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TippingPoint vulnerability patched in Firefox 3.0.1 and 2.0.0.16

Issue
A vulnerability in the way Firefox handles CSS allows an attacker to take advantage of an integer overflow and execute arbitrary code.  In order for the attack to be successful a user must browse to a malicious site.  The advisory is available here.
Impact
This critical vulnerability was reported to Mozilla before details were available publicly.  By [...]

Mozilla Security Metrics Project

Mozilla has been working with security researcher and analyst Rich Mogull for a few months now on a project to develop a metrics model to measure the relative security of Firefox over time. We are trying to develop a model that goes beyond simple bug counts and more accurately reflects both the effectiveness of secure [...]

Firefox users most likely to run latest version of the browser

A recent report identified Firefox users as most likely to be running the latest version of the browser at any point in time.  Brian Krebs at the Washington Post comments on it here: Forty Percent of Web Users Surf With Unsafe Browsers
This is great news for Mozilla, since it demonstrates that the work that [...]

New Security Issue Under Investigation

TippingPoint ZDI notified Mozilla of a vulnerability in Firefox that impacts versions 2.x and 3.0.  This issue is currently under investigation.  To protect our users, the details of the issue will remain closed until a patch is made available.  There is no public exploit, the details are private, and so the current risk to users [...]

Clarification on Vietnamese Language Pack Compromise

As today’s headlines confirm, there is still a lot of confusion about what happened to the Vietnamese language pack, who is impacted, and what that impact really is.
First of all, there is no virus in the Vietnamese language pack. Vietnamese language pack for Firefox users have not been infected with a virus.  The remnant we [...]

Compromised file in Vietnamese Language Pack for Firefox 2

The Vietnamese language pack for Firefox 2 contains inserted code to load remote content.  This code is the result of a virus infection, but does not contain the virus itself.  This usually results in the user seeing unwanted ads, but may be used for more malicious actions.
Everyone who downloaded the most recent Vietnamese language pack [...]

Status update for Chrome Protocol Directory Traversal issue

Background on this issue is available here.
Impact
An attacker can use this vulnerability to collect session information, including session cookies and session history.  Firefox is not vulnerable by default.  Only users that have installed “flat” packed add-ons are at risk.  Discussion about “flat” packaged add-ons is here.  A partial list of “flat” packed add-ons is available [...]

chrome protocol directory traversal

Issue
A vulnerability in the chrome protocol scheme allows directory traversal when a “flat” add-on is present resulting in potential information disclosure.
Impact
When a chrome package is “flat” rather than contained in a .jar the directory traversal allows escaping the extensions directory and reading files in a predictable location on the disk.  Many add-ons are packaged in [...]

Read past the headlines – Firefox is fixed faster

Secunia released a report this week that discusses a few aspects of the security landscape for 2007.  Techworld ran a story based on this report with this headline: “Red Hat and Firefox more buggy than Microsoft.”  While the headline is misleading, the Techworld article actually tells an interesting story.
Counting security vulnerabilities to compare the security [...]

BasicAuth dialog realm value spoofing

Issue
The realm value in a basic authentication dialog may be spoofed by a attacker to trick users into thinking the authentication request is coming from a different, trusted site.
Impact
When displaying the basic authentication dialog, Firefox displays the actual source of the request at the end of the dialog text.  Some other browsers display the request [...]