Security Vulnerabilities fixed in Firefox for iOS 25 — Mozilla

For native-to-JS bridging, the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token was being used for JS-to-native also, but it isn't needed in this case, and its usage was also leaking this token...

XSS attack through intents on Firefox for Android — Mozilla

Security researcher Muneaki Nishimura reported that on Firefox for Android that it is possible to create a cross-site script XSS attack through the use of Android intents and fallback navigation. This issue is caused by improper sterilization of opened addresses sent to Firefox through intents...

OS X crash reports may contain entered key press information — Mozilla

Mozilla developer David Parks discovered while reviewing Firefox crash reports that personal data can sometimes be contained in reports from OS X systems. This is because these OS X crash reports will contain the native key that triggered the crash and this can sometimes contain key press...

Bypass of XrayWrappers using XBL Scopes — Mozilla

Mozilla Developer Bobby Holley and Mozilla security researcher mozbugra4 discovered a mechanism where XBL scopes can be be used to circumvent XrayWrappers from within the Chrome on unprivileged objects. This allows web content to potentially confuse privileged code and weaken invariants and can...

Use-after-free in Vibrate — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free using the domDoc pointer within Vibrate library. This can lead to arbitrary code execution when exploited...

Insecure Diffie-Hellman key exchange — Mozilla

Mozilla cryptographer Nelson Bolyard reported that the SSL implementation was permitting servers to use Diffie-Hellman Ephemeral mode DHE with too short of a minimum key length. DHE keys of such lengths are trivially breakable on modern hardware so SSL servers operating in this mode were providin...

XSS using SJOW scripted function — Mozilla

Mozilla security researcher mozbugra4 reported that the wrapper class XPCSafeJSObjectWrapper SJOW on the Mozilla 1.9.1 development branch has a logical error in its scripted function implementation that allows the caller to run the function within the context of another site. This is a violation ...

Characters mapped to U+FFFD in 8 bit encodings cause subsequent character to vanish — Mozilla

Security researcher O. Andersen reported that undefined positions within various 8 bit character encodings are mapped to the sequence U+FFFD which when displayed causes the immediately following character to disappear from the text run. This could potentially contribute to XSS problems on sites...

XSS via plugins and unprotected Location object — Mozilla

Mozilla developer Blake Kaplan reported that the window.location object was made a normal overridable JavaScript object in the Firefox 3.6 browser engine Gecko 1.9.2 because new mechanisms were developed to enforce the same-origin policy between windows and frames. This object is unfortunately al...

Race condition while accessing the private data of a NPObject JS wrapper class object — Mozilla

Jakob Balle and Carsten Eiram of Secunia Research reported a race condition in NPObjWrapperNewResolve when accessing the properties of a NPObject, a wrapped JSObject. Balle and Eiram demonstrated that this condition could be reached by navigating away from a web page during the loading of a Java...

Cross-domain data theft via script redirect error message — Mozilla

Google security researcher Chris Evans reported that a website could access a limited amount of data from a different domain by loading a same-domain JavaScript URL which redirects to an off-domain target resource containing data which is not parsable as JavaScript. Upon attempting to load the da...

Crash and remote code execution in nsFrameManager — Mozilla

ling and wushi of team509, via TippingPoint's Zero Day Initiative program, reported a flaw in part of Mozilla's DOM constructing code. This vulnerability can be exploited by modifying certain properties of a file input element before it has finished initializing. When the blur method of the...

Chrome script loading from fastload file — Mozilla

Mozilla security researcher mozbugra4 reported that when non-privileged XUL documents include scripts from chrome: URIs used in the browser it was possible to take advantage of the privilege level stored in the pre-compiled "fastload" file. This could allow an attacker to run arbitrary JavaScript...

Web forgery overwrite with div overlay — Mozilla

Security researchers Emil Ljungdahl and Lars-Olof Moilanen demonstrated that, in cases where the entire contents of a page are enclosed in a with absolute positioning, a web forgery warning dialog won't be displayed unless the user switches tabs away-from then back-to the forgery page...

XPCNativeWraper pollution using Script object — Mozilla

Mozilla security researcher mozbugra4 reported that it was possible to use the Script object to modify XPCNativeWrappers in such a way that subsequent access by the browser chrome--such as by right-clicking to open a context menu--can cause attacker-supplied javascript to run with the same...

