NSS incorrectly permits skipping of ServerKeyExchange — Mozilla

Security researcher Karthikeyan Bhargavan reported an issue in Network Security Services NSS where the client allows for a ECDHEECDSA exchange where the server does not send its ServerKeyExchange message instead of aborting the handshake. Instead, the NSS client will take the EC key from the ECDS...

Security Vulnerabilities fixed in Firefox ESR 91.6 — Mozilla

A Time-of-Check Time-of-Use bug existed in the Maintenance Updater Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.This bug only affects Firefox on Windows. Other operating systems are unaffected. If a user...

Security Vulnerabilities fixed in Firefox ESR 91.3 — Mozilla

The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have...

Security vulnerabilities fixed in - Thunderbird 68.2 — Mozilla

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early. A subsequent call to XMLGetCurrentLineNumber or XMLGetCurrentColumnNumber then resulted in a heap-based buffer over-read. When following the value's prototype chain, it...

Security vulnerabilities fixed in Firefox 52 — Mozilla

JIT-spray targeting asm.js combined with a heap spray allows for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. A crash triggerable by web content in which an ErrorResult references unassigned memory due to a logic error. The resulting crash may be exploitabl...

Heap overflow in gdk-pixbuf when scaling bitmap images — Mozilla

Security researcher Gustavo Grieco reported a heap overflow in gdk-pixbuf affecting Linux systems using Gnome. This issue is triggered by the scaling of a malformed bitmap format image and results in a potentially exploitable crash...

Security Vulnerabilities fixed in Firefox 124.0.1 — Mozilla

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by fooling range-based bounds check elimination. An attacker was able to inject an event handler into a privileged object that would allow arbitrary JavaScript execution in the parent process. Note: This...

Security Vulnerabilities fixed in Thunderbird 78.2 — Mozilla

If Thunderbird 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...

Memory corruption during failed plugin initialization — Mozilla

Mozilla developer Robert Kaiser Kairo reported that a race condition when initialization of a plugin fails led to a potentially exploitable use-after-free vulnerability...

Exploitable WebGL crash with Cesium JavaScript library — Mozilla

Developer Patrick Cozzi reported a crash in some circumstances when using the Cesium JavaScript library to generate WebGL content. Mozilla developers determined that this crash is potentially exploitable...

Security Vulnerabilities fixed in Firefox ESR 102.8 — Mozilla

The Content-Security-Policy-Report-Only header could allow an attacker to leak a child iframe's unredacted URI when interaction with that iframe triggers a redirect. A background script invoking requestFullscreen and then blocking the main thread could force the browser into fullscreen mode...

Security Vulnerabilities fixed in Thunderbird 68.6 — Mozilla

When removing data about an origin whose tab was recently closed, a use-after-free could occur in the Quota manager, resulting in a potentially exploitable crash. By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during scrip...

defaultValue security checks not applied — Mozilla

Mozilla security researcher mozbugra4 reported a regression where security wrappers are unwrapped without doing a security check in defaultValue. This can allow for improper access to the Location object. In versions 15 and earlier of affected products, there was also the potential for arbitrary...

Gecko memory corruption — Mozilla

Google security researcher Abhishek Arya used the Address Sanitizer tool to uncover four issues: two use-after-free problems, one out of bounds read bug, and a bad cast. The first use-after-free problem is caused when an array of nsSMILTimeValueSpec objects is destroyed but attempts are made to...

Security Vulnerabilities fixed in Firefox ESR 78.12 — Mozilla

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. This bug only affected Firefox when accessibility was enabled. An out of bounds write in ANGLE could have allowed an attacker to corrupt memory leading to a potentially exploitable...

Security Vulnerabilities fixed in Firefox 81 — Mozilla

When processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash. By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original si...

Security vulnerabilities fixed in Firefox 60.6.1 — Mozilla

Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow. Incorrect handling of proto mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write...

Security vulnerabilities fixed in Firefox 49 — Mozilla

A content security policy CSP containing a referrer directive with no values can cause a non-exploitable crash. An out-of-bounds write of a boolean value during text conversion with some unicode characters An out-of-bounds read during the processing of text runs in some pages using...

Delegated OCSP responder certificates failure with id-pkix-ocsp-nocheck extension — Mozilla

Brian Smith reported that delegated Online Certificate Status Protocol OCSP responder certificates fail to recognize the id-pkix-ocsp-nocheck extension. If this extension is present in a delegated OCSP response signing certificate, it will be discarded if it is signed by such a certificate. This...

Privilege escalation using WebIDL-implemented APIs — Mozilla

Security researcher Mariusz Mlynski, via TippingPoint's Pwn2Own contest, reported that it is possible for untrusted web content to load a chrome-privileged page by getting JavaScript-implemented WebIDL to call window.open. A second bug allowed the bypassing of the popup-blocker without user...

SVG buffer overflow and use-after-free issues — Mozilla

Security researcher Arthur Gerkis used the Address Sanitizer tool to find two issues involving Scalable Vector Graphics SVG files. The first issue is a buffer overflow in Gecko's SVG filter code when the sum of two values is too large to be stored as a signed 32-bit integer, causing the function ...

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 78 — Mozilla

When %2F was present in a manifest URL, Firefox's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory. A VideoStreamEncoder may have been freed in a race...

Same-origin policy violation using local HTML file and saved shortcut file — Mozilla

Security researcher Abdulrahman Alqabandi reported that when a local HTML file resides in the same directory as a malicious local shortcut file, the shortcut can be called by the local page to allow the page to read the contents of local files or directories or to load an arbitrary website in...

