Potential memory corruption during font rendering using cairo-dwrite — Mozilla

Security research firm iDefense reported that researcher wushi of team509 discovered a memory corruption on Windows Vista and Windows 7 systems with hardware acceleration disabled or using incompatible video drivers. This is created by using cairo-dwrite to attempt to render fonts on an unsupport...

WebGL.drawElements may read illegal video memory due to FindMaxUshortElement error — Mozilla

Mozilla community member Matias Juntunen discovered an error in WebGLBuffer where FindMaxElementInSubArray receives wrong template arguments from FindMaxUshortElement. This bug causes maximum index to be computed incorrectly within WebGL.drawElements, allowing the reading of illegal video memory...

XSS with Drag and Drop and Javascript: URL — Mozilla

Firefox prevents the dropping of javascript: links onto a frame to prevent malicious sites from tricking users into performing a cross-site scripting XSS attacks on themselves. Security researcher Soroush Dalili reported a way to bypass this protection...

<iframe> element exposed across domains via name attribute — Mozilla

Vitaly Nevgen reported that an attacker could replace a sub-frame in another domain's document by using the name attribute of the sub-frame as a form submission target. This can potentially allow for phishing attacks against users and violates the HTML5 frame navigation policy...

Use after free reading OGG headers — Mozilla

sczimmer reported that Firefox crashed when loading a particular .ogg file. This was due to a use-after-free condition and could potentially be exploited to install malware...

Code installation through holding down Enter — Mozilla

Mariusz Mlynski reported that if you could convince a user to hold down the Enter key--as part of a game or test, perhaps--a malicious page could pop up a download dialog where the held key would then activate the default Open action. For some file types this would be merely annoying the equivale...

Multiple dangling pointer vulnerabilities — Mozilla

Security researcher regenrecht reported several dangling pointer vulnerabilities via TippingPoint's Zero Day Initiative...

nsCSSValue::Array index integer overflow — Mozilla

Security researcher J23 reported via TippingPoint's Zero Day Initiative that an array class used to store CSS values contained an integer overflow vulnerability. The 16 bit integer value used in allocating the size of the array could overflow, resulting in too small a memory buffer being created...

Heap buffer overflow in nsGenericDOMDataNode::SetTextInternal — Mozilla

Security researcher Nils of MWR InfoSecurity reported that the routine for setting the text value for certain types of DOM nodes contained an integer overflow vulnerability. When a very long string was passed to this routine, the integer value used in creating a new memory buffer to hold the stri...

Update NSS to support TLS renegotiation indication — Mozilla

Mozilla developers added support in the Network Security Services module for preventing a type of man-in-the-middle attack against TLS using forced renegotiation...

Security Vulnerability fixed in Firefox 131.0.2, Firefox ESR 128.3.1, Firefox ESR 115.16.1 — Mozilla

An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild...

Security Vulnerabilities fixed in Firefox ESR 102.15 — Mozilla

When receiving rendering data over IPC mStream could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. When creating a callback over IPC for showing the Color Picker window, multiple of the same callbacks could have been create...

Security Vulnerabilities fixed in Firefox ESR 78.10.1 — Mozilla

The Mozilla Maintenance Service granted SERVICESTART access to BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. This could be used to prevent the browser update service from operating if an attacker spammed the 'Stop' command; but also...

Security vulnerabilities fixed in - Thunderbird 68.1 — Mozilla

Encrypted S/MIME parts in a crafted multipart/alternative message can leak plaintext when included in a a HTML reply/forward. A use-after-free vulnerability can occur while manipulating video elements if the body is freed while still in use. This results in a potentially exploitable crash. Some...

Security vulnerabilities fixed in Thunderbird 60.5.1 — Mozilla

A use-after-free vulnerability in the Skia library can occur when creating a path, leading to a potentially exploitable crash. An integer overflow vulnerability in the Skia library can occur after specific transform operations, leading to a potentially exploitable crash. A buffer overflow...

