Security issues addressed in Firefox 6 — Mozilla

Miscellaneous memory safety hazards rv:4.0 Impact: Critical Description: Mozilla identified and fixed several memory safety bugs in the browser engine used in Firefox 4, Firefox 5 and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances...

Recursive eval call causes confirm dialogs to evaluate to true — Mozilla

Security researcher Zach Hoffman reported that a recursive call to eval wrapped in a try/catch statement places the browser into a inconsistent state. Any dialog box opened in this state is displayed without text and with non-functioning buttons. Closing the window causes the dialog to evaluate t...

Incomplete fix for CVE-2010-0179 — Mozilla

Mozilla security researcher mozbugra4 reported that the fix for CVE-2010-0179 could be circumvented permitting the execution of arbitrary JavaScript with chrome privileges...

nsTreeSelection dangling pointer remote code execution vulnerability — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an integer overflow vulnerability in the implementation of the XUL element's selection attribute. When the size of a new selection is sufficiently large the integer used in calculating the length of the selection can...

Insufficient warning for PKCS11 module installation and removal — Mozilla

Mozilla security researcher Jesse Ruderman reported that when security modules were added or removed via pkcs11.addmodule or pkcs11.deletemodule, the resulting dialog was not sufficiently informative. Without sufficient warning, an attacker could entice a victim to install a malicious PKCS11 modu...

JavaScript chrome privilege escalation — Mozilla

Mozilla security researcher mozbugra4 reported a vulnerability which allows scripts from page content to run with elevated privileges. Using this vulnerability, an attacker could cause a chrome privileged object, such as the browser sidebar or the FeedWriter, to interact with web content in such ...

Security Vulnerabilities fixed in Firefox 136 — Mozilla

On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-after-free in the Browser process. This could have led to a sandbox escape. Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could...

Security Vulnerabilities fixed in Firefox for Android 110.1.0 — Mozilla

A potential use-after-free in libaudio was fixed by disabling the AAudio backend when running on Android API below version 30.This bug only affects Firefox for Android. Other versions of Firefox are unaffected...

Security Vulnerabilities fixed in Thunderbird 78.4 — 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. Mozilla developers and community members Jason Kratzer, Simon Giesecke, Philipp, and Christian Holler reported memory safety bugs present in...

Firefox allows for control characters to be set in cookie names — Mozilla

Security researcher musicDespiteEverything previously reported an issue where illegal control characters were stored in as cookie values in violation of RFC6265. While fixing this issue, Mozilla developer Nicholas Hurley realized that the same issue applied to the names of cookies. These characte...

Miscellaneous memory safety hazards (rv:44.0 / rv:38.6) — 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...

Use-after-free during text processing with vertical text enabled — Mozilla

Security researcher Scott Bell used the Address Sanitizer tool to discover a use-after-free error during the processing of text when vertical text is enabled. This leads to a potentially exploitable crash...

Privilege escalation through SVG navigation — Mozilla

Security researcher Mariusz Mlynski reported, through HP Zero Day Initiative's Pwn2Own contest, a method to run arbitrary scripts in a privileged context. This bypassed the same-origin policy protections by using a flaw in the processing of SVG format content navigation...

TLS TURN and STUN connections silently fail to simple TCP connections — Mozilla

Security researcher Alexander Kolesnik reported while the Mozilla platform does not yet support TLS connections to TURN and STUN servers, the WebRTC implementation would accept turns: and stuns: URIs and then attempt plaintext connections to the servers when these were used. This can lead to...

Read of uninitialized memory in Web Audio — Mozilla

Security researcher Holger Fuhrmannek used the used the Address Sanitizer tool to discover a crash in Web Audio while manipulating timelines. This allowed for the a small block of memory with an uninitialized pointer to be read. The crash it not exploitable...

