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Low Risk Denial of Service in Firefox

Issue A null pointer dereference in the content layout component of Firefox allows an attacker to crash the browser when a user navigates to a malicious page. Impact If a user browses to a malicious page that takes advantage of this vulnerability, the browser will crash.  A feature in Firefox called Session Restore will restore [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

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 [...]

jar: Protocol XSS Security Issues

Issue jar: protocol is not restricted to java archives and will open any zip format file. An attacker can use this to evade filtering on sites that allow users to upload content and use this initiate a cross site scripting attack. Impact Firefox supports the Java Archive URI scheme that allows the addressing of the [...]

Firefox 2.0.0.7 now available

Firefox 2.0.0.7 was released this afternoon to patch the QuickTime issue described here. This will protect Firefox users from the public critical security vulnerability until a patch is available from Apple. I would like to personally thank the individuals at Apple who worked with us and the engineers at Mozilla that work so hard to [...]