Cross-origin restriction bypass using Fetch — Mozilla

Security researcher Abdulrahman Alqabandi reported that the fetch API did not correctly implement the Cross-Origin Resource Sharing CORS specification, allowing a malicious page to access private data from other origins. Mozilla developer Ben Kelly independently reported the same issue...

Security Vulnerabilities fixed in Firefox ESR 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...

Security Vulnerability fixed in Firefox 117.0.1, Firefox ESR 115.2.1, Firefox ESR 102.15.1, Thunderbird 102.15.1, and Thunderbird 115.2.2 — Mozilla

Opening a malicious WebP image could lead to a heap buffer overflow in the content process. We are aware of this issue being exploited in other products in the wild. Note: This advisory was previously also tracked as CVE-2023-5129...

Security Vulnerabilities fixed in Thunderbird 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 115.0.2 and Firefox ESR 115.0.2 — Mozilla

During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash...

Security Vulnerabilities fixed in Firefox 118 — Mozilla

A compromised content process could have provided malicious data to FilterNodeD2D1 resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process.This bug only affects Firefox on Windows. Other operating systems are unaffected. A compromised content proces...

Security Vulnerabilities fixed in Thunderbird 102.12 — Mozilla

The error page for sites with invalid TLS certificates was missing the activation-delay Thunderbird uses to protect prompts and permission dialogs from attacks that exploit human response time delays. If a malicious page elicited user clicks in precise locations immediately before navigating to a...

Security Vulnerabilities fixed in Thunderbird 102.13 — Mozilla

An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. A website could have...

Security Vulnerabilities fixed in Firefox 76 — Mozilla

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape.Note: this issue only affects Firef...

Security vulnerabilities fixed in Thunderbird 45.5 — Mozilla

A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash. The Mozilla Updater can be made to choose an arbitrary target working directory for output files resulting from the update process. This vulnerability require...

Stored passwords in 'Saved Logins' can be copied without master password entry — Mozilla

When a master password is set, it is required to be entered again before stored passwords can be accessed in the 'Saved Logins' dialog. It was found that locally stored passwords can be copied to the clipboard thorough the 'copy password' context menu item without re-entering the master password ...

Security vulnerabilities fixed in Firefox 65 — Mozilla

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. A crash and out-of-bounds read can occur when the buffer of a texture...

Security Vulnerabilities fixed in - Firefox ESR 68.3 — Mozilla

When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. When setting a thread name on Windows in WebRTC, an incorrect number of arguments could have been supplied, leading to stack corruption and a potentially exploitabl...

Off-by-one error in OpenType Sanitizer — Mozilla

Mateusz Jurczyk of the Google Security Team discovered an off-by-one error in the OpenType Sanitizer using the Address Sanitizer tool. This can lead to an out-of-bounds read and execution of an uninitialized function pointer during parsing and possible remote code execution...

Security Vulnerabilities fixed in Firefox ESR 102.3 — Mozilla

An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable crash. During iframe navigation, certain pages did not have their FeaturePolicy fully initialized leading to a bypass that leaked device permissions into untrusted subdocuments. Concurrent use of t...

Security vulnerabilities fixed in Firefox 51.0.3 — Mozilla

The cache directory on the local file system is set to be world writable. Firefox defaults to extracting libraries from this cache. This allows for the possibility of an installed malicious application or tools with write access to the file system to replace files used by Firefox with their own...

Security Vulnerabilities fixed in - Firefox 71 — Mozilla

Improper refcounting of soft token session objects could cause a use-after-free and crash likely limited to a denial of service. When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. When setting a thread name on Windo...

Security Vulnerabilities fixed in Thunderbird 78.8.1 — Mozilla

Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task. If the task runs into a failure, the secret key may remain in memory in its unprotected state...

Security vulnerabilities fixed in Firefox 50 — Mozilla

A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash. During URL parsing, a maliciously crafted URL can cause a potentially exploitable crash. When the Mozilla Updater is run, if the Updater's log file in the...

Security Vulnerabilities fixed in Thunderbird 68.11 — Mozilla

By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. WebRTC used the memory address of a class instance as a connection identifier. Unfortunately, this value is...

Security Vulnerabilities fixed in Firefox ESR 78.1 — Mozilla

By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. WebRTC used the memory address of a class instance as a connection identifier. Unfortunately, this value is...

Security Vulnerabilities fixed in Firefox 127 — Mozilla

If a specific sequence of actions is performed when opening a new tab, the triggering principal associated with the new tab may have been incorrect. The triggering principal is used to calculate many values, including the Referer and Sec- headers, meaning there is the potential for incorrect...

Security Vulnerabilities fixed in Thunderbird 78.3 — Mozilla

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 site the one suffering from the open redirect rather than the site the file was actually downloaded from. Thunderbird sometimes ran the...

Buffer overflow in WebGL after out of memory allocation — Mozilla

Security researcher Aki Helin used the Address Sanitizer tool to find a buffer overflow write when rendering some WebGL content. This leads to a potentially exploitable crash...