XSS using addEventListener and setTimeout — Mozilla

Mozilla contributor mozbugra4 demonstrated that the methods addEventListener and setTimeout could be used to inject script into another site in violation of the browser's same-origin policy. This could be used to access or modify private or valuable information from that other site...

Persistent Autocomplete Denial of Service — Mozilla

Marcel reported that a malicious web page could perform a denial of service attack against the form autocomplete feature that would persist from session to session until the malicious form data was deleted. Filling a text field with millions of characters and submitting the form will cause the...

RSS Feed-preview referrer leak — Mozilla

Jared Breland reported on LEGROOM.net that when the new "Feed Preview" feature in Firefox 2.0 retrieves the icons of the installed web-based feed viewers it is potentially informing those services of your feed-browsing habits by sending the URL of the feed in a referrer header with each icon...

Popup-blocker cross-site scripting (XSS) — Mozilla

shutdown demonstrated that blocked popups opened from the status bar "blocked popups" icon were always opened in the context of the site listed in the Location address bar, even if the blocked popup were originally opened by a subframe loaded from another site. This allows the popup to perform a...

Heap buffer overwrite on malformed VCard — Mozilla

A VCard attachment with a malformed base64 field such as a photo can trigger a heap buffer overwrite. These have proven exploitable in the past, though in this case the overwrite is accompanied by an integer underflow that would attempt to copy more data than the typical machine has, leading to a...

Native DOM methods can be hijacked across domains — Mozilla

A malicious page can hijack native DOM methods on a document object in another domain, which will run the attacker's script when called by the victim page. This could be used to steal login cookies, password, or other sensitive data on the target page, or to perform actions on behalf of a logged-...

XSS viewing javascript: frames or images from context menu — Mozilla

Paul Nickerson demonstrated that if an attacker could convince a user to right-click on a broken image and choose "View Image" from the context menu then he could get javascript to run on a site of the attacker's choosing by making the image src attribute a javascript: URL and loading the target...

Fixes for crashes with potential memory corruption (rv:1.8.0.4) — Mozilla

Mozilla team members discovered several crashes during testing of the browser engine showing evidence of memory corruption that we presume is exploitable...

Security check of js_ValueToFunctionObject() can be circumvented — Mozilla

The security check in jsValueToFunctionObject can be bypassed by clever use of setTimeout and the new Firefox 1.5 array method ForEach. shutdown demonstrated how to leverage this into a privilege escalation vulnerability that would allow the installation of malware...

Arbitrary code execution from Firefox sidebar panel — Mozilla

If a user bookmarked a malicious page as a Firefox sidebar panel that page could execute arbitrary programs by opening a privileged page and injecting javascript into it...

Plugins can be used to load privileged content — Mozilla

Plugins such as flash can be used to load privileged content into a frame. Once loaded various spoofs can be applied to get the user to interact with the privileged content. Michael Krax's "Fireflashing" example demonstrates that an attacker can open about:config in a frame, hide it with an opaci...

Window Injection Spoofing — Mozilla

A website can inject content into a popup opened by another site if the target name of the popup window is known. An attacker who knows you are going to visit that other site could spoof the contents of the popup...

Security Vulnerabilities fixed in Firefox 135 — Mozilla

An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. The fullscreen notification is prematurely hidden when...

Security Vulnerabilities fixed in Firefox ESR 115.16 — Mozilla

A compromised content process could have allowed for the arbitrary loading of cross-origin pages. An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the resource://pdf.js origin. This could allow them to access cross-origin PDF content. This access i...

Security Vulnerabilities fixed in Firefox ESR 115.13 — Mozilla

An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. Due to large allocation checks in Angle for GLSL shaders being too lenient an out-of-bounds access could occur when...

Security Vulnerabilities fixed in Firefox ESR 115.5.0 — Mozilla

On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to ...

Security Vulnerabilities fixed in Firefox for iOS 28 — Mozilla

A rogue webpage could override the injected WKUserScript used by the download feature, this exploit could result in the user downloading an unintended file. A rogue webpage could override the injected WKUserScript used by the logins autofill, this exploit could result in leaking a password for th...

Partial same-origin-policy through setting location.host through data URI — Mozilla

Security researcher Armin Ebert reported that the location.host property can be set to an arbitrary string after creating an invalid data: URI. This allows for a bypass of some same-origin policy protections. This issue is mitigated by the data: URI in use and any same-origin checks for http: or...