Buffer overflow in ClearKey Content Decryption Module (CDM) during video playback — Mozilla

An anonymous security researcher working with Trend Micro's Zero Day Initiative reported a buffer overflow in the ClearKey Content Decryption Module CDM used by the Encrypted Media Extensions EME API. This vulnerability can be triggered using a malformed video file due to incorrect error handling...

Miscellaneous memory safety hazards (rv:45.0 / rv:38.7) — Mozilla

Mozilla developers 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 exploited to run...

Same-origin policy violation using performance.getEntries and history navigation — Mozilla

Security researcher cgvwzq reported that it is possible to read cross-origin URLs following a redirect if performance.getEntries is used along with an iframe to host a page. Navigating back in history through script, content is pulled from the browser cache for the redirected location instead of...

Use-after-free in Content Policy due to microtask execution error — Mozilla

Security researcher Herre reported a use-after-free vulnerability when a Content Policy modifies the Document Object Model to remove a DOM object, which is then used afterwards due to an error in microtask implementation. This leads to an exploitable crash...

ECDSA signature validation fails to handle some signatures correctly — Mozilla

Mozilla community member Watson Ladd reported that the implementation of Elliptical Curve Cryptography ECC multiplication for Elliptic Curve Digital Signature Algorithm ECDSA signature validation in Network Security Services NSS did not handle exceptional cases correctly. This could potentially...

Buffer overflow with SVG content and CSS — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen found a buffer overflow during the rendering of SVG format graphics when combined with specific CSS properties on a page. This results in a potentially exploitable crash...

Windows can retain access to privileged content on navigation to unprivileged pages — Mozilla

Mozilla developer Bobby Holley reported that windows created to hold privileged UI content retained access to privileged internal methods if later navigated to unprivileged content. If a separate flaw was found that allowed for web content to reference these privileged windows, an attacker could...

Crash using DrawTarget in Cairo graphics library — Mozilla

Security researcher Atte Kettunen used the Address Sanitizer tool to discover a crash while drawing images through the Cairo graphics library while using the DrawTarget function. This can result in a segmentation fault due to zero-ing out of memory outside the bounds of the image...

Use-after-free in IndexedDB — Mozilla

Security researcher Paul Bandha used the used the Address Sanitizer tool to discover a use-after-free vulnerability when running specific web content with IndexedDB to create an index. This leads to a potentially exploitable crash...

Buffer overflow in Web Audio Speex resampler — Mozilla

Security researcher Holger Fuhrmannek used the used the Address Sanitizer tool to discover a buffer overflow with the Speex resampler in Web Audio when working with audio content that exceeds expected bounds. This leads to a potentially exploitable crash...

Information disclosure through polygon rendering in MathML — Mozilla

Security researcher Tyson Smith and Jesse Schwartzentruber of the BlackBerry Security Automated Analysis Team used the Address Sanitizer tool while fuzzing to discover an out-of-bounds read during polygon rendering in MathML. This can allow web content to potentially read protected memory...

Linux clipboard information disclosure though selection paste — Mozilla

Mozilla community member Vincent Lefevre reported that on Linux systems, web content can access data saved to the clipboard when a user attempts to paste a selection with a middle-click instead of pasting the selection content. This allows for possibly private data in the clipboard to be...

Sandbox restrictions not applied to nested object elements — Mozilla

Mozilla security developer Daniel Veditz discovered that restrictions are not applied to an element contained within a sandboxed iframe. This could allow content hosted within a sandboxed iframe to use element to bypass the sandbox restrictions that should be applied...

Compartment mismatch re-attaching XBL-backed nodes — Mozilla

Security researcher Sachin Shinde reported that moving certain XBL-backed nodes from a document into the replacement document created by document.open can cause a JavaScript compartment mismatch which can often lead to exploitable conditions...

Use-after-free in serializeToStream — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free in XMLSerializer by the exposing of serializeToStream to web content. This can lead to arbitrary code execution when exploited...

select element persistence allows for attacks — Mozilla

Security researcher David Bloom of Cue discovered that elements are always-on-top chromeless windows and that navigation away from a page with an active menu does not remove this window.When another menu is opened programmatically on a new page, the original menu can be retained and arbitrary HTM...