Security Vulnerabilities fixed in Thunderbird 115.10 — Mozilla

GetBoundName could return the wrong version of an object when JIT optimizations were applied. In some code patterns the JIT incorrectly optimized switch statements and generated code with out-of-bounds-reads. The JIT created incorrect code for arguments in certain cases. This led to potential...

MD5 signatures accepted within TLS 1.2 ServerKeyExchange in server signature — Mozilla

Security researcher Karthikeyan Bhargavan reported an issue in Network Security Services NSS where MD5 signatures in the server signature within the TLS 1.2 ServerKeyExchange message are still accepted. This is an issue since NSS has officially disallowed the accepting MD5 as a hash algorithm in...

Security Vulnerabilities fixed in Firefox 119 — 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. Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header...

Security Vulnerabilities fixed in Firefox ESR 102.7 — Mozilla

An out of date library libusrsctp contained vulnerabilities that could potentially be exploited. Due to the Firefox GTK wrapper code's use of text/plain for drag data and GTK treating all text/plain MIMEs containing file URLs as being dragged a website could arbitrarily read a file via a call to...

Security Vulnerabilities fixed in Firefox 73 — Mozilla

A content process could have modified shared memory relating to crash reporting information, crash itself, and cause an out-of-bound write. This could have caused memory corruption and a potentially exploitable crash. By downloading a file with the .fileloc extension, a semi-privileged extension...

Security Vulnerabilities fixed in Thunderbird 115.8 — Mozilla

When storing and re-accessing data on a networking channel, the length of buffers may have been confused, resulting in an out-of-bounds memory read. Through a series of API calls and redirects, an attacker-controlled alert dialog could have been displayed on another website with the victim...

Security Vulnerabilities fixed in Firefox ESR 68.11 — Mozilla

By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. WebRTC used the memory address of a class instance as a connection identifier. Unfortunately, this value is...

Font vulnerabilities in the Graphite 2 library — Mozilla

Security researcher Holger Fuhrmannek and Mozilla security engineer Tyson Smith reported a number of security vulnerabilities in the Graphite 2 library affecting version 1.3.5...

Security Vulnerabilities fixed in Thunderbird 115.11 — Mozilla

A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. If the browser.privatebrowsing.autostart preference is enabled, IndexedDB files were not properly deleted when the window was closed. This preference is disabled by...

Security Vulnerabilities fixed in Thunderbird 115.7 — Mozilla

An out of bounds write in ANGLE could have allowed an attacker to corrupt memory leading to a potentially exploitable crash. It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an incorrect timestamp used to prevent input after...

Security Vulnerabilities fixed in Firefox ESR 102.12 — Mozilla

The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to protect prompts and permission dialogs from attacks that exploit human response time delays. If a malicious page elicited user clicks in precise locations immediately before navigating to a sit...

Security Vulnerabilities fixed in Thunderbird 91 — Mozilla

A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable crash. Note: This issue only affected Linux operating systems. Other operating systems are unaffected. An issue present in lowering/register allocation could have led to obscure but...

RSA Signature Forgery in NSS — Mozilla

Antoine Delignat-Lavaud, security researcher at Inria Paris in team Prosecco, reported an issue in Network Security Services NSS libraries affecting all versions. He discovered that NSS is vulnerable to a variant of a signature forgery attack previously published by Daniel Bleichenbacher. This is...

Security Vulnerabilities fixed in Firefox ESR 78.6 — Mozilla

When a BigInt was right-shifted the backing store was not properly cleared, allowing uninitialized memory to be read. Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. Certain input to the CSS Sanitizer confused it,...

Security Vulnerabilities fixed in Firefox 82 — Mozilla

A use-after-free bug in the usersctp library was reported upstream. We assume this could have led to memory corruption and a potentially exploitable crash. In the crossbeam rust crate, the bounded channel incorrectly assumed that Vec::fromiter had allocated capacity that was the same as the numbe...

NSS accepts export-length DHE keys with regular DHE cipher suites — Mozilla

Security researcher Matthew Green reported a Diffie–Hellman DHE key processing issue in Network Security Services NSS where a man-in-the-middle MITM attacker can force a server to downgrade TLS connections to 512-bit export-grade cryptography by modifying client requests to include only...

Security Vulnerabilities fixed in Thunderbird 68.4.1 — Mozilla

Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and...

Security Vulnerabilities fixed in Thunderbird 102.14 — 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...

Security Vulnerabilities fixed in Thunderbird 115.0.1 — Mozilla

During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in...

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 Firefox 69.0.1 — Mozilla

When the pointer lock is enabled by a website though requestPointerLock, no user notification is given. This could allow a malicious website to hijack the mouse pointer and confuse users...

libpng integer overflow — Mozilla

An integer overflow in the libpng library can lead to a heap-buffer overflow when decompressing certain PNG images. This leads to a crash, which may be potentially exploitable...

Firefox SVG Animation Remote Code Execution — Mozilla

A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows...

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 68.7 — Mozilla

A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file overwrite in the user's profile directory. One exploitation vector for this would be to supply a user.js file providing arbitrary malicious preference value...

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...