Re: odd chown difference between 2.0 and 2.1pre kernels

Brandon S. Allbery KF8NH (allbery@kf8nh.apk.net)
Mon, 11 Jan 1999 18:57:52 -0500

In message <m0zzjRk-0007U2C@the-village.bc.nu>, Alan Cox writes:
+-----
| > In message <19990109215152.C32046@kitenet.net>, Joey Hess writes:
| > | On a 2.1pre4 machine:
| > | root@kite:~>ls -l foo
| > | -rwsrw-r-- 1 root joey 0 Jan 9 17:13 foo*
| > | root@kite:~> chown root.root foo; ls -l foo
| > | -rwsrw-r-- 1 root root 0 Jan 9 17:13 foo*
| >
| > GAK!!! Security flaw here, methinks. chown should unconditionally clear
| > setuid and setgid.
|
| Except when done by root
+--->8

Especially when done by root, I'd think. Less risk of inadvertently opening
a security hole --- if I want the thing set[ug]id I should have to
explicitly make it so.

-- 
brandon s. allbery	[os/2][linux][solaris][japh]	 allbery@kf8nh.apk.net
system administrator	     [WAY too many hats]	   allbery@ece.cmu.edu
carnegie mellon / electrical and computer engineering			 KF8NH
     We are Linux. Resistance is an indication that you missed the point.






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