RSA Signature Forgery — Mozilla

Philip Mackenzie and Marius Schilder of Google informed us of Daniel Bleichenbacher's recent presentation of a common implementation error in RSA signature verification, a failure to account for extra data in the signature. For signatures with a small exponent such as 3 it is possible for an...

JavaScript execution in mail via XBL — Mozilla

Georgi Guninski demonstrated that even with JavaScript disabled in mail the default an attacker can still execute JavaScript when a mail message is viewed, replied to, or forwarded by putting the script in a remote XBL file loaded by the message. The executed script could be used to alter or chan...

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...

Crashes with evidence of memory corruption (rv:1.8.0.5) — Mozilla

As part of the Firefox 1.5.0.5 stability and security release, developers in the Mozilla community looked for and fixed several crash bugs to improve the stability of Mozilla clients. Some of these crashes showed evidence of memory corruption that we presume could be exploited to run arbitrary co...

File stealing by changing input type — Mozilla

Claus Jörgensen reports that a text input box can be pre-filled with a filename and then turned into a file-upload control with the contents intact, allowing a malicious website the ability to steal any local file whose name they can guess...

Changing position:relative to static corrupts memory — Mozilla

Dynamically changing the style of an element from position:relative to position:static can cause Gecko to operate on freed memory. It may be possible to exploit this in order to run arbitrary code...

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...

Security Vulnerabilities fixed in Firefox for iOS 152.0 — Mozilla

Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in...

Security Vulnerabilities fixed in Thunderbird 137.0.2 — Mozilla

Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validate...

Security Vulnerabilities fixed in Thunderbird 128.2 — Mozilla

When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a potentially exploitable crash. A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. A...

Security Vulnerabilities fixed in Thunderbird 128.1 — Mozilla

Select options could obscure the fullscreen notification dialog. This could be used by a malicious site to perform a spoofing attack. 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....

Security Vulnerabilities fixed in Firefox ESR 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 for iOS 127 — Mozilla

In certain scenarios a malicious website could attempt to display a fake location URL bar which could mislead users as to the actual website address When browsing private tabs, some data related to location history or webpage thumbnails could be persisted incorrectly within the sandboxed app bund...

Timing side-channel in PKCS#1 v1.5 decryption depadding code — Mozilla

The NSS code used for checking PKCS1 v1.5 was leaking information useful in mounting Bleichenbacher-like attacks. Both the overall correctness of the padding as well as the length of the encrypted message was leaking through timing side-channel. By sending large number of attacker-selected...

Security Vulnerabilities fixed in Firefox for iOS 119 — Mozilla

When opening a page in reader mode, the redirect URL could have caused attacker-controlled script to execute in a reflected Cross-Site Scripting XSS attack...

Security Vulnerabilities fixed in Firefox for iOS 115 — Mozilla

The permission request prompt from the site in the background tab was overlaid on top of the site in the foreground tab. The session restore helper crashed whenever there was no parameter sent to the message handler...

Insecure Sharing of HTML/JS Files in Hubs Cloud Reticulum — Mozilla

Hubs Cloud allows users to download shared content, specifically HTML and JS, which could allow javascript execution in the Hub Cloud instance’s primary hosting domain...

Privilege escalation through file deletion by Maintenance Service updater — Mozilla

Security researcher Holger Fuhrmannek reported an issue where the Mozilla Maintenance Service updater on Windows can delete arbitrary files because of its privileged system access. This file deletion can then potentially be used for further privilege escalation. This flaw requires users to execut...

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...

Reader Mode pages have chrome privileges — Mozilla

Security researcher Warren He reported that when a page is transitioned into Reader Mode in Firefox for Android, the resulting page has chrome privileges and its content is not thoroughly sanitized. A successful attack requires user enabling of reader mode for a malicious page, which could then...

Information stealing via form history — Mozilla

Security researcher Paul Stone reported that a Java applet could be used to mimic interaction with form autocomplete controls and steal entries from the form history...

ParanoidFragmentSink allows javascript: URLs in chrome documents — Mozilla

Security researcher Roberto Suggi Liverani reported that ParanoidFragmentSink, a class used to sanitize potentially unsafe HTML for display, allows javascript: URLs and other inline JavaScript when the embedding document is a chrome document. While there are no unsafe uses of this class in any...

Buffer overflow while line breaking after document.write with long string — Mozilla

Dirk Heinrich reported that on Windows platforms when document.write was called with a very long string a buffer overflow was caused in line breaking routines attempting to process the string for display. Such cases triggered an invalid read past the end of an array causing a crash which an...

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...

Scriptable plugin execution in SeaMonkey mail — Mozilla

Security researcher Georgi Guninski reported that scriptable plugin content, such as Flash objects, could be loaded and executed in SeaMonkey mail messages by embedding the content in an iframe inside the message. If a user were to reply to or forward such a message, malicious JavaScript embedded...

NTLM reflection vulnerability — Mozilla

Security researcher Takehiro Takahashi of the IBM X-Force reported that Mozilla's NTLM implementation was vulnerable to reflection attacks in which NTLM credentials from one application could be forwarded to another arbitrary application via the browser. If an attacker could get a user to visit a...

Chrome privilege escalation due to incorrectly cached wrapper — Mozilla

Mozilla add-on developer and community member Wladimir Palant reported broken functionality on pages that had a Link: HTTP header when an add-on was installed which implemented a Content Policy in JavaScript, such as AdBlock Plus or NoScript. Mozilla security researcher mozbugra4 demonstrated tha...

