Java brews critical bug

Java bug can leave corporate systems open to attack

A bug in the Java Runtime Environment (JRE) can leave corporate systems open to attack if a user visits a site containing malicious code, security researchers have warned.

The bug affects Windows, Linux and Solaris, and Sun has released a patch.

The JRE includes the Java Virtual Machine and supporting executables and files, and contains safeguards that prevent applets from causing trouble on the wider system. The newly disclosed flaw allows applets to upgrade their privileges, effectively giving them free access to the rest of the system, Sun said in an advisory.

"For example, an applet may grant itself permissions to read and write local files or execute local applications with the privileges of the user running the untrusted applet," Sun said.

The specific bug is to do with the processing of GIF image components, according to the Zero Day Initiative (ZDI), a bounty-oriented program run by 3Com's TippingPoint, which bought rights to disclosure from an anonymous researcher.

"When the image width in an image block of a valid GIF file is set to 0, the Java runtime will allocate the specified size but subsequently copy all data to the under allocated memory chunk," ZDI said in its advisory. "The overflow results in the corruption of multiple pointers, at least one of which is later dereferenced and can therefore result in execution of arbitrary code."

ZDI originally informed Sun of the problem back in June, the organization said.

Secunia, a third-party security company based in Denmark, said the problem was one of the most serious to have affected Java in some time. Secunia said the bug was "highly critical".

The bug affects Java Development Kit (JDK) and JRE 5.0 Update 9 and prior, Java Software Development Kit (SDK) and JRE 1.4.2_12 and prior, and SDK and JRE 1.3.1_18 and prior.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Matthew Broersma

Techworld.com
Show Comments

Cool Tech

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Breitling Superocean Heritage Chronographe 44

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?