: Re: chmod +s not working as expected
On 14:45 27 Nov 2003, James Ho <james.ho@(protected)> wrote:
| I just transported a program from Red Hat Linux 6.2 to Red Hat Linux 7.3.
| The C program has a line stating:
| system ("whoami");
|
| The permission of the executable is 6777 (ie. -rwsrwsrwx) and the
| owner of the program is "user1".
|
| Using another user login "user99", I execute the program in both Red Hat
| Linux 6.2 and 7.3.
| In 6.2, I get the output "user1"
| In 7.3, I get the output "user99"
|
| Why is this? Is there any way I can get the program work as it did
| in Red Hat Linux 6.2?
I can imagine the kernel not allowing setuid to work on a publicly
writable file. The 7.3 box will have a newer (==> maybe more paranoid)
kernel. Try making the permissions 6555 or 6111 and see how it behaves.
Cheers,
--
Cameron Simpson <cs@(protected)> DoD#743
http://www.cskk.ezoshosting.com/cs/
If you 'aint falling off, you ar'nt going hard enough. - Fred Gassit
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<DIV><FONT face=Arial size=2>nope... does not work.</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
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<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=cs@(protected) href="mailto:cs@(protected)">Cameron Simpson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=valhalla-list@(protected)
href="mailto:valhalla-list@(protected)">valhalla-list@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, November 27, 2003 3:19
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: chmod +s not working as
expected</DIV>
<DIV><BR></DIV>On 14:45 27 Nov 2003, James Ho <<A
href="mailto:james.ho@(protected)">james.ho@(protected)</A>>
wrote:<BR>| I just transported a program from Red Hat Linux 6.2 to Red Hat
Linux 7.3.<BR>| The C program has a line
stating:<BR>| system
("whoami");<BR>| <BR>| The permission of the executable is 6777 (ie.
-rwsrwsrwx) and the<BR>| owner of the program is "user1".<BR>| <BR>| Using
another user login "user99", I execute the program in both Red Hat <BR>|
Linux
6.2 and 7.3.<BR>| In 6.2, I get the output
"user1"<BR>| In 7.3, I get the output "user99"<BR>|
<BR>| Why is this? Is there any way I can get the program work as it did<BR>|
in Red Hat Linux 6.2?<BR><BR>I can imagine the kernel not allowing setuid to
work on a publicly<BR>writable file. The 7.3 box will have a newer (==>
maybe more paranoid)<BR>kernel. Try making the permissions 6555 or 6111 and
see how it behaves.<BR><BR>Cheers,<BR>-- <BR>Cameron Simpson <<A
href="mailto:cs@(protected)">cs@(protected)</A>> DoD#743<BR><A
href="http://www.cskk.ezoshosting.com/cs/">http://www.cskk.ezoshosting.com/cs
/</A><BR><BR>If
you 'aint falling off, you ar'nt going hard enough. - Fred
Gassit<BR><BR><BR>__ ____ ____ ____ ____ ____ ____ ____ ____ ____<BR>Valhalla
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