UI Tour whitelisted sites in background tab can spoof foreground tabs — Mozilla

Mozilla developer Matthew Noorenberghe reported that whitelisted Mozilla domains could make UITour API calls while the UI Tour pages for Firefox are present in background tabs. If one of these Mozilla domains was compromised and open in another tab, an attacker could then use that tab to engage i...

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...

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...

Same-origin violations in XMLHttpRequest and XPCNativeWrapper.toString — Mozilla

Mozilla security researcher mozbugra4 reported that it is possible to create a document whose URI does not match the document's principal using XMLHttpRequest. This type of mismatch leads to incorrect results in principal-based security checks. An attacker could use this vulnerability to execute...

Security Vulnerabilities fixed in Thunderbird 115.9 — Mozilla

An unchecked return value in TLS handshake code could have caused a potentially exploitable crash. 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 system...

Security Vulnerabilities fixed in Thunderbird 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 Thunderbird 45.7 — 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 Hashed codes of JavaScript objects are shared between pages. This allows for pointer leaks because an object’s address can...

Buffer overflow in libvpx while parsing vp9 format video — Mozilla

Security researcher Khalil Zhani reported that a maliciously crafted vp9 format video could be used to trigger a buffer overflow while parsing the file. This leads to a potentially exploitable crash due to a flaw in the libvpx library...

Privilege escalation through internal workers — Mozilla

Mozilla community member Jonas Jenwald reported broken behavior in Mozilla's PDF.js PDF file viewer which led to the discovery that internal Workers were incorrectly executed with high privilege. If this flaw were combined with a separate vulnerability allowing for same-origin policy violation, i...

Vulnerabilities found through code inspection — Mozilla

Security researcher Ronald Crane reported seven vulnerabilities affecting released code that he found through code inspection. These included three uses of uninitialized memory, one poor validation leading to an exploitable crash, one read of unowned memory in zip files, and two buffer overflows...

Buffer overflow parsing H.264 video with Linux Gstreamer — Mozilla

Security researcher Aki Helin used the Address Sanitizer tool to find a buffer overflow during video playback on Linux systems. This was due to a problem in older versions of the Gstreamer plugin during the parsing of H.264 formatted video. This issue could be used to induce a possibly exploitabl...

Caja Compiler JavaScript sandbox bypass — Mozilla

Mozilla developer Jan de Mooij reported an issue that affects web content that relies on the Caja Compiler for protection, or other similar sandboxing libraries. He found that some JavaScript objects marked as non-extensible within Caja and Secure EcmaScript could be made extensible again,...

Use-after-free with SMIL Animation Controller — Mozilla

Security researcher Nils used the Address Sanitizer to discover a use-after-free problem with the SMIL Animation Controller when interacting with and rendering improperly formed web content. This causes a potentially exploitable crash...

Out-of-bounds write through TypedArrayObject after neutering — Mozilla

Security researcher George Hotz, via TippingPoint's Pwn2Own contest, discovered an issue where values are copied from an array into a second, neutered array. This allows for an out-of-bounds write into memory, causing an exploitable crash leading to arbitrary code execution...

Use-after-free in synthetic mouse movement — 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 user-after-free in the functions for synthetic mouse movement handling. Security researcher Atte Kettunen from OUSPG also...

Use-after-free, buffer overflow, and out of bounds read issues found using Address Sanitizer — Mozilla

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

Miscellaneous memory safety hazards (rv:13.0/ rv:10.0.5) — 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...

Use-after-free vulnerability when viewing XUL document with script disabled — Mozilla

Security researcher Martin Barbella reported that under certain conditions, viewing a XUL document while JavaScript was disabled caused deleted memory to be accessed. This flaw could potentially be used by an attacker to crash a victim's browser and run arbitrary code on their computer...

Fixes for potentially exploitable crashes ported to the legacy branch — Mozilla

Mozilla developers took fixes from previously fixed memory safety bugs in newer Mozilla-based products and ported them to the Mozilla 1.8.1 branch so they can be utilized by Thunderbird 2 and SeaMonkey 1.1...

Crashes with evidence of memory corruption (rv:1.9.1.4/ 1.9.0.15) — 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 78.14 — Mozilla

When delegating navigations to the operating system, Firefox would accept the mk scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. This bug only affects Firefox for Windows. Other operating systems are unaffected. Mozilla developers...

Miscellaneous memory safety hazards (rv:48.0 / rv:45.3) — 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...

Use-after-free in HTML5 string parser — Mozilla

Security researcher ca0nguyen, working with HP's Zero Day Initiative, reported a use-after-free issue in the HTML5 string parser when parsing a particular set of table-related tags in a foreign fragment context such as SVG. This results in a potentially exploitable crash...

