insurancebas.blogg.se - Firefox enable javascript file

Firefox enable javascript file for mac os#
Firefox enable javascript file for android#
Firefox enable javascript file code#
Firefox enable javascript file download#

Firefox enable javascript file download#

If someone can cause a file to be downloaded to your machine (in a cacheįile, or by having the user consent to download it to a known directory), and Even if malicious remote Javascript can't directly access the filesystem, it can affect cache files and cookies. Browsers are careful to make profiles and cache filenames unpredictable, but all it takes is one untrusted file in a known location and it's game over.

Firefox enable javascript file for android#

So the browser does its best to enforce the same-origin policy, but it doesn't always succeed, as demonstrated by the Firefox for Android bug and more generally the existence of XSS vulnerabilities.įurthermore, because of cache files, remote files can possess real file:// URLs. Particularly useful and universal attacks of this type were demonstrated, The disk, and access the data from within cross-domain scripts.

Sensitive files, directories, or applications within containers,Įven if the web page embedding them technically had no way to read back theĭata - a property that a casual user could not verify.Ĭould be used to read back certain constrained formats of local files from Users were uncomfortable with random, untrusted sites opening local, Special privileges on local HTML documents (more), and so this led to As notedĮarlier, many implementations of same-origin policies are eager to bestow To open it by invoking a carefully crafted file:/// URL.

The attacker could first plant a HTMLįile in one these spots during normal browsing activities, and then attempt Many browsers and browser plugins keep their temporary files and cache data The three explanations given for this decision are as In the case of file:, web sites are generally prevented from navigating to The browser security handbook gives a good explanation of the more general rationale: The redirection allows remote pages to exfiltrate files in /sdcard/Download/.

Firefox enable javascript file code#

The JS code above redirects the user to file: URL. Location="intent:file:///(path)#Intent type=text/html end" HTTP or HTTPS URLs to local "file:" URLs, allowing for the reading of localĭata through a violation of same-origin policy. the 2017 exploit in Firefox for Android that allowed a malicious website to read files from /sdcard/Download/ (CVE-2017-7759).Īndroid intent URLs given to Firefox for Android can be used to navigate from These issues are still relevant today with e.g. DoS attacks against the browser or even the OS using file:///con/con or (they let sites steal cookies, passwords, and info on intranet web servers).Ī3. Holes in same-origin policy (cross-domain) becomeīut same-origin holes are already considered serious enough to block releases In a predictable location, any page can link to that file and thus read everyĪ2. These are the holes caused by letting sites link to local files:Ī1.

In Firefox, from the Tools menu, select Add-ons.This is a reasonable question to ask, because it's not immediately apparent why merely opening arbitrary file URLs is bad in the same way that reading arbitrary file URLs is bad.

To enable or disable Java in Firefox 3.6 or later:

Firefox enable javascript file for mac os#

In Firefox for Mac OS X, from the Firefox If the menu bar is hidden, press Alt to make it

In Firefox for Windows, from the Tools menu, select.

To enable or disable JavaScript in Firefox 3.6 or later: Information here may no longer be accurate, and links may no longer be available or reliable. This content has been archived, and is no longer maintained by Indiana University.