Monthly Archive: February 2021

When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox...

One phishing tactic on the web is to provide a link with HTTP Auth. For example ‘https://www.phishingtarget.com@evil.com’. To mitigate this type of attack, Firefox will display a warning dialog; however, this warning dialog would...

When processing a redirect with a conflicting Referrer-Policy, Firefox would have adopted the redirect’s Referrer-Policy. This would have potentially resulted in more information than intended by the original origin being provided to the destination...

Context-specific code was included in a shared jump table; resulting in assertions being triggered in multithreaded wasm code. This vulnerability affects Firefox < 86. Date published : 2021-02-25 https://security.gentoo.org/glsa/202104-10 https://bugzilla.mozilla.org/show_bug.cgi?id=1681724

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not...

If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used...

When sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This vulnerability affects Firefox...

Incorrect use of the ‘‘ method could have led to a user-after-poison and a potentially exploitable crash. This vulnerability affects Firefox < 85. Date published : 2021-02-25 https://bugzilla.mozilla.org/show_bug.cgi?id=1677194 https://www.mozilla.org/security/advisories/mfsa2021-03/

Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network’s hosts as well as services running on the user’s local machine. This vulnerability affects...

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7. Date published : 2021-02-25...

An XSS bug in internal error pages could have led to various spoofing attacks, including other error pages and the address bar. Note: This issue only affected Firefox for Android. Other operating systems are...

The browser could have been confused into transferring a screen sharing state into another tab, which would leak unintended information. This vulnerability affects Firefox < 85. Date published : 2021-02-25 https://bugzilla.mozilla.org/show_bug.cgi?id=1642747 https://www.mozilla.org/security/advisories/mfsa2021-03/

Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85....

An ambiguous file picker design could have confused users who intended to select and upload a single file into uploading a whole directory. This was addressed by adding a new prompt. This vulnerability affects...