Chrome privilege escalation with FeedWriter — Mozilla

Mozilla security researcher mozbugra4 reported that the BrowserFeedWriter could be leveraged to run JavaScript code from web content with elevated privileges. Using this vulnerability, an attacker could construct an object containing malicious JavaScript and cause the FeedWriter to process the...

Faulty .properties file results in uninitialized memory being used — Mozilla

Mozilla developer Daniel Glazman demonstrated that an improperly encoded .properties file in an add-on can result in uninitialized memory being used. This could potentially result in small chunks of data formerly used by other programs being exposed to the add-on code. If the localized string wer...

Arbitrary file upload via originalTarget and DOM Range — Mozilla

Opera Software reported a vulnerability which allows malicious content to force the browser into uploading local files to the remote server. This could be used by an attacker to steal files from known locations on a victim's computer...

URL token stealing via stylesheet redirect — Mozilla

Security researcher Martin Straka reported that Gecko-based browsers update the .href property of stylesheet DOM nodes to reflect the final URI of the stylesheet after following any 302 redirects much as the document.location property is updated. This differs from other browsers and could...

Referer-spoofing via window.location race condition — Mozilla

Gregory Fleischer demonstrated that it was possible to generate a fake HTTP Referer header by exploiting a timing condition when setting the window.location property. This could be used to conduct a Cross-site Request Forgery CSRF attack against websites that rely only on the Referer header as...

onUnload Tailgating — Mozilla

Michal Zalewski demonstrated that onUnload event handlers had access to the address of the new page about to be loaded, even if the navigation was triggered from outside the page content such as by using a bookmark, pressing the back button, or typing an address into the location bar. If the...

Path Abuse in Cookies — Mozilla

Nicolas Derouet reported two problems with cookie handling in Mozilla clients. The first was that the cookie path parameter was not subject to any length checks, and this could be abused to cause the victim's browser to use excessive amounts of memory while it was running as well as waste the dis...

Privilege escalation using addSelectionListener — Mozilla

Web content could access the nsISelectionPrivate interface of the Selection object and use it to add a SelectionListener. The listener would be called when the user did a "Find" on the page or a "select all", and as intended this shouldn't cause any problems. But as with escaping the PAC sandbox ...

Integer overflows in E4X, SVG, and Canvas — Mozilla

Georgi Guninski reports integer overflows in the new E4X, SVG, and Canvas features. These lead to memory corruption that is potentially exploitable to run arbitrary code...

Security Vulnerabilities fixed in Firefox for iOS 151.0 — Mozilla

Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies...

Security Vulnerabilities fixed in Firefox 151 — Mozilla

Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed...

Security Vulnerabilities fixed in Firefox 138.0.4 — Mozilla

An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes...

Security Vulnerabilities fixed in Thunderbird 115.14 — Mozilla

Insufficient checks when processing graphics shared memory could have led to memory corruption. This could be leveraged by an attacker to perform a sandbox escape. Incomplete WebAssembly exception handing could have led to a use-after-free. Editor code failed to check an attribute value. This cou...

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 for iOS 124 — Mozilla

Dragging Javascript URLs to the address bar could cause them to be loaded, bypassing restrictions and security protections If an insecure element was added to a page after a delay, Firefox would not replace the secure icon with a mixed content security status...

Reading sensitive profile files through local HTML file on Android — Mozilla

Security researcher Jordi Chancel reported an issue in Firefox for Android where a locally saved HTML file could use file: URIs to trigger the download of additional files or opening of cached profile data without user awareness...

JavaScript immutable property enforcement can be bypassed — Mozilla

Mozilla developer Jeff Walden reported that in Gecko's implementation of ECMAScript 5 API's enforces non-configurable properties with logic specific to each API. Scripts that do not go through these APIs can bypass these protections and make changes to the immutable properties in violation of...

Buffer overflow in JavaScript atom map — Mozilla

Security researcher Christian Holler reported that the JavaScript engine's internal mapping of string values contained an error in cases where the number of values being stored was above 64K. In such cases an offset pointer was manually moved forwards and backwards to access the larger address...

