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.)

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
Five Emerging Security Threats - And What You Can Learn From Them
At Black Hat USA, researchers unveiled some nasty vulnerabilities. Is your organization ready?
Flash Poll
Dark Reading Strategic Security Report: The Impact of Enterprise Data Breaches
Dark Reading Strategic Security Report: The Impact of Enterprise Data Breaches
Social engineering, ransomware, and other sophisticated exploits are leading to new IT security compromises every day. Dark Reading's 2016 Strategic Security Survey polled 300 IT and security professionals to get information on breach incidents, the fallout they caused, and how recent events are shaping preparations for inevitable attacks in the coming year. Download this report to get a look at data from the survey and to find out what a breach might mean for your organization.
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2013-7445
Published: 2015-10-15
The Direct Rendering Manager (DRM) subsystem in the Linux kernel through 4.x mishandles requests for Graphics Execution Manager (GEM) objects, which allows context-dependent attackers to cause a denial of service (memory consumption) via an application that processes graphics data, as demonstrated b...

CVE-2015-4948
Published: 2015-10-15
netstat in IBM AIX 5.3, 6.1, and 7.1 and VIOS 2.2.x, when a fibre channel adapter is used, allows local users to gain privileges via unspecified vectors.

CVE-2015-5660
Published: 2015-10-15
Cross-site request forgery (CSRF) vulnerability in eXtplorer before 2.1.8 allows remote attackers to hijack the authentication of arbitrary users for requests that execute PHP code.

CVE-2015-6003
Published: 2015-10-15
Directory traversal vulnerability in QNAP QTS before 4.1.4 build 0910 and 4.2.x before 4.2.0 RC2 build 0910, when AFP is enabled, allows remote attackers to read or write to arbitrary files by leveraging access to an OS X (1) user or (2) guest account.

CVE-2015-6333
Published: 2015-10-15
Cisco Application Policy Infrastructure Controller (APIC) 1.1j allows local users to gain privileges via vectors involving addition of an SSH key, aka Bug ID CSCuw46076.

Dark Reading Radio
Archived Dark Reading Radio
Security researchers are finding that there's a growing market for the vulnerabilities they discover and persistent conundrum as to the right way to disclose them. Dark Reading editors will speak to experts -- Veracode CTO and co-founder Chris Wysopal and HackerOne co-founder and CTO Alex Rice -- about bug bounties and the expanding market for zero-day security vulnerabilities.