Bugtraq mailing list archives
Re: vlock vulnerability in RedHat 7.0
From: Trond Eivind Glomsrød <teg () REDHAT COM>
Date: Tue, 7 Nov 2000 15:04:30 -0500
Bartlomiej Grzybicki <bgrzybicki () morliny pl> writes:
I've tried to lock all virtual consoles in RedHat 7.0 using vlock, which is delivered with this release of RedHat. If user root locks all consoles - it's no problem, but if normal user locks consoles then anybody can unlock without typing a password. Try to use it in the following way: 1. logon as an ordinary user on tty1 2. logon as root on tty2 3. Type on tty1 vlock -a 4. All consoles will be locked. 5. When vlock asks for password press ENTER and don't release the key until you see message 'broken pipe'. 6. If you see it all two consoles are unlocked.
How is your system configured? I can't reproduce this. -- Trond Eivind Glomsrød Red Hat, Inc.
Current thread:
- vlock vulnerability in RedHat 7.0 Bartlomiej Grzybicki (Nov 08)
- Re: vlock vulnerability in RedHat 7.0 Trond Eivind Glomsrød (Nov 09)
- Re: vlock vulnerability (solution: w00w00's CAP) Matt Conover (Nov 09)
- Re: vlock vulnerability in RedHat 7.0 Jon Lewis (Nov 09)
- Re: vlock vulnerability in RedHat 7.0 Luca Berra (Nov 09)
- <Possible follow-ups>
- Re: vlock vulnerability in RedHat 7.0 Vladislav V. Mikhailov (Nov 09)