Memory corruption during text run construction (Windows) — Mozilla

Alex Miller reported that when very long strings were constructed and inserted into an HTML document, the browser would incorrectly construct the layout objects used to display the text. Under such conditions an incorrect length would be calculated for a text run resulting in too small of a memor...

setTimeout loses XPCNativeWrappers — Mozilla

Mozilla developer Blake Kaplan reported that setTimeout, when called with certain object parameters which should be protected with a XPCNativeWrapper, will fail to keep the object wrapped when compiling the new function to be executed. If chrome privileged code were to call setTimeout using this ...

Crash and remote code execution during Flash player unloading — Mozilla

Security researcher Attila Suszter reported that when a page contains a Flash object which presents a slow script dialog, and the page is navigated while the dialog is still visible to the user, the Flash plugin is unloaded resulting in a crash due to a call to the deleted object. This crash coul...

Incorrect principal set for file: resources loaded via location bar — Mozilla

Security researchers Adam Barth and Collin Jackson reported that when a file: resource is loaded via the location bar it inherits the principal of the previously loaded document. This vulnerability can potentially give the newly loaded document additional privileges to access the contents of othe...

Information stealing via local shortcut files — Mozilla

Security researcher Liu Die Yu of TopsecTianRongXin reported that locally saved .url shortcut files could be used to read information stored in the local cache. An attacker could use this vulnerability to steal information from a victim's browser cache if they were able to get the victim to...

XSS through JavaScript same-origin violation — Mozilla

Mozilla contributor mozbugra4 submitted a set of vulnerabilities which allow scripts from one document to be executed in the context of a different document. These vulnerabilities could be used by an attacker to violate the same-origin policy and perform an XSS attack against arbitrary sites,...

Multiple XSS vulnerabilities from character encoding — Mozilla

WebKit developer Alexey Proskuryakov reported that the Mozilla HTML parser treated the backspace character as whitespace contrary to the HTML specification and different from other browsers. This difference might lead to Cross-site Scripting XSS risks on sites which filtered input in accordance...

Crashes with evidence of memory corruption (rv:1.8.1.8) — Mozilla

As part of the Firefox 2.0.0.8 update releases Mozilla developers fixed many bugs to improve the stability of the product. 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 exploited to run...

Privilege escallation using an event handler attached to an element not in the document — Mozilla

An attacker can use an element outside of a document to call an event handler allowing content to run arbitrary code with chrome privileges...

Crashes with evidence of memory corruption (rv:1.8.0.12/1.8.1.4) — Mozilla

As part of the Firefox 2.0.0.4 and 1.5.0.12 update releases Mozilla developers fixed many bugs to improve the stability of the product. Some of these crashes that showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could b...

Crashes with evidence of memory corruption (rv:1.8.0.10/1.8.1.2) — Mozilla

As part of the Firefox 2.0.0.2 and 1.5.0.10 update releases we fixed several bugs to improve the stability of the product. Some of these were crashes that showed evidence of memory corruption and we presume that with enough effort at least some of these could be exploited to run arbitrary code...

JavaScript Regular Expression Heap Corruption — Mozilla

Priit Laes reported a crash due to a heap buffer overflow triggered by a JavaScript regular expression containing a minimal quantifier. We presume this could be exploited to run arbitrary code...

PAC privilege escalation using Function.prototype.call — Mozilla

mozbugra4 reports that a malicious Proxy AutoConfig PAC server could serve a PAC script that can execute code with elevated privileges by setting the required FindProxyForURL function to the eval method on a privileged object that leaked into the PAC sandbox. By redirecting the victim to a...

Double-free on malformed VCard — Mozilla

Masatoshi Kimura reported a hang caused by a double-free in Thunderbird when processing a large VCard with invalid base64 characters in it. Since an attacker can supply an arbitrary amount of well-formed VCard data before introducing the error we presume this could be exploited to run code of the...

Deleted object reference when designMode="on" — Mozilla

Martijn Wargers and Nick Mott each described crashes that were discovered to ultimately stem from the same root cause: attempting to use a deleted controller context when designMode was turned on. This generally results in crashing the browser, but in theory references to deleted objects can be...

Mozilla Firefox Tag Order Vulnerability — Mozilla

A particular sequence of HTML tags that reliably crash Mozilla clients was reported by an anonymous researcher via TippingPoint and the Zero Day Initiative. The crash is due to memory corruption that can be exploited to run arbitrary code...