DOS and crash with full screen and history navigation — Mozilla

Security researcher Soroush Dalili reported that a combination of invoking full screen mode and navigating backwards in history could, in some circumstances, cause a hang or crash due to a timing dependent use-after-free pointer reference. This crash may be potentially exploitable...

Miscellaneous memory safety hazards (rv:16.0/ rv:10.0.8) — 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...

Page load short-circuit can lead to XSS — Mozilla

Security researchers Jordi Chancel and Eddy Bordi reported that they could short-circuit page loads to show the address of a different site than what is loaded in the window in the addressbar. Security researcher Chris McGowen independently reported the same flaw, and further demonstrated that th...

Miscellaneous memory safety hazards (rv:10.0/ 1.9.2.26) — 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...

Remote code execution with use-after-free in nsTreeSelection — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that a select event handler for XUL tree items could be called after the tree item was deleted. This results in the execution of previously freed memory which an attacker could use to crash a victim's browser and run...

Crashes with evidence of memory corruption (rv:1.9.1/1.9.0.12) — Mozilla

Mozilla developers and community members 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 ...

Security Vulnerabilities fixed in Firefox ESR 102.10 — Mozilla

An attacker could have caused an out of bounds memory access using WebGL APIs, leading to memory corruption and a potentially exploitable crash.This bug only affects Firefox for macOS. Other operating systems are unaffected. A local attacker can trick the Mozilla Maintenance Service into applying...

Security Vulnerabilities fixed in Firefox ESR 78.2 — Mozilla

If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to ...

Security vulnerabilities fixed in Thunderbird 60.6 — Mozilla

A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained using JavaScript and the element is then removed while still in use. This results in a potentially exploitable crash. The type inference system allows the compilation of functions that can cause typ...

Entering fullscreen and persistent pointerlock without user permission — Mozilla

Security researcher sushi Anton Larsson reported that when paired fullscreen and pointerlock requests are done in combination with closing windows, a pointerlock can be created within a fullscreen window without user permission. This pointerlock cannot then be cancelled without terminating the...

Buffer overflows on Libvpx when decoding WebM video — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover two buffer overflow issues in the Libvpx library used for WebM video when decoding a malformed WebM video file. These buffer overflows result in potentially exploitable crashes...

Key pinning is ignored when overridable errors are encountered — Mozilla

Mozilla security engineer David Keeler reported that when an overridable error is encountered, such as those for expired certificates or a host name does not match a certificate, pinning checks can be be skipped. This would allow for a user to override a pinned certificate when they should not be...

Buffer underflow during MP3 playback — Mozilla

Security researcher Atte Kettunen used the Address Sanitizer tool to discover a buffer underflow during audio playback of a badly formatted MP3 audio files. Through memory allocation manipulation it may be possible to incorporate parts of Firefox memory into an MP3 stream accessible to scripts on...

Further uninitialized memory use during GIF rendering — Mozilla

Google security researcher Michal Zalewski reported that when a malformed GIF image is repeatedly rendered within a element, memory may not always be properly initialized. The resulting series of images then uses this uninitialized memory during rendering, allowing data to potentially leak to web...

Script execution in HTML mail replies — Mozilla

Security researcher Fabián Cuchietti discovered that it was possible to bypass the restriction on JavaScript execution in mail by embedding an with a data: URL within a message. If the victim replied or forwarded the mail after receiving it, quoting it "in-line" using Thunderbird's HTML mail...

Use-after-free during Table Editing — Mozilla

Security researcher Nils used the Address Sanitizer tool while fuzzing to discover a use-after-free problem in the table editing user interface of the editor during garbage collection. This leads to a potentially exploitable crash...

Same-origin bypass with web workers and XMLHttpRequest — Mozilla

Mozilla community member Federico Lanusse reported a mechanism where a web worker can violate same-origin policy and bypass cross-origin checks through XMLHttpRequest. This could allow for cross-site scripting XSS attacks by web workers...

Miscellaneous memory safety hazards (rv:22.0 / rv:17.0.7) — 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...

Miscellaneous memory safety hazards (rv:21.0 / rv:17.0.6) — 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...