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...

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...

WOFF heap corruption due to integer overflow — Mozilla

Security researcher Evgeny Legerov of Intevydis reported that the WOFF decoder contains an integer overflow in a font decompression routine. This flaw could result in too small a memory buffer being allocated to store a downloadable font. An attacker could use this vulnerability to crash a victim...

Heap buffer overflow in string to number conversion — Mozilla

Security researcher Alin Rad Pop of Secunia Research reported a heap-based buffer overflow in Mozilla's string to floating point number conversion routines. Using this vulnerability an attacker could craft some malicious JavaScript code containing a very long string to be converted to a floating...

Multiple cross origin wrapper bypasses — Mozilla

Mozilla security researcher mozbugra4 reported a series of vulnerabilities in which objects that normally receive a XPCCrossOriginWrapper are constructed without the wrapper. This can lead to cases where JavaScript from one website may unsafely access properties of such an object which had been s...

XSS hazard using third-party stylesheets and XBL bindings — Mozilla

Web developer Cefn Hoile reported that sites which allow users to embed third-party stylesheets are vulnerable to script injection attacks using XBL bindings. While this behavior was documented previously, it was determined that this particular risk was not well-understood by some websites. To...

Directives to not cache pages ignored — Mozilla

Paul Nel reported that certain HTTP directives to not cache web pages, Cache-Control: no-store and Cache-Control: no-cache for HTTPS pages, were being ignored by Firefox 3. On a shared system, applications relying upon these HTTP directives could potentially expose private data. Another user on t...

Escaped null characters ignored by CSS parser — Mozilla

Kojima Hajime reported that unlike literal null characters which were handled correctly, the escaped form '\0' was ignored by the CSS parser and treated as if it was not present in the CSS input string. This issue could potentially be used to bypass script sanitization routines in web application...

Errors parsing URLs with leading whitespace and control characters — Mozilla

Perl developer Chip Salzenberg reported that certain control characters, when placed at the beginning of a URL, would lead to incorrect parsing resulting in a malformed URL being output by the parser. IBM researchers Justin Schuh, Tom Cross, and Peter William also reported a related symptom as pa...

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...

Image stealing via canvas and HTTP redirect — Mozilla

Mozilla developer Georgi Guninski reported that the canvas element could be used in conjunction with an HTTP redirect to bypass same-origin restrictions and gain access to the content in arbitrary images from other domains. This vulnerability could be used by an attacker to steal private...

Crashes with evidence of memory corruption (rv:1.8.1.15) — Mozilla

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

Crash in JavaScript garbage collector — Mozilla

Fixes for security problems in the JavaScript engine described in MFSA 2008-15 CVE-2008-1237 introduced a stability problem, where some users experienced crashes during JavaScript garbage collection. This is being fixed primarily to address stability concerns. We have no demonstration that this...

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...

Privilege escalation through chrome-loaded about:blank windows — Mozilla

Mozilla researcher mozbugra4 reported that a flaw was introduced by the fix for MFSA 2007-20 that could enable privilege escalation attacks against addons that create "about:blank" windows and populate them in certain ways including implicit "about:blank" document creation through data: or...

Privilege escalation using named-functions and redefined "new Object()" — Mozilla

mozbugra4 discovered that named JavaScript functions have a parent object created using the standard Object constructor ECMA-specified behavior and that this constructor can be redefined by script also ECMA-specified behavior. If the Object constructor is changed to return a reference to a...

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...

Privilege escalation through XUL persist. — Mozilla

In certain circumstances persisted XUL attributes are associated with the wrong URL. If an attacker can get a persisted string associated with an URL that will later eval or execute that attribute in a privileged context then the attacker's code will run with the full permissions of the browser...

Table Rebuilding Code Execution Vulnerability — Mozilla

An anonymous researcher for TippingPoint and the Zero Day Initiative reports that an invalid and nonsensical ordering of table-related tags causes Mozilla to use a negative array index. This invalid memory use can be exploited to run code of the attacker's choice...

Cross-site JavaScript injection using event handlers — Mozilla

shutdown reported a method of injecting running JavaScript code into a page on another site using a modal alert to suspend an event handler while a new page is being loaded. This vulnerability allows an attacker to steal any confidential information the new page might contain, including any...

Memory corruption via QueryInterface on Location, Navigator objects — Mozilla

Calling the QueryInterface method of the built-in Location and Navigator objects causes memory corruption that might be exploitable to run arbitrary code...

Script injection from Firefox sidebar panel using data: — Mozilla

Sites can use the search target to open links in the Firefox sidebar. A missing security check allows the sidebar to inject data: urls containing scripts into any page open in the browser. This could be used to steal cookies, passwords or other sensitive data...

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...

Security Vulnerabilities fixed in Firefox ESR 115.12 — Mozilla

Memory corruption in the networking stack could have led to a potentially exploitable crash. If a garbage collection was triggered at the right time, a use-after-free could have occurred during object transplant. By monitoring the time certain operations take, an attacker could have guessed which...

