Security Corner

Mar 6 2009   1:35AM GMT

Firefox 3.0.7 Released, Addresses Multiple Vulnerabilities

Ken Harthun Ken Harthun Profile: Ken Harthun

Mozilla Foundation released Firefox 3.0.7 today to address multiple vulnerabilities. According to the Security Advisories, the vulnerabilities may allow an attacker to execute arbitrary code, cause a denial-of-service condition, obtain sensitive information, or spoof the location bar. Mozilla says that the vulnerabilities also affect Thunderbird and SeaMonkey. No updates have been released for these applications at this time.

The following Security Advisories are addressed in Firefox 3.0.7:

  • Mozilla Foundation Security Advisory 2009-07: “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.”
  • Mozilla Foundation Security Advisory 2009-08: “An anonymous researcher, via TippingPoint’s Zero Day Initiative program, reported a vulnerability in Mozilla’s garbage collection process. The vulnerability was caused by improper memory management of a set of cloned XUL DOM elements which were linked as a parent and child. After reloading the browser on a page with such linked elements, the browser would crash when attempting to access an object which was already destroyed. An attacker could use this crash to run arbitrary code on the victim’s computer.”
  • Mozilla Foundation Security Advisory 2009-09: “Mozilla security researcher Georgi Guninski reported that a website could use nsIRDFService and a cross-domain redirect to steal arbitrary XML data from another domain, a violation of the same-origin policy. This vulnerability could be used by a malicious website to steal private data from users authenticated to the redirected website.”
  • Mozilla Foundation Security Advisory 2009-10: “libpng maintainer Glenn Randers-Pehrson reported several memory safety hazards in PNG libraries used by Mozilla. These vulnerabilities could be used by a malicious website to crash a victim’s browser and potentially execute arbitrary code on their computer. libpng was upgraded to a version which contained fixes for these flaws.”
  • Mozilla Foundation Security Advisory 2009-11: “Mozilla contributor Masahiro Yamada reported that certain invisible control characters were being decoded when displayed in the location bar, resulting in fewer visible characters than were present in the actual location. An attacker could use this vulnerability to spoof the location bar and display a misleading URL for their malicious web page.”

Everyone should immediately upgrade to Firefox 3.0.7 to mitigate these issues.

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