Security Vulnerabilities fixed in Thunderbird 128.10.1 — Mozilla

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an invalid value "Spoofed Name [email protected] [email protected]", Thunderbird treats [email protected] as the...

Security Vulnerabilities fixed in Thunderbird 133 — Mozilla

Certain WebGL operations on Apple silicon M series devices could have lead to an out-of-bounds write and memory corruption due to a flaw in Apple's GPU driver. This bug only affected the application on Apple M series hardware. Other platforms were unaffected. Malicious websites may have been able...

Upper bound check bypass due to signed compare in SharedBufferManagerParent::RecvAllocateGrallocBuffer — Mozilla

Mozilla intern Julian Hector discovered a regression in the graphics buffer management of Firefox OS's graphics layer that would lead to graphics memory corruption by providing negative size parameters. JavaScript can not access the graphics layer in a way required to trigger this vulnerability,...

Buffer overflow in Gamepad API — Mozilla

Security researcher Looben Yang reported a buffer overflow in Gamepad API when it is exercised with a gamepad device with non-contiguous axes. This can be either an actual physical device or by the installation of a virtual gamepad. This results in a potentially exploitable crash. The Gamepad API...

Same-origin bypass using canvas context — Mozilla

Mozilla developer Vladimir Vukicevic reported that a canvas element can be used to read data from another site, violating the same-origin policy. The read restriction placed on a canvas element which has had cross-origin data rendered into it can be bypassed by retaining a reference to the canvas...

Integer overflow, crash in libtheora video library — Mozilla

Security researcher Dan Kaminsky reported an integer overflow in the Theora video library. A video's dimensions were being multiplied together and used in particular memory allocations. When the video dimensions were sufficiently large, the multiplication could overflow a 32-bit integer resulting...

Heap overflow in certificate regexp parsing — Mozilla

Moxie Marlinspike reported a heap overflow vulnerability in the code that handles regular expressions in certificate names. This vulnerability could be used to compromise the browser and run arbitrary code by presenting a specially crafted certificate to the client. This code provided compatibili...

POST data sent to wrong site when saving web page with embedded frame — Mozilla

Developer and Mozilla community member Paolo Amadini reported that when saving the inner frame of a web page as a file when the outer page has POST data associated with it, the POST data will be incorrectly sent to the URL of the inner frame. This could potentially result in a user's sensitive da...

Chrome privilege escalation via local .desktop files — Mozilla

Mozilla security researcher Georgi Guninski reported that the fix for an earlier vulnerability reported by Liu Die Yu using local internet shortcut files to access other sites MFSA 2008-47 could be bypassed by redirecting to a privileged about: URI such as about:plugins. If an attacker could get ...

Crashes with evidence of memory corruption (rv:1.9.0.5/1.8.1.19) — 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...

nsXMLHttpRequest::NotifyEventListeners() same-origin violation — Mozilla

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

XSS and JavaScript privilege escalation via session restore — Mozilla

Security researcher David Bloom reported that the browser's session restore feature can be used to violate the same-origin policy and run JavaScript in the context of another site. Any otherwise unexploitable crash can be used to force the user into the session restore state...

Heap overflow when canceling newsgroup message — Mozilla

Georgi Guninski reported a buffer overflow in the handling of cancelled newsgroup messages. The error was caused by too small a heap buffer being allocated to store message header information. This buffer could be overrun by an attacker using a specially crafted message which could crash the mail...

Privilege escalation using feed preview page and XSS flaw — Mozilla

Mozilla security researcher mozbugra4 reported a series of vulnerabilities in feedWriter which allow scripts from page content to run with chrome privileges...

Multiple file input focus stealing vulnerabilities — Mozilla

Security researchers hong and Gregory Fleischer each reported a variant on earlier reported bugs regarding focus shifting in file input controls. Their variants used file input controls nested inside tags to take advantage of automatic focus shifting into the file input field noted on the Hacker...

Upgraded Thunderbird 1.5.0.13 missing fix for MFSA 2007-23 — Mozilla

Mozilla tester Stephen Donner reported that only users who installed Thunderbird 1.5.0.13 using the install package received the fix for MFSA 2007-23. Users who upgraded to Thunderbird 1.5.0.13 from an earlier version using the automatic update mechanism were not protected. If those users browsed...