Click here to learn
about this Sponsor:
Home  |  News  |  Articles  |  Polls  |  Forum

Keywords: Match:
U.S. National Security Agency develops 'Security-Enhanced Linux'
Nov. 05, 2002

From the NSA website . . .

As part of its Information Assurance mission, the National Security Agency (NSA) has long been involved with the computer security research community in investigating a wide range of computer security topics including operating system security. Recognizing the critical role of operating system security mechanisms in supporting security at higher levels, researchers from the NSA's Information Assurance Research Group have been investigating an architecture that can provide the necessary security functionality in a manner that can meet the security needs of a wide range of computing environments.

End systems must be able to enforce the separation of information based on confidentiality and integrity requirements to provide system security. Operating system security mechanisms are the foundation for ensuring such separation. Unfortunately, existing mainstream operating systems lack the critical security feature required for enforcing separation: mandatory access control. As a consequence, application security mechanisms are vulnerable to tampering and bypass, and malicious or flawed applications can easily cause failures in system security.

The results of several previous research projects in this area have been incorporated in a security-enhanced Linux system. This version of Linux has a strong, flexible mandatory access control architecture incorporated into the major subsystems of the kernel. The system provides a mechanism to enforce the separation of information based on confidentiality and integrity requirements. This allows threats of tampering and bypassing of application security mechanisms to be addressed and enables the confinement of damage that can be caused by malicious or flawed applications.

Linux was chosen as the platform for this work because its growing success and open development environment provided an opportunity to demonstrate that this functionality can be successful in a mainstream operating system and, at the same time, contribute to the security of a widely used system. Additionally, the integration of these security research results into Linux may encourage additional operating system security research that may lead to additional improvement in system security.

This work is not intended as a complete security solution for Linux. Security-enhanced Linux is not an attempt to correct any flaws that may currently exist in Linux. Instead, it is simply an example of how mandatory access controls that can confine the actions of any process, including a superuser process, can be added into Linux. The focus of this work has not been on system assurance or other security features such as security auditing, although these elements are also important for a secure system.

The security mechanisms implemented in the system provide flexible support for a wide range of security policies. They make it possible to configure the system to meet a wide range of security requirements. The release includes a general-purpose security policy configuration designed to meet a number of security objectives as an example of how this may be done. The flexibility of the system allows the policy to be modified and extended to customize the security policy as required for any given installation.

There is still much work needed to develop a complete security solution. In addition, due to resource limitations, we have not yet been able to evaluate and optimize the performance of the security mechanisms. Currently, we can only support the x86 architecture and have only been able to test it on Red Hat distributions. Nonetheless, we feel we have presented a good starting point to bring valuable security features to Linux. We are looking forward to building upon this work with the Linux community.

Security-enhanced Linux is being released under the same terms and conditions as the original sources. The release includes documentation and source code for both the system and some system utilities that were modified to make use of the new features. Participation with comments, constructive criticism, and/or improvements is welcome.

Download SELinux here

Information on how to obtain a free 3-disk copy of the beta version of SELinux is available from the OSD group.



Related resources:


Related stories:



(Click here for further information)


FUEL Database on MontaVista Linux
Whether building a mobile handset, a car navigation system, a package tracking device, or a home entertainment console, developers need capable software systems, including an operating system, development tools, and supporting libraries, to gain maximum benefit from their hardware platform and to meet aggressive time-to-market goals.

Breaking New Ground: The Evolution of Linux Clustering
With a platform comprising a complete Linux distribution, enhanced for clustering, and tailored for HPC, Penguin Computing¿s Scyld Software provides the building blocks for organizations from enterprises to workgroups to deploy, manage, and maintain Linux clusters, regardless of their size.

Data Monitoring with NightStar LX
Unlike ordinary debuggers, NightStar LX doesn¿t leave you stranded in the dark. It¿s more than just a debugger, it¿s a whole suite of integrated diagnostic tools designed for time-critical Linux applications to reduce test time, increase productivity and lower costs. You can debug, monitor, analyze and tune with minimal intrusion, so you see real execution behavior. And that¿s positively illuminating.

Virtualizing Service Provider Networks with Vyatta
This paper highlights Vyatta's unique ability to virtualize networking functions using Vyatta's secure routing software in service provider environments.

