Feeds

Firefox fix lances memory corruption bug

Unload update stars in weekend patch release

Internet Security Threat Report 2014

Firefox users need to update their browser software following the discovery of multiple vulnerabilities.

The flaws might be exploited to bypass security restrictions, conduct cross-site scripting or spoofing attacks, pinch sensitive information, or even gain control of vulnerable systems.

The flaws affect both the 1.5 and newer 2.0 releases of the popular open source browser. Users are advised to update to versions 2.0.0.2 or 1.5.0.10 to guard against attack. Users of the SeaMonkey also need to update to version 1.0.8 because of the same set of problems.

The most serious of the flaws fixed by the updates involves a failure to properly handle JavaScript onUnload events. This creates a risk of memory corruption in cases where a user is duped into visiting a maliciously-constructed website or viewing HTML in a hostile spam email, for example. The ruse, which might be used to trick a user into executing arbitrary code.

The Mozilla Foundation advises users to disable JavaScript as a workaround in cases where a new version of the browser can't be immediately installed.

An error in the Network Security Services (NSS) code involved in processing SSLv2 server messages might also be used to inject hostile code onto vulnerable systems running 1.5 versions of Firefox.

Mozilla isn't alone in having problems with onUnload coding, a feature security watchers have tagged as a security calamity waiting to happen for some time, the SANS Institute's Internet Storm Centre reports.

Internet Explorer 7's handling of "onunload" events might be exploited by a malicious website to spoof the address bar, security notification firm Secunia warns, in a vulnerability it describes as "less critical". ®

Internet Security Threat Report 2014

More from The Register

next story
George Clooney, WikiLeaks' lawyer wife hand out burner phones to wedding guests
Day 4: 'News'-papers STILL rammed with Clooney nuptials
Shellshock: 'Larger scale attack' on its way, warn securo-bods
Not just web servers under threat - though TENS of THOUSANDS have been hit
Apple's new iPhone 6 vulnerable to last year's TouchID fingerprint hack
But unsophisticated thieves need not attempt this trick
PEAK IPV4? Global IPv6 traffic is growing, DDoS dying, says Akamai
First time the cache network has seen drop in use of 32-bit-wide IP addresses
Oracle SHELLSHOCKER - data titan lists unpatchables
Database kingpin lists 32 products that can't be patched (yet) as GNU fixes second vuln
Who.is does the Harlem Shake
Blame it on LOLing XSS terroristas
Researchers tell black hats: 'YOU'RE SOOO PREDICTABLE'
Want to register that domain? We're way ahead of you.
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.