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. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  2. Sumo's Omni Gets Reloaded
  3. AMD A10-7800 & A6-7400K APUs Run Great On Linux
  4. Radeon Gallium3D Is Running Increasingly Well Against AMD's Catalyst Driver
Latest Linux Articles
  1. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
  2. CPUFreq Scaling Tests With AMD's Kaveri On Linux 3.16
  3. Enabling HyperZ Is Still An Easy Way For Faster RadeonSI Performance
  4. AMD Kaveri: Catalyst vs. RadeonSI Gallium3D On Linux
Latest Linux News
  1. GNOME 3.14 Beta Makes GLSL Optional, Supports Wayland Gesture/Touch Events
  2. KDE Software Compilation 4.14 Released
  3. The Many Things You Can Build With A Raspberry Pi
  4. AMD's Catalyst Linux Driver Preparing For A World Without An X Server?
  5. Khronos Publishes Its Slides About OpenGL-Next
  6. Qt5 Will Now Support LGPLv3 Modules
  7. Proposed: A Tainted Performance State For The Linux Kernel
  8. Systemd 216 Piles On More Features, Aims For New User-Space VT
  9. Mesa 10.2.6 Has Plenty Of OpenGL Driver Bug Fixes
  10. LXQt 0.8 Is Being Released Soon
Latest Forum Discussions
  1. Remote gui not accessible in Phoronix Test Suite 5.2
  2. The dangers of Linux kernel development
  3. Dead Island for Linux (?)
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. AMD Offers Mantle For OpenGL-Next, Pushes Mantle To Workstations
  6. Next-Gen OpenGL To Be Announced Next Month
  7. OpenGL 4.5 Released With New Features
  8. Updated graphics drivers for Ubuntu 12.04 Precise LTS