Security Vulnerabilities fixed in Firefox for iOS 120 — Mozilla

An attacker could have accessed internal pages or data by ex-filtrating a security key from ReaderMode via the referrerpolicy attribute. An attacker could have performed HTML template injection via Reader Mode and exfiltrated user information...

Security Vulnerabilities fixed in Firefox ESR 102.2 — Mozilla

An attacker could have abused XSLT error handling to associate attacker-controlled content with another origin which was displayed in the address bar. This could have been used to fool the user into submitting data intended for the spoofed origin. A cross-origin iframe referencing an XSLT documen...

Use-after-free in GetStaticInstance in WebRTC — Mozilla

Security researcher Ronald Crane reported a race condition in GetStaticInstance in WebRTC which results in a use-after-free. This could result in a potentially exploitable crash. This issue was found through code inspection and does not have clear mechanism to be exploited through web content but...

Underflow through code inspection — Mozilla

Security researcher Ronald Crane reported an underflow found through code inspection. This does not all have a clear mechanism to be exploited through web content but could be vulnerable if a means can be found to trigger it...

Use-after-free while manipulating HTML media content — Mozilla

An anonymous researcher reported, via HP's Zero Day Initiative, a use-after-free vulnerability with HTML media elements on a page during script manipulation of the URI table of these elements. This results in a potentially exploitable crash...

Referrer policy ignored when links opened by middle-click and context menu — Mozilla

Security researcher Alex Verstak reported that is ignored when a link is opened through the context menu or a middle-click by mouse. This means that, in some situations, the referrer policy is ignored when opening links in new tabs and may cause some pages to open without an HTTP Referer header...

Use-after-free in Event Listener Manager — Mozilla

Security researchers Tyson Smith and Jesse Schwartzentruber of the BlackBerry Security Automated Analysis Team used the Address Sanitizer tool while fuzzing to discover a use-after-free in the event listener manager. This can be triggered by web content and leads to a potentially exploitable cras...

crypto.generateCRMFRequest does not validate type of key — Mozilla

Mozilla developer David Keeler reported that the crypto.generateCRFMRequest method did not correctly validate the key type of the KeyParams argument when generating ec-dual-use requests. This could lead to a crash and a denial of service DOS attack...

Buffer underflow when generating CRMF requests — Mozilla

Security researcher Nils used the Address Sanitizer to discover a use-after-free problem when generating a Certificate Request Message Format CRMF request with certain parameters. This causes a potentially exploitable crash...

Uninitialized functions in DOMSVGZoomEvent — Mozilla

Mozilla community member Ms2ger discovered that some DOMSVGZoomEvent functions are used without being properly initialized, causing uninitialized memory to be used when they are called by web content. This could lead to a information leakage to sites depending on the contents of this uninitialize...

Crash when combining SVG text on path with CSS — Mozilla

Security researcher Jonathan Stephens discovered that combining SVG text on a path with the setting of CSS properties could lead to a potentially exploitable crash...

Escalation of privilege through about:newtab — Mozilla

Security researcher Mariusz Mlynski reported that when a page opens a new tab, a subsequent window can then be opened that can be navigated to about:newtab, a chrome privileged page. Once about:newtab is loaded, the special context can potentially be used to escalate privilege, allowing for...

Firefox Recovery Key.html is saved with unsafe permission — Mozilla

magicant starmen reported that if a user chooses to export their Firefox Sync key the "Firefox Recovery Key.html" file is saved with incorrect permissions, making the file contents potentially readable by other users on Linux and OS X systems...

Code execution via NoWaiverWrapper — Mozilla

Mozilla security researcher mozbugra4 reported that an internal privilege check failed to respect the NoWaiverWrappers introduced with Firefox 4. This could result in elevated privilege being granted to web content...

Cross-origin image theft on Mac with integrated Intel GPU — Mozilla

Claus Wahlers reported that random images from GPU memory were showing up in WebGL textures. Once incorporated into the WebGL graphics it is possible for a site to programmatically read the image data and potentially gain sensitive data from other things that had been displayed earlier. This...

XSS encoding hazard with inline SVG — Mozilla

Security researcher Mario Heiderich reported that HTML-encoded entities were being improperly decoded when displayed inside SVG elements. This could lead to XSS attacks on sites relying on HTML encoding of user-supplied content...

Integer overflow vulnerability in NewIdArray — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that JavaScript arrays were vulnerable to an integer overflow vulnerability. The report demonstrated that an array could be constructed containing a very large number of items such that when memory was allocated to sto...

