Feeds

Firefox broken Jar vuln. menaces Gmail

Jar Jar links peril

Intelligent flash storage arrays

Security watchers are concerned that a protocol handling flaw in Firefox could have implications for the security of data held within Google and, possibly, other web applications.

The flaw, involving the handling of the "jar:" protocol by Firefox, gives rise to cross-site scripting attacks. No patch is available through there are a number of workarounds (such as blocking URIs that contain "jar:" using a reverse proxy or application firewall). For home users, Secunia advises users to avoid following untrusted "jar:" links or visiting untrusted websites.

The jar: protocol is used to extract and render content from ZIP compressed files. Unfortunately the "jar:" protocol handler in Firefox does not validate the MIME type of the contents of an archive, which are then executed in the context of the site hosting the archive.

The trick might be used to conduct cross-site scripting attacks on sites that allow a user to upload certain files, such as .zip or .png.

As the GNUCitizen blog notes application which allow the upload of JAR/ZIP files are potentially vulnerable to a persistent Cross-site Scripting as a result of the bug. Web mail clients, collaboration systems, document sharing systems are all potential targets on attack.

The attack could be used to steal cookie-based authentication credentials, for example. GNUCitizen has published a proof of concept demo that illustrates how a user's contact book in Gmail might be accessed using the approach.

Suitably the results page of the demo is illustrated with a picture of insufferably annoying (and arguably racist) Star Wars character Jar Jar Binks. ®

Top 5 reasons to deploy VMware with Tegile

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
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.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.