Memory corruption involving scrolling — Mozilla

Security researcher Nils reported two potentially exploitable memory corruption bugs involving scrolling. The first was a use-after-free condition due to scrolling an image document. The second was due to nodes in a range request being added as children of two different parents...

Privileged content access and execution via XBL — Mozilla

Security researcher Mariusz Mlynski reported that it is possible to compile a user-defined function in the XBL scope of a specific element and then trigger an event within this scope to run code. In some circumstances, when this code is run, it can access content protected by System Only Wrappers...

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...

Use-after-free in Javascript Proxy objects — Mozilla

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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...

Miscellaneous memory safety hazards (rv:12.0/ rv:10.0.4) — 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...

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...

Crash when plugin removes itself on Mac OS X — Mozilla

FireBreath developer Richard Bateman reported a crash on Mac OS X that occurred when a plugin deletes its containing DOM frame during a call from that frame. The observed symptom is a null dereference but we cannot rule out the possibility that content from a scriptable plugin such as Flash could...

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...

Use-after-free error in JSON.stringify — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that a method used by JSON.stringify contained a use-after-free error in which a currently in-use pointer was freed and subsequently dereferenced. This could lead to arbitrary code execution if an attacker was able to...

Crash and remote code execution using HTML tags inside a XUL tree — Mozilla

Security researcher wushi of team509 reported that when a XUL tree had an HTML element nested inside a element then code attempting to display content in the XUL tree would incorrectly treat the element as a parent node to tree content underneath it resulting in incorrect indexes being calculated...

Heap buffer overflow in nsTextFrameUtils::TransformText — Mozilla

Security researcher wushi of team509 reported a heap buffer overflow in code routines responsible for transforming text runs. A page could be constructed with a bidirectional text run which upon reflow could result in an incorrect length being calculated for the run of text. When this value is...

Frameset integer overflow vulnerability — Mozilla

Security researcher Chris Rohlf of Matasano Security reported that the implementation of the HTML frameset element contained an integer overflow vulnerability. The code responsible for parsing the frameset columns used an 8-byte counter for the column numbers, so when a very large number of colum...

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...

XSS due to window.dialogArguments being readable cross-domain — Mozilla

Security researcher Hidetake Jo of Microsoft Vulnerability Research reported that the properties set on an object passed to showModalDialog were readable by the document contained in the dialog, even when the document was from a different domain. This is a violation of the same-origin policy and...

Compromise of SSL-protected communication — Mozilla

IOActive security researcher Dan Kaminsky reported a mismatch in the treatment of domain names in SSL certificates between SSL clients and the Certificate Authorities CA which issue server certificates. In particular, if a malicious person requested a certificate for a host name with an invalid...

Upgrade PNG library to fix memory safety hazards — Mozilla

Google security researcher Tavis Ormandy reported several memory safety hazards to the libpng project, an external library used by Mozilla to render PNG images. These vulnerabilities could be used by a malicious website to crash a victim's browser and potentially execute arbitrary code on their...

Peer-trusted certs can use alt names to spoof — Mozilla

Mozilla developer John G. Myers reported a weakness in the trust model used by Mozilla regarding alternate names on self-signed certificates and those with mismatched names that if accepted could be used to spoof a secure connection to any other site. This problem was independently reported by...

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...

Javascript "lambda" replace exposes memory contents — Mozilla

A bug in javascript's regular expression string replacement when using an anonymous function as the replacement argument allows a malicious script to capture blocks of memory allocated to the browser. A web site could capture data and transmit it to a server without user interaction or knowledge...

Security Vulnerabilities fixed in Thunderbird 131 — 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 102.11 — Mozilla

In multiple cases browser prompts could have been obscured by popups controlled by content. These could have led to potential user confusion and spoofing attacks. An out-of-bound read could have led to a crash in the RLBox Expat driver. A missing delay in popup notifications could have made it...

Security Vulnerabilities fixed in Firefox ESR 91.12 — 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...

Security Vulnerabilities fixed in Firefox ESR 91.10 — Mozilla

A malicious website could have learned the size of a cross-origin resource that supported Range requests. A malicious webpage could have caused an out-of-bounds write in WebGL, leading to memory corruption and a potentially exploitable crash. When exiting fullscreen mode, an iframe could have...

Security vulnerabilities fixed in Firefox ESR 45.4 — Mozilla

An out-of-bounds write of a boolean value during text conversion with some unicode characters A bad cast when processing layout with input elements can result in a potentially exploitable crash. A use-after-free vulnerability triggered by setting a aria-owns attribute. A use-after-free issue in w...

Type confusion in display transformation — Mozilla

Using the Address Sanitizer tool, security researcher Nils reported a type confusion flaw in display transformation during rendering due to incorrect bounds checking. This leads to a potentially exploitable crash and can be triggered by web content...

Arbitrary file manipulation by local user through Mozilla updater and callback application path parameter — Mozilla

Security researcher Holger Fuhrmannek reported that when the Updater is opened directly using the callback application path parameter, a copy of a user specified file is made as a callback file. If the target of this file is made with a locked hardlink, an arbitrary local file can be replaced on...