Arbitrary code execution via XUL tree element — Mozilla

Security researcher Nils reported via TippingPoint's Zero Day Initiative that the XUL tree method moveToEdgeShift was in some cases triggering garbage collection routines on objects which were still in use. In such cases, the browser would crash when attempting to access a previously destroyed...

Mozilla Firefox XUL Linked Clones Double Free Vulnerability — Mozilla

An anonymous researcher, via TippingPoint's Zero Day Initiative program, reported a vulnerability in Mozilla's garbage collection process. The vulnerability was caused by improper memory management of a set of cloned XUL DOM elements which were linked as a parent and child. After reloading the...

XSS vulnerabilities in SessionStore — Mozilla

Mozilla security researcher mozbugra4 reported vulnerabilities in the session-restore feature by which content could be injected into an incorrect document storage location, including storage locations for other domains. An attacker could utilize these issues to violate the browser's same-origin...

Signed JAR tampering — Mozilla

Security researchers Collin Jackson and Adam Barth reported a series of vulnerabilities which allow JavaScript to be injected into the context of signed JARs and executed under the context of the JAR's signer. This could allow an attacker to run JavaScript in a victim's browser with the privilege...

Code execution via QuickTime Media-link files — Mozilla

On his blog Petko D. Petkov reported that QuickTime Media-Link files contain a qtnext attribute that could be used on Windows systems to launch the default browser with arbitrary command-line options. When the default browser is Firefox 2.0.0.6 or earlier use of the -chrome option allowed a remot...

XUL Popup Spoofing — Mozilla

Chris Thomas demonstrated that XUL popups opened by web content could be placed outside the boundaries of the content area. This could be used to spoof or hide parts of the browser chrome such as the location bar...

RSA Signature Forgery (variant) — Mozilla

MFSA 2006-60 reported that RSA digital signatures with a low exponent typically 3 could be forged. This flaw was corrected in the Mozilla Network Security Services NSS library version 3.11.3 used by Firefox 2.0 and current development versions of Mozilla clients...

HTTP response smuggling — Mozilla

Kazuho Oku of Cybozu Labs reports via the Information-technology Promotion Agency, Japan, that Firefox is vulnerable to HTTP response smuggling when used with certain proxy servers...

Privilege escalation using a JavaScript function's cloned parent — Mozilla

shutdown discovered it was possible to use the Object.watch method to access an internal function object the "clone parent" which could then be used to run arbitrary JavaScript code with full permission. This could be used to install malware such as password sniffers or viruses...

Code execution through shared function objects — Mozilla

Improper cloning of base objects allowed web content scripts to walk up the prototype chain to get to a privileged object. This could be used to execute code with enhanced privileges...

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 for iOS 151.2 — Mozilla

Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. Firefox for iOS Reader Vi...

Security Vulnerabilities fixed in Firefox 150.0.2 — Mozilla

Memory safety bugs present in Firefox ESR 115.35.1, Firefox ESR 140.10.1 and Firefox 150.0.1. 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 150.0.1...

Security Vulnerabilities fixed in Firefox 150 — Mozilla

Memory safety bugs present in Firefox 149 and Thunderbird 149. 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 115.34, Firefox ESR 140.9,...

Security Vulnerabilities fixed in Firefox ESR 115.15 — Mozilla

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the with environment. Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. Web content that tried t...

Security Vulnerabilities fixed in Thunderbird 115.15 — Mozilla

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the with environment. Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. Web content that tried t...

Security Vulnerabilities fixed in Thunderbird 115.4.1 — Mozilla

It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an insufficient activation-delay. An attacker could have created a malicious link using bidirectional characters to spoof the location in the address bar when visited. Drivers a...

Insecure Proxy Configuration in Hubs Cloud Reticulum — Mozilla

Proxy functionality built into Hubs Cloud’s Reticulum software allowed access to internal URLs, including the metadata service...

Security Vulnerabilities fixed in Firefox for iOS 27 — Mozilla

IndexedDB should be cleared when leaving private browsing mode and it is not, the API for WKWebViewConfiguration was being used incorrectly and requires the private instance of this object be deleted when leaving private mode...

Remote HTML tag injection in Gaia System app — Mozilla

Security researcher Muneaki Nishimura reported an issue with Gaia's System app which allows an attacker to inject HTML code into the System app's context via specially-crafted search links. The injection occurs when the user opens such malicious link in the browser and then presses the HOME butto...

GC hazard with default compartments and frame chain restoration — Mozilla

Security researcher Nils reported a potentially exploitable use-after-free in an early test version of Firefox 25. Mozilla developer Bobby Holley found that the cause was an older garbage collection bug that a more recent change made easier to trigger...

Java security bypass from LiveConnect loaded via data: URL meta refresh — Mozilla

Security researcher Gregory Fleischer reported that when a Java LiveConnect script was loaded via a data: URL which redirects via a meta refresh, then the resulting plugin object was created with the wrong security principal and thus received elevated privileges such as the abilities to read loca...

Arbitrary code execution using SJOW and fast native function — Mozilla

Mozilla security researcher mozbugra4 reported that when content script which is running in a chrome context accesses a content object via SJOW, the content code can gain access to an object from the chrome scope and use that object to run arbitrary JavaScript with chrome privileges...