JPEG information leak — Mozilla

Google security researcher Michal Zalewski reported issues with JPEG format image processing with Start Of Scan SOS and Define Huffman Table DHT markers in the libjpeg library. This could allow for the possible reading of arbitrary memory content as well as cross-domain image theft...

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...

Firefox installer DLL hijacking — Mozilla

Security researcher Robert Kugler reported that when a specifically named DLL file on a Windows computer is placed in the default downloads directory with the Firefox installer, the Firefox installer will load this DLL when it is launched. In circumstances where the installer is run by an...

Miscellaneous memory safety hazards (rv:15.0/ rv:10.0.7) — 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...

Security vulnerabilities fixed in Firefox ESR 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...

Security vulnerabilities fixed in Firefox 64 — Mozilla

A buffer overflow occurs when drawing and validating elements with the ANGLE graphics library, used for WebGL content, when working with the VertexBuffer11 module. This results in a potentially exploitable crash. A buffer overflow and out-of-bounds read can occur in TextureStorage11 within the...

Security vulnerabilities fixed in Firefox 51 — Mozilla

JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. Use-after-free while manipulating XSL in XSLT documents A memory corruption vulnerability in Skia that can occur when using transforms to make gradients, resulting in a potential...

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...

Miscellaneous memory safety hazards (rv:18.0/ rv:10.0.12 / rv:17.0.2) — 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...

Multiple security flaws fixed in FreeType v2.4.9 — Mozilla

Mateusz Jurczyk of the Google Security Team used the Address Sanitizer tool to discover a series of memory safety bugs in the FreeType library, some of which could cause memory corruption and exploitable crashes with certain fonts and font parsing. Firefox Mobile has been upgraded to FreeType...

Security issues addressed in Thunderbird 6 — Mozilla

Many of the issues listed below are not exploitable through mail since JavaScript is disabled by default in Thunderbird. These particular issues may be triggered while viewing RSS feeds and displaying full remote content rather than the feed summary. Addons that expose browser functionality may...

Security Vulnerabilities fixed in Firefox 129 — 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 Thunderbird 68.8.0 — Mozilla

By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. A...

integer overflow in createImageBitmap() — Mozilla

An integer overflow in createImageBitmap was reported through the Pwn2Own contest. The fix for this vulnerability disables the experimental extensions to the createImageBitmap API. This function runs in the content sandbox, requiring a second vulnerability to compromise a user's computer...

Security vulnerabilities fixed in Firefox 50.1 — Mozilla

A buffer overflow in SkiaGl caused when a GrGLBuffer is truncated during allocation. Later writers will overflow the buffer, resulting in a potentially exploitable crash. Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. Event...

resource:// documents can load privileged pages — Mozilla

Security researcher Mariusz Mlynski reported, through HP Zero Day Initiative's Pwn2Own contest, that documents loaded though a resource: URL, such as Mozilla's PDF.js PDF file viewer, were able to subsequently load privileged chrome pages. The privilege restrictions on resource: URLs was handled...

Miscellaneous memory safety hazards (rv:7.0 / rv:1.9.2.23) — 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...

Security Vulnerabilities fixed in Thunderbird 115.1 — Mozilla

Offscreen Canvas did not properly track cross-origin tainting, which could have been used to access image data from another site in violation of same-origin policy. In some circumstances, a stale value could have been used for a global variable in WASM JIT analysis. This resulted in incorrect...

Same-origin-policy violation using Service Workers with plugins — Mozilla

Jason Pang of OneSignal reported that service workers intercept responses to plugin network requests made through the browser. Plugins which make security decisions based on the content of network requests can have these decisions subverted if a service worker forges responses to those requests...

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...

CRMF requests allow for code execution and XSS attacks — Mozilla

Mozilla security researcher mozbugra4 reported a mechanism to execute arbitrary code or a cross-site scripting XSS attack when Certificate Request Message Format CRMF request is generated in certain circumstances...

Use-after-free and buffer overflow issues found using Address Sanitizer — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team discovered a series critically rated of use-after-free, out of bounds read, and buffer overflow issues using the Address Sanitizer tool in shipped software. These issues are potentially exploitable, allowing for remote...

WebGL use-after-free and memory corruption — Mozilla

Security researcher miaubiz used the Address Sanitizer tool to discover two WebGL issues. The first issue is a use-after-free when WebGL shaders are called after being destroyed. The second issue exposes a problem with Mesa drivers on Linux, leading to a potentially exploitable crash...

Child nodes from nsDOMAttribute still accessible after removal of nodes — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that removed child nodes of nsDOMAttribute can be accessed under certain circumstances because of a premature notification of AttributeChildRemoved. This use-after-free of the child nodes could possibly allow for remot...

Security Vulnerabilities fixed in Firefox 124 — Mozilla

An attacker could have leveraged the Windows Error Reporter to run arbitrary code on the system escaping the sandbox. Note: This issue only affected Windows operating systems. Other operating systems are unaffected. Passing invalid data could have led to invalid wasm values being created, such as...

Security Vulnerabilities fixed in Firefox ESR 91.5 — Mozilla

A race condition could have allowed bypassing the fullscreen notification which could have lead to a fullscreen window spoof being unnoticed.This bug only affects Thunderbird for Windows. Other operating systems are unaffected. When navigating from inside an iframe while requesting fullscreen...