Dangling pointer vulnerability using DOM plugin array — Mozilla

Security researcher Sergey Glazunov reported a dangling pointer vulnerability in the implementation of navigator.plugins in which the navigator object could retain a pointer to the plugins array even after it had been destroyed. An attacker could potentially use this issue to crash the browser an...

Dangling pointer vulnerability in nsPluginArray — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an error in the implementation of the window.navigator.plugins object. When a page reloads, the plugins array would reallocate all of its members without checking for existing references to each member. This could resu...

XSS hazard using SVG document and binary Content-Type — Mozilla

Mozilla security researcher Georgi Guninski reported that when a SVG document which is served with Content-Type: application/octet-stream is embedded into another document via an tag with type="image/svg+xml", the Content-Type is ignored and the SVG document is processed normally. A website which...

Web Worker Array Handling Heap Corruption Vulnerability — Mozilla

Security researcher Orlando Barrera II of SecTheory reported, via TippingPoint's Zero Day Initiative, that Mozilla's implementation of Web Workers contained an error in its handling of array data types when processing posted messages. This error could be used by an attacker to corrupt heap memory...

TreeColumns dangling pointer vulnerability — Mozilla

An anonymous security researcher, via TippingPoint's Zero Day Initiative, reported that the columns of a XUL tree element could be manipulated in a particular way which would leave a pointer owned by the column pointing to freed memory. An attacker could potentially use this vulnerability to cras...

Crash and remote code execution via __proto__ tampering — Mozilla

Mozilla developer Jesse Ruderman demonstrated that by tampering with the window.proto.proto object, one can cause the browser to place a lock on a non-native object, leading to a crash. Although we have not demonstrated such control, a determined attacker might be able to exploit this crash to ru...

nsXMLDocument::OnChannelRedirect() same-origin violation — Mozilla

Mozilla security researcher mozbugra4 reported that the same-origin check in nsXMLDocument::OnChannelRedirect could be bypassed. This vulnerability could be used to execute JavaScript in the context of a different website...

Improvements to help protect against Cross-Site Scripting attacks — Mozilla

Firefox 2.0.0.2 and 1.5.0.10 contain several small changes that will make it easier for sites to protect their visitors against Cross-Site Scripting XSS attacks. Invalid trailing characters in HTML tag attributes The Mozilla parser formerly ignored invalid trailing characters in HTML tag attribut...

JavaScript garbage-collection hazard audit — Mozilla

Igor Bukanov has audited the JavaScript engine for routines that use temporary variables not protected against garbage-collection. If malicious content could cause garbage-collection to run during the lifetime of these temporaries then the original routine would end up operating on freed memory...

Privilege escalation via XBL.method.eval — Mozilla

Using the eval associated with methods of an XBL binding it was possible to create JavaScript functions that would get compiled with the wrong privileges, allowing the attacker to run code of their choice with the full permission of the user running the browser. This could be used to install...

Security Vulnerabilities fixed in Focus for iOS 126 — Mozilla

The file scheme of URLs would be hidden, resulting in potential spoofing of a website's address in the location bar...

Security Vulnerabilities fixed in Firefox ESR 115.6 — Mozilla

The WebGL DrawElementsInstanced method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. EncryptingOutputStream was susceptible to exposing uninitialized data. This issue...

Security Vulnerabilities fixed in Firefox ESR 102.1 — Mozilla

When combining CSS properties for overflow and transform, the mouse cursor could interact with different coordinates than displayed. When visiting directory listings for chrome:// URLs as source text, some parameters were reflected. When opening a Windows shortcut from the local filesystem, an...

Security Vulnerabilities fixed in Thunderbird 91.1 — Mozilla

When delegating navigations to the operating system, Thunderbird would accept the mk scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. This bug only affects Thunderbird for Windows. Other operating systems are unaffected. Mozilla...

Security vulnerabilities fixed in Firefox ESR 45.6 — Mozilla

Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. Event handlers on marquee elements were executed despite a strict Content Security Policy CSP that disallowed inline JavaScript. Memory corruption resulting in a potentially...

Form input type change from password to text can store plain text password in session restore file — Mozilla

Mozilla employee Mike Kaply reported that the Firefox session restore data can contain passwords in plain text if a password input field on a page has its type changed from "password" to "text" during a session. This can occur if the password input field has a scripted mechanism to display the...