Key pinning bypasses — Mozilla

Mozilla developer Patrick McManus reported a method to use SPDY or HTTP/2 connection coalescing to bypass key pinning on different sites that resolve to the same IP address.This could allow the use of a fraudulent certificate when a saved pin for that subdomain should have prevented the connectio...

Crash in Skia library when scaling high quality images — Mozilla

Mozilla community member John reported a crash in the Skia library when scaling high quality images if the scaling operation takes too long. This is caused by the image data being discarded while still in use by the scaling operation. This crash is potentially exploitable on some systems...

Use-after-free with FireOnStateChange event — Mozilla

Security researcher Jethro Beekman of the University of California, Berkeley reported a crash when the FireOnStateChange event is triggered in some circumstances. This leads to a use-after-free and a potentially exploitable crash when it occurs...

Use-after-free in nsHostResolver — Mozilla

Security researchers Tyson Smith and Jesse Schwartzentruber of the BlackBerry Security Automated Analysis Team used the Address Sanitizer tool while fuzzing to discover a use-after-free during host resolution in some circumstances. This leads to a potentially exploitable crash...

Privilege escalation through Web Notification API — Mozilla

Security researcher Mariusz Mlynski discovered an issue where sites that have been given notification permissions by a user can bypass security checks on source components for the Web Notification API. This allows for script to be run in a privileged context through notifications, leading to...

Firefox default start page UI content invocable by script — Mozilla

Yazan Tommalieh discovered a flaw that once users have viewed the default Firefox start page about:home, subsequent pages they navigate to in that same tab could use script to activate the buttons that were on the about:home page. Most of these simply open Firefox dialogs such as Settings or...

UI selection timeout missing on download prompts — Mozilla

Security researcher Jordi Chancel reported that the dialog for saving downloaded files did not implement a security timeout before button selections were processed. This could be used in concert with spoofing to convince users to select a different option than intended, causing downloaded files t...

Privileged access for content level constructor — Mozilla

Security researcher Cody Crews reported a method to call a content level constructor that allows for this constructor to have chrome privileged access. This affects chrome object wrappers COW and allows for write actions on objects when only read actions should be allowed. This can lead to...

Out-of-bounds read in image rendering — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG found an out-of-bounds read while rendering GIF format images. This could cause a non-exploitable crash and could also attempt to render normally inaccessible data as part of the image...

Memory corruption in XBL with XML bindings containing SVG — Mozilla

Security researcher Sviatoslav Chagaev reported that when using an XBL file containing multiple XML bindings with SVG content, a memory corruption can occur. In concern with remote XUL, this can lead to an exploitable crash...

CSS and HTML injection through Style Inspector — Mozilla

Security researcher Mariusz Mlynski reported that when a maliciously crafted stylesheet is inspected in the Style Inspector, HTML and CSS can run in a chrome privileged context without being properly sanitized first. This can lead to arbitrary code execution...

Miscellaneous memory safety hazards (rv:16.0.1) — Mozilla

Mozilla developers identified and fixed two top crashing bugs in the browser engine used in Firefox and other Mozilla-based products. 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 ru...

Ambiguous IPv6 in Origin headers may bypass webserver access restrictions — Mozilla

Security researcher Simone Fabiano reported that if a cross-site XHR or WebSocket is opened on a web server on a non-standard port for web traffic while using an IPv6 address, the browser will send an ambiguous origin headers if the IPv6 address contains at least 2 consecutive 16-bit fields of...

Miscellaneous memory safety hazards (rv:8.0) — 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...

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...

Add support for OTS font sanitizer — Mozilla

Mozilla added the OTS font sanitizing library to prevent downloadable fonts from exposing vulnerabilities in the underlying OS font code. This library mitigates against several issues independently reported by Red Hat Security Response Team member Marc Schoenefeld and Mozilla security researcher...

Content-Disposition: attachment ignored if Content-Type: multipart also present — Mozilla

Security researcher Ilja van Sprundel of IOActive reported that the Content-Disposition: attachment HTTP header was ignored when Content-Type: multipart was also present. This issue could potentially lead to XSS problems in sites that allow users to upload arbitrary files and specify a Content-Ty...

