Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

7/8/2011
05:54 PM
Connect Directly
Google+
LinkedIn
Twitter
RSS
E-Mail
50%
50%

Google Implements WebGL Security Fix

Web developers wishing to make use of cross-domain media elements with WebGL should look to a new mechanism called CORS.

Google this week said that a security enhancement in the WebGL specification has limited the use of cross-domain image or video elements as WebGL textures in Chrome 13, and encouraged developers to utilize a specification known as CORS.

The explanatory post to the Chromium blog confirms what Google software engineer Kenneth Russell said about Chrome 13 in a mailing list message last month.

Chrome 13 is currently available to those subscribed to Google's beta channel; Chrome 12 is the stable release.

Microsoft last month took the unusual step of publicly condemning WebGL, an open alternative to its Windows DirectX graphics API, because of what it saw as potential security problems. "In its current form, WebGL is not a technology Microsoft can endorse from a security perspective," the company said, in a blog post titled "WebGL Considered Harmful."

The WebGL specification has since been revised to disallow the use of cross-domain media.

WebGL provides hardware-accelerated 3-D graphics in the browser without a plug-in. It is a critical component to browser makers aiming to support entertainment and graphics applications that compete with the sophisticated graphics capabilities of desktop apps. Google currently hosts an online showcase to illustrate the potential of the technology.

A spokesperson from The Khronos Group, which published the WebGL 1.0 specification in March, said last month that browser vendors are still working to make their WebGL implementations conform with the specification.

The group's spokesperson also addressed Microsoft's concern about denial-of-service attacks that could arise from shaders and geometry designed to crash graphics hardware.

"Browser vendors are still in the process of supporting the GL_ARB_robustness extension, so it is expected that the previously reported denial-of-service issues are still present," Khronos' spokesperson said. "It is expected that the reported denial-of-service issues will be solved with the integration of this extension."

Even as the WebGL security issues get ironed out, the changes in Chrome 13 have not completely eliminated the possibility of utilizing cross-domain media elements. Assuming the hosting image server allows it, a Web developer can employ a specification known as CORS (Cross-Origin Resource Sharing) to present images and videos that come from other domains.

"Unfortunately, this new restriction in WebGL means that some existing content will break," explained Google developer advocate Eric Bidelman in a blog post. "We've already started working with external image and video hosting services like Flickr to evangelize the use of CORS on their images."

Picasa, Google's online image service, already supports CORS.

In the new, all-digital Dark Reading supplement: What industry can teach government about IT innovation and efficiency. Also in this issue: Federal agencies have to shift from annual IT security assessments to continuous monitoring of their risks. Download it now. (Free registration required.)

 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 8/3/2020
Pen Testers Who Got Arrested Doing Their Jobs Tell All
Kelly Jackson Higgins, Executive Editor at Dark Reading,  8/5/2020
New 'Nanodegree' Program Provides Hands-On Cybersecurity Training
Nicole Ferraro, Contributing Writer,  8/3/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
Special Report: Computing's New Normal, a Dark Reading Perspective
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
The Changing Face of Threat Intelligence
The Changing Face of Threat Intelligence
This special report takes a look at how enterprises are using threat intelligence, as well as emerging best practices for integrating threat intel into security operations and incident response. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15820
PUBLISHED: 2020-08-08
In JetBrains YouTrack before 2020.2.6881, the markdown parser could disclose hidden file existence.
CVE-2020-15821
PUBLISHED: 2020-08-08
In JetBrains YouTrack before 2020.2.6881, a user without permission is able to create an article draft.
CVE-2020-15823
PUBLISHED: 2020-08-08
JetBrains YouTrack before 2020.2.8873 is vulnerable to SSRF in the Workflow component.
CVE-2020-15824
PUBLISHED: 2020-08-08
In JetBrains Kotlin before 1.4.0, there is a script-cache privilege escalation vulnerability due to kotlin-main-kts cached scripts in the system temp directory, which is shared by all users by default.
CVE-2020-15825
PUBLISHED: 2020-08-08
In JetBrains TeamCity before 2020.1, users with the Modify Group permission can elevate other users' privileges.