Lockscreen passcode bypass due to race condition — Mozilla

Shally Li was first to report a race condition in the lockscreen of Firefox OS that can be used to bypass the passcode lock of a Firefox OS device. Under certain circumstances on a locked device, the user will be dropped directly to the homescreen instead of being presented with the passcode inpu...

Scripted proxies can access inner window — Mozilla

Security researcher André Bargull reported that when a web page creates a scripted proxy for the window with a handler defined a certain way, a reference to the inner window will be passed, rather than that of the outer window in violation of the specification...

Out of bounds read in QCMS library with ICC V4 profile attributes — Mozilla

Security researcher Felix Gröbert of Google discovered an out of bounds read in the QCMS color management library while manipulating an image with specific attributes in its ICC V4 profile. This causes a crash and could lead to information disclosure...

Use-after-free in XMLHttpRequest with shared workers — Mozilla

Security researcher Looben Yang discovered a use-after-free vulnerability when recursively calling .open on an XMLHttpRequest in a SharedWorker...

Invoking Mozilla updater will load locally stored DLL files — Mozilla

Security researcher Holger Fuhrmannek reported that when the Mozilla updater is run directly, the updater will load binary DLL format files from the local working directory or from the Windows temporary directories. This occurs when it is run without the Mozilla Maintenance Service on Windows...

Gecko Media Plugin sandbox escape — Mozilla

Security researcher Nils discovered a mechanism to break out of the Gecko Media Plugin GMP sandbox on Windows systems. The GMP sandbox is currently only used to host h.264 video playback using the OpenH264 plugin but is being developed to host other other media plugins. This bug would allow an...

Use-after-free with select element — Mozilla

Security researcher Scott Bell used the Address Sanitizer tool to discover a use-after-free when using a element in a form after it has been destroyed. This could lead to a potentially exploitable crash...

Same-origin bypass through symbolic links — Mozilla

Security researcher Takeshi Terada reported a mechanism to violate same-origin policy for local files using file:// through the use of symbolic links. This problem only affects web pages loaded from the local filesystem. This could allow for cross-site scripting XSS and access to locally stored...

Wrong principal used for validating URI for some Javascript components — Mozilla

Security researcher Cody Crews reported that some Javascript components will perform checks against the wrong uniform resource identifier URI before performing security sensitive actions. This will return an incorrect location for the originator of the call. This could be used to bypass same-orig...

Use-after-free in ListenerManager — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free within the ListenerManager when garbage collection is forced after data in listener objects have been allocated in some circumstances. This results in a use-after-free which can lead to arbitrary cod...

Crash with malformed embedded XSLT stylesheets — Mozilla

Security researchers Nicolas Grégoire and Aki Helin independently reported that when processing a malformed embedded XSLT stylesheet, Firefox can crash due to a memory corruption. While there is no evidence that this is directly exploitable, there is a possibility of remote code execution...

Multiple WebGL crashes — Mozilla

Mozilla security researcher Christoph Diehl reported two crashes in WebGL code. One crash was the result of an out-of-bounds read and could be used to read data from other processes who had stored data in the GPU. The severity of this issue was determined to be high. The second crash was the resu...

Heap buffer overflow mixing document.write and DOM insertion — Mozilla

Morten Kråkvik of Telenor SOC reported an exploit targeting particular versions of Firefox 3.6 on Windows XP that Telenor found while investigating an intrusion attempt on a customer network. The underlying vulnerability, however, was present on both the Firefox 3.5 and Firefox 3.6 development...

Unsafe library loading vulnerabilities — Mozilla

Mozilla developer Ehsan Akhgari reported that a function used to load external libraries on Windows platforms was using a relative path to a DLL-loading application and was thus vulnerable to binary planting if an attacker was able to place an executable of the same name in the current working...

Dangling pointer vulnerability in nsTreeContentView — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that the implementation of XUL 's content view contains a dangling pointer vulnerability. One of the content view's methods for accessing the internal structure of the tree could be manipulated into removing a node pri...

Cross-origin data leakage from script filename in error messages — Mozilla

Security researcher Soroush Dalili reported that potentially sensitive URL parameters could be leaked across domains upon script errors when the script filename and line number is included in the error message...

Dangling pointer vulnerability in nsTreeContentView — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an error in the way elements are inserted into a XUL tree . In certain cases, the number of references to an element is under-counted so that when the element is deleted, a live pointer to its old location is kept arou...