Crash and remote code execution in block reflow — Mozilla

Security research firm Astabis reported a vulnerability in Firefox 2 submitted through the iSIGHT Partners GVP Program by Greg McManus, Primary GVP Researcher. The reported crash in Mozilla's block reflow code could be used by an attacker to crash the browser and run arbitrary code on the victim'...

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 Firefox 128 — Mozilla

An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. Firefox Android allowed immediate interaction with permission prompts. This could be used for tapjacking. Clipboard code...

Security Vulnerabilities fixed in Firefox ESR 102.4 — Mozilla

A same-origin policy violation could have allowed the theft of cross-origin URL entries, leaking the result of a redirect, via performance.getEntries. Certain types of allocations were missing annotations that, if the Garbage Collector was in a specific state, could have lead to memory corruption...

Security Vulnerabilities fixed in Firefox ESR 68.10 — Mozilla

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash.Note: this issue only affects Firefox on ARM64 platforms. Manipulating individual parts of a URL object could have caused an...

Security Vulnerabilities fixed in Thunderbird 68.10.0 — Mozilla

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash.Note: this issue only affects Firefox on ARM64 platforms. Manipulating individual parts of a URL object could have caused an...

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 ESR 45.5 — Mozilla

A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash. When the Mozilla Updater is run, if the Updater's log file in the working directory points to a hardlink, data can be appended to an arbitrary local file. Thi...

Information disclosure through Resource Timing API during page navigation — Mozilla

Amazon software engineer Catalin Dumitru reported that the URLs of resources loaded after a navigation started such as in an unload event handler were leaked to the following page through the Resource Timing API. This leads to potential information disclosure...

Crash in incremental garbage collection in JavaScript — Mozilla

Security researcher Jukka Jylänki reported a use-after-free in JavaScript caused by how objects and pointers are handled during incremental garbage collection in some circumstances working with object groups. When triggered, this causes a potential exploitable crash but is mitigated by the...

Buffer overflow parsing HTML5 fragments — Mozilla

Security researcher firehack reported a buffer overflow when parsing HTML5 fragments in a foreign context such as under an node. This results in a potentially exploitable crash when inserting an HTML fragment into an existing document...

Miscellaneous memory safety hazards (rv:47.0 / rv:45.2) — Mozilla

Mozilla developers and community members reported 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...

Local file overwriting and potential privilege escalation through CSP reports — Mozilla

Security researcher Nicolas Golubovic reported that a malicious page can overwrite files on the user's machine using Content Security Policy CSP violation reports. The file contents are restricted to the JSON format of the report. In many cases overwriting a local file may simply be destructive,...

Crash when using debugger with SavedStacks in JavaScript — Mozilla

Security researcher Spandan Veggalam reported a crash while using the debugger API with SavedStacks in JavaScript. This crash can only occurs when the debugger is in use but may be potentially exploitable...

Miscellaneous memory safety hazards (rv:40.0 / rv:38.2) — 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...

Out-of-bound read while computing an oscillator rendering range in Web Audio — Mozilla

Security researcher Holger Fuhrmannek used the Address Sanitizer tool to discover an out-of-bound read while computing an oscillator rendering range in Web Audio. This could allow an attacker to infer the contents of four bytes of memory...

Use-after-free in workers while using XMLHttpRequest — Mozilla

Security researcher Looben Yang used the Address Sanitizer tool to discover two related use-after-free vulnerabilities that occur when using XMLHttpRequest in concert with either shared or dedicated workers. These errors occur when the XMLHttpRequest object is attached to a worker but that object...

Out of bounds read in QCMS library — Mozilla

Security researcher Felix Gröbert of Google used the Address Sanitizer tool to discover an out of bounds read in the QCMS color management library while transforming images with certain parameters. This could lead to information disclosure...