New Firefox 3.0.2 fixes five security issues

Mozilla Corporation released a new version of their popular Firefox web browser. The new release fixes five security vulnerabilities.

MFSA 2008-44 resource: traversal vulnerabilities

Mozilla developer Boris Zbarsky reported that the resource: protocol allowed directory traversal on Linux when using URL-encoded slashes. Mozilla developer Georgi Guninski reported that the restrictions imposed on local HTML files could be bypassed using the resource: protocol. The vulnerability allowed an attacker to read information about the system and prompt the victim to save the information in a file.

MFSA 2008-43 BOM characters stripped from JavaScript before execution

Microsoft developer Dave Reed reported that certain BOM characters are stripped from JavaScript code before it is executed. This can lead to code, which would otherwise be treated as part of a quoted string, to be executed. The issue could potentially be used by an attacker to bypass or evade script filters and perform an XSS attack.

MFSA 2008-42 Crashes with evidence of memory corruption (rv:

Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code.

MFSA 2008-41 Privilege escalation via XPCnativeWrapper pollution

Mozilla developer Olli Pettay reported that XSLT can create documents which do not have script handling objects. moz_bug_r_a4 also reported that document.loadBindingDocument() returns a document that does not have a script handling object. These issues could also be used by an attacker to run arbitrary script with chrome privileges.

MFSA 2008-40 Forced mouse drag

Mozilla developer Paul Nickerson reported a variant of a click-hijacking vulnerability discovered in Internet Explorer by Liu Die Yu. The vulnerability allowed an attacker to move the content window while the mouse was being clicked, causing an item to be dragged rather than clicked-on. This issue could potentially be used to force a user to download a file or perform other drag-and-drop actions.

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