Addressbar spoofing with right-to-left characters on Firefox for Android — Mozilla

Security researcher Rafay Baloch reported a mechanism to spoof the addressbar in Firefox for Android using right-to-left character sets when combined with left-to-right characters. This can be used to cause only certain portions of the loaded left-to-right character portion of the URL to be...

Use-after-free deleting tables from a contenteditable document — Mozilla

Security researcher firehack used the Address Sanitizer tool to discover a use-after-free in contenteditable mode. This occurs when deleting document object model DOM table elements created within the editor and results in a potentially exploitable crash...

Elevation of privilege with chrome.tabs.update API in web extensions — Mozilla

Security researcher Muneaki Nishimura nishimunea of Recruit Technologies Co., Ltd. reported that the chrome.tabs.update API for web extensions allows for navigation to javascript: URLs without additional permissions. This can used to elevate privilege for a universal cross-site scripting XSS atta...

Write to invalid HashMap entry through JavaScript.watch() — Mozilla

The CESG, the Information Security Arm of GCHQ, reported that the JavaScript .watch method could be used to overflow the 32-bit generation count of the underlying HashMap, resulting in a write to an invalid entry. Under the right conditions this write could lead to arbitrary code execution. The...

Memory corruption with malicious NPAPI plugin — Mozilla

The CESG, the Information Security Arm of GCHQ, reported a dangling pointer dereference within the Netscape Plugin Application Programming Interface NPAPI that could lead to the NPAPI subsystem crashing. This issue requires a maliciously crafted NPAPI plugin in concert with scripted web content,...

Use-after-free during XML transformations — Mozilla

Security researcher Nicolas Grégoire used the Address Sanitizer to find a use-after-free during XML transformation operations. This results in a potentially exploitable crash triggerable by web content...

Addressbar spoofing though history navigation and Location protocol property — Mozilla

Security researcher Tsubasa Iinuma reported a mechanism where the displayed addressbar can be spoofed to users. This issue involves using history navigation in concert with the Location protocol property. After navigating from a malicious page to another, if the user navigates back to the initial...

Addressbar spoofing attacks — Mozilla

Security researcher Jordi Chancel reported two issues involving addressbar spoofing...

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...

Errors in the handling of CORS preflight request headers — Mozilla

Mozilla developer Ehsan Akhgari reported two issues with Cross-origin resource sharing CORS "preflight" requests...

Type confusion in Indexed Database Manager — Mozilla

Security researcher Paul Bandha reported a type confusion error where part of IDBDatabase is read by the Indexed Database Manager and incorrectly used as a pointer when it shouldn't be used as such. This leads to memory corruption and the possibility of an exploitable crash...

Buffer overflow and out-of-bounds read while parsing MP4 video metadata — Mozilla

Security researcher laf.intel reported a buffer overflow and out-of-bounds read in the libstagefright library while parsing invalid metadata in MPEG4 video files. This can lead to a potentially exploitable crash...

Miscellaneous memory safety hazards (rv:38.0 / rv:31.7) — Mozilla

Mozilla developers and community 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 the...

Same-origin bypass through anchor navigation — Mozilla

Mozilla developer Olli Pettay reported that while investigating Mozilla Foundation Security Advisory 2015-28, he and Mozilla developer Boris Zbarsky found an alternate way to trigger a similar vulnerability. The previously reported flaw used an issue with SVG content navigation to bypass...

Buffer overflow during CSS restyling — Mozilla

Security researcher Atte Kettunen used the Address Sanitizer tool to discover an out-of-bounds read during the application of restyling and reflowing changes of web content using CSS. This results in a potentially exploitable crash...

Uninitialized memory use during bitmap rendering — Mozilla

Google security researcher Michal Zalewski reported that when a malformed bitmap image is rendered by the bitmap decoder within a element, memory may not always be properly initialized. The resulting image then uses this uninitialized memory during rendering, allowing data to potentially leak to...

Use-after-free interacting with text directionality — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free during text layout when interacting with text direction. This results in a crash which can lead to arbitrary code execution...

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...

Memory corruption in workers — Mozilla

Security researcher Nils used the Address Sanitizer tool while fuzzing to discover a memory corruption issue with the JavaScript engine when using workers with direct proxies. This results in a potentially exploitable crash...

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...

File input control has access to full path — Mozilla

Mozilla security researcher mozbugra4 reported a mechanism to exploit the control when set to the file type in order to get the full path. This can lead to information leakage and could be combined with other exploits to target attacks on the local file system...

Privilege escalation through Mozilla Maintenance Service — Mozilla

Security researcher Frédéric Hoguin discovered that the Mozilla Maintenance Service on Windows was vulnerable to a buffer overflow. This system is used to update software without invoking the User Account Control UAC prompt. The Mozilla Maintenance Service is configured to allow unprivileged user...

HTTPMonitor extension allows for remote debugging without explicit activation — Mozilla

Mozilla security researcher Mark Goodwin discovered an issue with the Firefox developer tools' debugger. If remote debugging is disabled, but the experimental HTTPMonitor extension has been installed and enabled, a remote user can connect to and use the remote debugging service through the port...