Security Vulnerabilities fixed in Firefox ESR 102.13 — Mozilla

An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. A website could have...

Security Vulnerabilities fixed in Firefox ESR 102.6 — Mozilla

A missing check related to tex units could have led to a use-after-free and potentially exploitable crash. An attacker who compromised a content process could have partially escaped the sandbox to read arbitrary files via clipboard-related IPC messages.This bug only affects Firefox for Linux. Oth...

Security vulnerabilities fixed in - Thunderbird 68.1.1 — Mozilla

A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted...

Use-after-free in DTLS during WebRTC session shutdown — Mozilla

Security researcher Looben Yang reported a use-after-free vulnerability in WebRTC. This occurs during WebRTC session shutdown when DTLS objects in memory are freed while still actively in use. This results in a potentially exploitable crash...

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...

Content provider permission bypass allows malicious application to access data — Mozilla

Security researcher Ken Okuyama reported an issue on Firefox for Android where a previously installed malicious application can access content provider permissions for Firefox in order to read data. This data includes browser history and locally saved passwords. This issue occurs when a list of...

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...

Firefox for Android addressbar can be removed after fullscreen mode — Mozilla

Security researcher Jordi Chancel reported when Firefox for Android exits fullscreen mode, it can be induce through script to not restore the addressbar when the window is redrawn in normal mode. This could allow an attacker to spoof the addressbar with their own content...

Use-after-free in Web Audio due to incorrect control message ordering — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG discovered a use-after-free in Web Audio due to an issue with how control messages for Web Audio are ordered and processed. This leads to a potentially exploitable crash...

Application Installation doorhanger persists on navigation — Mozilla

Mozilla developer Myk Melez reported that with specifically timed page navigation, the doorhanger notification for Web App installation could persist from one site to another without being dismissed by the navigation. This could be used by a malicious site to trick a user into installing an...

Touch events are shared across iframes — Mozilla

Mozilla developer Wesley Johnston reported that when there are two or more iframes on the same HTML page, an iframe is able to see the touch events and their targets that occur within the other iframes on the page. If the iframes are from the same origin, they can also access the properties and...

CSRF risk with plugins and 307 redirects — Mozilla

Independent security researcher Kuza55 and Microsoft security researcher Tom Gallagher reported that when plugin-initiated requests receive a 307 redirect response, the plugin is not notified and the request is forwarded to the new location. This is true even for cross-site redirects, so any cust...

Buffer overflow in JavaScript upvarMap — Mozilla

Security researcher Christian Holler reported that the JavaScript engine's internal memory mapping of non-local JS variables contained a buffer overflow which could potentially be used by an attacker to run arbitrary code on a victim's computer...

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...

DOM attribute cloning remote code execution vulnerability — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an error in the DOM attribute cloning routine where under certain circumstances an event attribute node can be deleted while another object still contains a reference to it. This reference could subsequently be accesse...

Use-after-free crash in HTML parser — Mozilla

Security researcher Alin Rad Pop of Secunia Research reported that the HTML parser incorrectly freed used memory when insufficient space was available to process remaining input. Under such circumstances, memory occupied by in-use objects was freed and could later be filled with attacker-controll...

URL spoofing with invisible control characters — Mozilla

Mozilla contributor Masahiro Yamada reported that certain invisible control characters were being decoded when displayed in the location bar, resulting in fewer visible characters than were present in the actual location. An attacker could use this vulnerability to spoof the location bar and...

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...

Memory corruption vulnerabilities (rv:1.8.1.10) — Mozilla

The Firefox 2.0.0.10 update contains fixes for three bugs that improve the stability of the product. These crashes showed some evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code...

XUL pages can hide the window titlebar — Mozilla

Mozilla developer Eli Friedman discovered that web pages written in the XUL markup language rather than the usual HTML can hide their window's titlebar. It may have been possible to abuse this ability to create more convincing spoof and phishing pages...

Frame spoofing while window is loading — Mozilla

Ronen Zilberman and Michal Zalewski both reported that it was possible to exploit a timing issue to inject content into about:blank frames in a page. When opening a window from a script, it is possible to spoof the content of the newly opened window's frames within a short time frame, while the...

Privilege escalation using watch point — Mozilla

Shutdown demonstrated that it was possible to use a JavaScript watch to gain elevated privilege. This could be used to compromise the user's computer and install malware...

Mozilla SVG Processing Remote Code Execution — Mozilla

Appending an SVG comment DOM node from one document into another type of document such as HTML in some cases results in a crash due to memory corruption that can be exploited to run arbitrary code...

Concurrency-related vulnerability — Mozilla

Jonathan Watt and Michal Zalewski independently reported timing dependent testcases that trigger crashes at the same place during text display. We have seen no demonstration that these crashes could be reliably exploited, but they do show evidence of memory corruption so we presume they could be...

Frame spoofing using document.open() — Mozilla

shutdown demonstrated a way to inject content into a sub-frame of another site using targetWindow.framesn.document.open, making the attackers content look like it was part of the victim site. Similar in effect to MFSA 2005-51...