1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

X Server Security Disaster: "It's Worse Than It Looks"

X.Org

Published on 31 December 2013 03:46 PM EST
Written by Michael Larabel in X.Org
21 Comments

There's X.Org Server security vulnerabilities -- even for vulnerabilities going back two decades -- from time to time and in related components of the Linux graphics stack. Parts of the X.Org stack can be in fairly rough shape given the age of X11, but a very poor picture of it was painted at the Chaos Communication Congress. It was stated that the X.Org security is even worse than it looks.

At the 30th Chaos Communication Congress (CCC) last week in Germany, Ilja van Sprundel, a security researcher who previously reported X.Org vulnerabilities, gave a presentation. Covered in the presentation at the very well known CCC conference in Germany were client-side issues and then an entire half of the presentation devoted to the X.Org Server.

Among the quotes used were "GLX is a horrible demotivator! 80,000 lines of sheer terror." and "In the past couple of months I've found 120 bugs there, and I'm not close to done."

Those wanting to read more about the troubled state of the X.Org Server security can watch the CCC presentation video from the CCC.de web-site.

For those thinking its FUD or blown out of proportion, Oracle's Alan Coopersmith who has long been involved with X11/X.Org, was the one that originally shared this presentation on the xorg-devel list.

Alan added on the mailing list, "I think it's mostly accurate (there's a couple minor details to quibble with, and there's a bit about 10-15 minutes in everyone can fast forward through). His point about today's world being much different than when X was created, and nearly 30 year old hand written binary protocol parsing code not being the best idea, is much like the rationale for xcb's creation, but we've not been effective at getting transitioned to it. (We keep talking about using XCB to generate server-side protocol handling & byte swapping, but never have, and haven't made it possible for all the clients to move to XCB, since there's still a couple missing pieces.)"

Thankfully some of the issues should be addressed in moving to Wayland (or Mir). There's also ongoing bug-fixes and addressing of security issues in X.Org Server updates -- just last week X.Org Server 1.15 was released.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  2. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  3. AMD Radeon R9 285 Tonga Performance On Linux
  4. Apotop Wi-Copy
Latest Linux Articles
  1. AMD Moves Forward With Unified Linux Driver Strategy, New Kernel Driver
  2. MSI: Update Your BIOS From The Linux Desktop
  3. NVIDIA vs. AMD 2D Linux Drivers: Catalyst Is Getting Quite Good At 2D
  4. 15-Way GPU Comparison With Mesa 10.3 + Linux 3.17
Latest Linux News
  1. NVIDIA's NVPTX Support For GCC Is Close To Being Merged
  2. KDE's KWin On Wayland Begins Using Libinput
  3. Khronos Releases OpenVX 1.0 Specification
  4. Linux Kernel Working Towards GNU11/C11 Compatibility
  5. Ubuntu 15.04 Is Codenamed After A Monkey: Vivid Vervet
  6. Following GCC, Clang Looks To Default To C11
  7. Users/Developers Threatening Fork Of Debian GNU/Linux
  8. Linux 3.18-rc1 Released One Week Early With Many Changes
  9. The VC4 Gallium3D Driver Is Still Moving Along For The Raspberry Pi
  10. Direct3D 9 Support Might Land Within Mainline Mesa 3D Drivers
Latest Forum Discussions
  1. Users/Developers Threatening Fork Of Debian GNU/Linux
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux
  4. AMD Is Restructuring Again, Losing 7% Of Employees
  5. Bye bye BSD, Hello Linux: A Sys Admin's Story
  6. Open-Source AMD Fusion E-350 Support Takes A Dive
  7. Upgrade to Kaveri, very slow VDPAU performance
  8. ChromeOS Drops Support For EXT2/EXT3/EXT4 File-Systems