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== Contingency Plan == | == Contingency Plan == | ||
* Contingency mechanism: No Change | * Contingency mechanism: No Change | ||
* Contingency deadline: | * Contingency deadline: Beta Release | ||
* Blocks release? YES | * Blocks release? YES | ||
* Blocks product? Fedora 21 | * Blocks product? Fedora 21 | ||
Revision as of 14:05, 3 April 2014
The securetty file is empty by default
Summary
The securetty file is empty by default
Owner
- Name: quickbooks
- Email: quickbooks.office@gmail.com
- Release notes owner:
Current status
- Targeted release: Fedora 21
- Last updated: March 20, 2014
- Tracker bug: <will be assigned by the Wrangler>
Detailed Description
Method
Disabling root access via any console device (tty).
Description
An empty /etc/securetty file prevents root login on any devices attached to the computer.
Effects
Prevents access to the root account via the console or the network. The following programs are prevented from accessing the root account:login, gdm, kdm, xdm, Other network services that open a tty
Does Not Affect
Programs that do not log in as root, but perform administrative tasks through setuid or other mechanisms. The following programs are not prevented from accessing the root account: su, sudo, ssh, scp, sftp
More Details
To further limit access to the root account, administrators can disable root logins at the console by editing the /etc/securetty file. This file lists all devices the root user is allowed to log into. If the file does not exist at all, the root user can log in through any communication device on the system, whether via the console or a raw network interface. This is dangerous, because a user can log in to his machine as root via Telnet, which transmits the password in plain text over the network. By default, Fedora's /etc/securetty file only allows the root user to log in at the console physically attached to the machine. To prevent root from logging in, remove the contents of this file by typing the following command: echo > /etc/securetty
Warning: A blank /etc/securetty file does not prevent the root user from logging in remotely using the OpenSSH suite of tools because the console is not opened until after authentication.
Benefit to Fedora
Fedora will become more secure by default, out of the box, especially for people who don't read the documentation.
Scope
- Proposal owners: YES
echo > /etc/securetty
- Other developers: YES
echo > /etc/securetty
- Release engineering: YES
echo > /etc/securetty
- Policies and guidelines: YES
The Security Document mentioned above will need to be updated. https://docs.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/chap-Security_Guide-Securing_Your_Network.html#tabl-Security_Guide-Disallowing_Root_Access-Methods_of_Disabling_the_Root_Account
Upgrade/compatibility impact
This change should be only for new installs, that is the Fedora 21 ISO images.
How To Test
1. vi /etc/securetty 2. Make sure it is empty
User Experience
One less work to secure Fedora after a fresh install.
Dependencies
NO
Contingency Plan
- Contingency mechanism: No Change
- Contingency deadline: Beta Release
- Blocks release? YES
- Blocks product? Fedora 21
Documentation
The Security Document mentioned above will need to be updated. https://docs.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/chap-Security_Guide-Securing_Your_Network.html#tabl-Security_Guide-Disallowing_Root_Access-Methods_of_Disabling_the_Root_Account
Release Notes
The Security Document mentioned above will need to be updated. https://docs.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/chap-Security_Guide-Securing_Your_Network.html#tabl-Security_Guide-Disallowing_Root_Access-Methods_of_Disabling_the_Root_Account