Re: Kernel 2.3.49/51 and exec permissions
On Sun, Mar 12, 2000 at 06:20:30PM -0500, Bob Hilliard wrote: The Doctor What [EMAIL PROTECTED] writes: but not if I try to sudo to a non-root id (this is as root, note the #): bash-2.04# sudo -u man bash sudo: unable to exec /bin/bash: Permission denied This doesn't affect your main question, but you are using the wrong syntax for sudo. The -u option takes a username/uid argument. Your command is telling sudo to run bash as user man, who doesn't exist. sudo is normally run by a user (not root) who is listed in the file /etc/sudoers. debian has man as uid number 6.
Re: Kernel 2.3.49/51 and exec permissions
The Doctor What [EMAIL PROTECTED] writes: but not if I try to sudo to a non-root id (this is as root, note the #): bash-2.04# sudo -u man bash sudo: unable to exec /bin/bash: Permission denied This doesn't affect your main question, but you are using the wrong syntax for sudo. The -u option takes a username/uid argument. Your command is telling sudo to run bash as user man, who doesn't exist. sudo is normally run by a user (not root) who is listed in the file /etc/sudoers. Your sudo problems don't appear to be related to your suid problems. Bob -- _ |_) _ |_ Robert D. Hilliard[EMAIL PROTECTED] |_) (_) |_) Palm City, FL USAPGP Key ID: A8E40EB9
Re: Kernel 2.3.49/51 and exec permissions
* Bob Hilliard ([EMAIL PROTECTED]) [000313 07:44]: The Doctor What [EMAIL PROTECTED] writes: but not if I try to sudo to a non-root id (this is as root, note the #): bash-2.04# sudo -u man bash sudo: unable to exec /bin/bash: Permission denied This doesn't affect your main question, but you are using the wrong syntax for sudo. The -u option takes a username/uid argument. Your command is telling sudo to run bash as user man, who doesn't exist. sudo is normally run by a user (not root) who is listed in the file /etc/sudoers. I'm sorry, but that is exactly what I was trying to do. Show that I can become any user other than root. Here is the same command working on a system without these problems: gerf, 3:02PM Mon 13 sudo -u man bash Password: bash-2.03$ id uid=6(man) gid=100(users) groups=100(users) But thanks for trying to help. Ciao! -- The wheel is turning but the hamster is dead. The Doctor What: What, Doctor What http://docwhat.gerf.org/ [EMAIL PROTECTED] KF6VNC
Kernel 2.3.49/51 and exec permissions
Just so you know, I've been searching *everywhere* for info on this and it's driving me nuts! I've been following debian unstable for a while. Currently that's 'woody'. I reciently upgraded my kernel from on old 2.3.3x (35 I think) to 2.3.49, complete with devfs configured. Since then, if I run the 2.3.49 kernel, I can run *any* setuid programs. /usr/lib/man-db/man (which is the real, setuid binary for man) produces the following behavior: - bash-2.04$ ls -al /usr/lib/man-db/man -rwsr-xr-x1 man root82752 Feb 29 00:27 /usr/lib/man-db/man bash-2.04$ id uid=1000(docwhat) gid=1000(docwhat) groups=1000(docwhat),20(dialout),24(cdrom),25(floppy),29(audio),30(dip),37(operator),50(staff) bash-2.04$ /usr/lib/man-db/man /usr/lib/man-db/man: error in loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory bash-2.04$ sudo bash bash-2.04# /usr/lib/man-db/man /usr/lib/man-db/man: error in loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory bash-2.04# strace /usr/lib/man-db/man strace: exec: Permission denied execve(/usr/lib/man-db/man, [/usr/lib/man-db/man], [/* 58 vars */]) = 0 bash-2.04# gdb --quiet /usr/lib/man-db/man GNU gdb 19990928 Copyright 1998 Free Software Foundation, Inc. (no debugging symbols found)... (gdb) run Starting program: /usr/lib/man-db/man /usr/lib/man-db/man: error in loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory Program exited with code 0177. (gdb) quit - This isn't true just of man, btw. It's true of *all* setuid/setgid programs that aren't setuid/setgid root. As you can see, sudo works, but not if I try to sudo to a non-root id (this is as root, note the #): bash-2.04# sudo -u man bash sudo: unable to exec /bin/bash: Permission denied I hope someone can throw some light on this, it's driving me nuts and I can't find anyone else reporting similar problems! Kernel info: 2.3.49 and 2.3.51 compiled for a K6-2 AMD with gcc 2.95.2 Ciao! -- Home is where you wear your hat. --Dr. Emilio Lizardo (Adventures of Buckaroo Banzai) The Doctor What: Second Baseman http://docwhat.gerf.org/ [EMAIL PROTECTED] KF6VNC