Application Reputation service disabled in Firefox 43 — Mozilla

Mozilla developer François Marier reported that the Firefox was unable to reach the Application Reputation service due to a bug introduced in Firefox 43, disabling the ability to warn against potentially malicious downloads. Other parts of the Safe Browsing feature, for example the warnings about...

JavaScript garbage collection crash with Java applet — Mozilla

Mozilla community member Vytautas Staraitis reported an issue with the interaction of Java applets and JavaScript. The Java plugin can deallocate a JavaScript wrapper when it is still in use, which leads to a JavaScript garbage collection crash. This crash is potentially exploitable...

Android intents can be used on Firefox for Android to open privileged files — Mozilla

Security researcher Muneaki Nishimura reported that on Firefox for Android, a search engine can be registered and used to launch Firefox through an Android intent. When Firefox for Android is launched, the URL can executed with Firefox's system privileges if the crash reporter is used. This allow...

Out-of-bounds read during 2D canvas display on Linux 16-bit color depth systems — Mozilla

Security researcher Francisco Alonso of the NowSecure Research Team used the Address Sanitizer tool to discover an out-of-bounds read issue during 2D canvas rendering. This was due to an issue in the cairo graphics library when surfaces are created with 32-bit color depth but displayed on a 16-bi...

Crash when using shared memory in JavaScript — Mozilla

Security researcher Jukka Jylänki reported a crash that occurs because JavaScript, when using shared memory, does not properly gate access to Atomics or SharedArrayBuffer views in some contexts. This leads to a non-exploitable crash...

Use-after-free in MediaStream playback — Mozilla

Security researcher SkyLined reported a use-after-free issue in how audio is handled through the Web Audio API during MediaStream playback through interactions with the Web Audio API. This results in a potentially exploitable crash...

Sensitive URL encoded information written to Android logcat — Mozilla

Security researcher Muneaki Nishimura reported that Firefox for Android would write potentially sensitive data to the Android logcat that was encoded as part of logged URL strings. On Android 4.0 or earlier systems, logcat data is available to any application having READLOGS permission, leading t...

Buffer overflow while parsing media content — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover a buffer overflow during the parsing of media content. This leads to a potentially exploitable crash...

XrayWrappers exposes chrome-only properties when not in chrome compartment — Mozilla

Mozilla developer Peter Van der Beken discovered that same-origin XrayWrappers expose chrome-only properties even when not in a chrome compartment. This can allow web content to get properties of DOM objects that are intended to be chrome-only...

Miscellaneous memory safety hazards (rv:1.9.2.13/ 1.9.1.16) — Mozilla

Mozilla developers identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be...

Chrome privilege escalation with window.open and <isindex> element — Mozilla

Security researcher echo reported that a web page could open a window with an about:blank location and then inject an element into that page which upon submission would redirect to a chrome: document. The effect of this defect was that the original page would wind up with a reference to a...

SSL wildcard certificate matching IP addresses — Mozilla

Security researcher Richard Moore reported that when an SSL certificate was created with a common name containing a wildcard followed by a partial IP address a valid SSL connection could be established with a server whose IP address matched the wildcard range by browsing directly to the IP addres...

Chrome privilege escalation via forced URL drag and drop — Mozilla

Security researcher Paul Stone reported that a browser applet could be used to turn a simple mouse click into a drag-and-drop action, potentially resulting in the unintended loading of resources in a user's browser. This behavior could be used twice in succession to first load a privileged chrome...

Content policy bypass with image preloading — Mozilla

Mozilla developer Josh Soref of Nokia reported that documents failed to call certain security checks when attempting to preload images. Although the image content is not available to the page, it is possible to specify protocols that are normally not allowed in a web page such as file:. This...

Asynchronous Auth Prompt attaches to wrong window — Mozilla

Mozilla developer Justin Dolske reported that the new asynchronous Authorization Prompt HTTP username and password was not always attached to the correct window. Although we have not demonstrated this, it may be possible for a malicious page to convince a user to open a new tab or popup to a...

Crash and remote code execution using watch and __defineSetter__ on SVG element — Mozilla

Security researcher PenPal reported a crash involving a SVG element on which a watch function and defineSetter function have been set for a particular property. The crash showed evidence of memory corruption and could potentially be used by an attacker to run arbitrary code on a victim's computer...

Corrupt JIT state after deep return from native function — Mozilla

Firefox user zbyte reported a crash that we determined could result in an exploitable memory corruption problem. In certain cases after a return from a native function, such as escape, the Just-in-Time JIT compiler could get into a corrupt state. This could be exploited by an attacker to run...