Feeds

Firefox exploit targets zero day vulns

Warning as malicious script goes feral

  • alert
  • submit to reddit

Top 5 reasons to deploy VMware with Tegile

Security researchers have discovered two unpatched vulnerabilities in Firefox, the popular alternative web browser. The security bugs affect even the latest version of Firefox (version 1.0.3) and create a means for attackers to seize control of vulnerable systems using cross-site scripting attacks.

One vulnerability enables arbitrary JavaScript code with escalated privileges to be executed via a specially crafted JavaScript URL. Successful exploitation requires that a site is allowed to install software (default sites are "update.mozilla.org" and "addons.mozilla.org"). This would normally drastically reduce the scope for mischief - but for a second security bug, involving "IFRAME" JavaScript URLs, which creates a means to execute arbitrary HTML and script code in the context of an arbitrary site.

A combination of the two vulnerabilities can be exploited to execute arbitrary code on vulnerable systems, according to Danish security firm Secunia. Exploit code is publicly available greatly increasing the chance of attack, it warns. The vulnerabilities - described by Secunia as "extremely critical" - have been confirmed in version 1.0.3 of Firefox. Other versions may also be affected.

Users are advised to disable JavaScript and the software installation option within Firefox pending a more comprehensive fix from the Mozilla Foundation. ®

Related stories

Unholy trio menace Firefox
Browser bugs sprout eternal
Drive-by Trojans exploit browser flaws
The unsavoury world of PC licences and Firefox exploits
Firefox dusted down with security upgrade
Firefox doubles market share as IE slips

Security for virtualized datacentres

More from The Register

next story
'Kim Kardashian snaps naked selfies with a BLACKBERRY'. *Twitterati gasps*
More alleged private, nude celeb pics appear online
Home Depot ignored staff warnings of security fail laundry list
'Just use cash', former security staffer warns friends
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
UK.gov lobs another fistful of change at SME infosec nightmares
Senior Lib Dem in 'trying to be relevant' shocker. It's only taxpayers' money, after all
Who.is does the Harlem Shake
Blame it on LOLing XSS terroristas
Snowden, Dotcom, throw bombs into NZ election campaign
Claim of tapped undersea cable refuted by Kiwi PM as Kim claims extradition plot
Freenode IRC users told to change passwords after securo-breach
Miscreants probably got in, you guys know the drill by now
THREE QUARTERS of Android mobes open to web page spy bug
Metasploit module gobbles KitKat SOP slop
BitTorrent's peer-to-peer chat app Bleep goes live as public alpha
A good day for privacy as invisble.im also reveals its approach to untraceable chats
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
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.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
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.