High Availability Messaging Solution Using AXIGEN, Heartbeat and DRBD
This white paper discusses a high-availability messaging solution relying on the AXIGEN Mail Server, Heartbeat and DRBD. Solution architecture and implementation, as well as benefits of using AXIGEN for this setup are all presented in detail.

Understanding the Financial Benefits of Open Source
Will open source pay off? Open source is becoming standard within enterprises, often because of cost savings. Find out how much of a financial impact it can have on your organization. Get this methodology and calculator now, compliments of JBoss.

Embedded Hardware and OS Technology Empower PC-Based Platforms
The modern embedded computer is the jack of all trades appearing in many forms.

Data Management for Real-Time Distributed Systems
This paper provides an overview of the network-centric computing model, data distribution services, and distributed data management. It then describes how the SkyBoard integration and synchronization service, coupled with an implementation of the OMG¿s Data Distribution Service (DDS) standard, can be used to create an efficient data distribution, storage, and retrieval system.

7 Advantages of D2D Backup
For decades, tape has been the backup medium of choice. But, now, disk-to-disk (D2D) backup is gaining in favor. Learn why you should make the move in this whitepaper.

 


Got a HOT tip?   please tell us!
Free weekly newsletter
Enter your email...
Click here for a profile of each sponsor:
PLATINUM SPONSORS
(Become a sponsor)

ADVERTISEMENT
(Advertise here)

Check out the latest Linux powered...

Mobile phones!

MIDs, UMPCs
& tablets

Mobile devices

Other cool
gadgets



BREAKING NEWS

• Die-shrunk x86 SoC draws 2 Watts at 1GHz
• Webinars explore RTOS-to-Linux driver migration
• Open phone goes robotic
• MontaVista touts Android readiness
• USB Linux key targets netbooks
• Via panel PC resists shock, liquids
• Linux provider touts support award
• World's smallest humanoid robot can run Linux
• Linux connects TVs to 'Net video
• Mot camera-phone runs widgets
• Linux-ready MILS kernel gains POSIX
• Multimedia processor plays H.264 video
• $7 ARM9 SoC gains mainline support
• Mini-ITX board has HDMI port
• Papers sought for Embedded Linux Conference


Most popular stories -- past 90 days:
• Open source phone goes mass-market
• Tinest Linux system, yet?
• Garmin Nav devices run Gnome Linux
• ARM9 board boots Debian in 0.69 seconds
• Low-cost laptop runs Linpus Linux
• Linux-friendly Beagle fetches $150
• Mini Linux PC breaks $100 barrier
• Open source camera records geotagged video to SATA HDD
• Open set-top box ships
• First $100 laptop runs Linux


DesktopLinux headlines:
• "Moonlight" ready to shine
• Adobe unleashes 64-bit Flash
• Debian Lenny installer arrives
• Ubuntu announces ARM port
• Amazon offers Linux XOs
• Windows 7 "no threat" to netbook Linux
• Creative frees Sound Blaster driver code
• Linux, netbooks threaten Microsoft's fat profits
• Ibex inspires GNOME switch
• Linux to outship Windows in 2009?


Also visit our sister site:


Sign up for LinuxDevices.com's...

news feed

Home  |  News  |  Articles  |  Polls  |  Forum  |  About  |  Contact
 

Ziff Davis Enterprise Home | Contact Us | Advertise | Link to Us | Reprints | Magazine Subscriptions | Newsletters
Tech RSS Feeds | White Papers | ROI Calculators | Tech Podcasts | Tech Video | VARs | Channel News

Baseline | Careers | Channel Insider | CIO Insight | DesktopLinux | DeviceForge | DevSource | eSeminars |
eWEEK | Enterprise Network Security | LinuxDevices | Linux Watch | Microsoft Watch | Mid-market | Networking | PDF Zone |
Publish | Security IT Hub | Strategic Partner | Web Buyer's Guide | Windows for Devices

Developer Shed | Dev Shed | ASP Free | Dev Articles | Dev Hardware | SEO Chat | Tutorialized | Scripts |
Code Walkers | Web Hosters | Dev Mechanic | Dev Archives | igrep

Use of this site is governed by our Terms of Service and Privacy Policy. Except where otherwise specified, the contents of this site are copyright © 1999-2008 Ziff Davis Enterprise Holdings Inc. All Rights Reserved. Reproduction in whole or in part in any form or medium without express written permission of Ziff Davis Enterprise is prohibited. Linux is a registered trademark of Linus Torvalds. All other marks are the property of their respective owners.