Cross-site scripting (XSS) using history navigations — Mozilla

Mozilla security researcher mozbugra4 reported a method to use browser navigations through history to load a website with that page's baseURI property pointing to that of another site instead of the seemingly loaded one. The user will continue to see the incorrect site in the addressbar of the...

Use-after-free with imgRequestProxy and image processing — Mozilla

Security researcher Arthur Gerkis, via TippingPoint's Zero Day Initiative, reported a use-after-free during image processing from sites with specific content types in concert with the imgRequestProxy function. This causes a potentially exploitable crash...

Miscellaneous memory safety hazards (rv:24.0 / rv:17.0.9) — 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...

getUserMedia permission dialog incorrectly displays location — Mozilla

Mozilla engineer Matt Wobensmith discovered that when the getUserMedia permission dialog for an iframe appears in one domain, it will display its origin as that of the top-level document and not the calling framed page. This could lead to users incorrectly giving camera or microphone permissions...

Use-after-free when displaying table with many columns and column groups — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG discovered that the combination of large numbers of columns and column groups in a table could cause the array containing the columns during rendering to overwrite itself. This can lead to a user-after-free causing a...

Use-after-free issues found using Address Sanitizer — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team discovered a series of use-after-free issues using the Address Sanitizer tool. Many of these issues are potentially exploitable, allowing for remote code execution...

Incorrect URL displayed in addressbar through drag and drop — Mozilla

Security researcher Mario Gomes andresearch firm Code Audit Labs reported a mechanism to short-circuit page loads through drag and drop to the addressbar by canceling the page load. This causes the address of the previously site entered to be displayed in the addressbar instead of the currently...

Cross-origin data theft using canvas and Windows D2D — Mozilla

Mozilla developer Bas Schouten reported that the introduction of the "Azure" graphics back-end on Windows in Firefox 7 re-introduced the cross-origin data theft issue reported by nasalislarvatus3000 as described in MFSA 2011-29...

Security issues addressed in Firefox 3.6.20 — Mozilla

Miscellaneous memory safety hazards rv:1.9.2.20 Impact: Critical Description: Mozilla developers and community members identified and fixed several memory safety bugs in the browser engine used in Firefox 3.6 and other Mozilla-based products. Some of these bugs showed evidence of memory corruptio...

Security Vulnerabilities fixed in Firefox ESR 140.14 — Mozilla

Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. Internally found bugs present in...

Security Vulnerabilities fixed in Firefox ESR 78.8 — Mozilla

As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage."...

Security vulnerabilities fixed in Thunderbird 60.4 — Mozilla

A buffer overflow and out-of-bounds read can occur in TextureStorage11 within the ANGLE graphics library, used for WebGL content. This results in a potentially exploitable crash. A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select...

Security vulnerabilities fixed in Thunderbird 45.6 — Mozilla

Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. Event handlers on marquee elements were executed despite a strict Content Security Policy CSP that disallowed inline JavaScript. Memory corruption resulting in a potentially...

Buffer overflow rendering SVG with bidirectional content — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen found a buffer overflow during the rendering of SVG format graphics with directional content. This is caused by a flaw in directional-isolate processing and results in a potentially exploitable crash...

Network Security Services (NSS) vulnerabilities — Mozilla

Mozilla has updated the version of Network Security Services NSS library used in Firefox to NSS 3.23. This addresses four moderate rated networking security issues reported by Mozilla engineers Tyson Smith and Jed Davis...

Buffer overflow during ASN.1 decoding in NSS — Mozilla

Security researcher Francis Gabriel of Quarkslab reported a heap-based buffer overflow in the way the Network Security Services NSS libraries parsed certain ASN.1 structures. An attacker could create a specially-crafted certificate which, when parsed by NSS, would cause it to crash or execute...

Memory leak in mozTCPSocket to servers — Mozilla

Security researcher David Chan reported that Mozilla's mozTCPSocket implementation could leak data past the end of an array, allowing for the potential exposure of memory or private data to malicious servers...

Out-of-bounds write with WebM video — Mozilla

Using the Address Sanitizer tool, security researcher Abhishek Arya Inferno of the Google Chrome Security Team found an out-of-bounds write when buffering WebM format video containing frames with invalid tile sizes. This can lead to a potentially exploitable crash during WebM video playback...

Uninitialized memory use during GIF rendering — Mozilla

Google security researcher Michal Zalewski discovered that when a malformated GIF image is rendered in certain circumstances, memory is not properly initialized before use. The resulting image then uses this memory during rendering. This could allow for the a script in web content to access this...

Compartment mismatch with quickstubs returned values — Mozilla

Mozilla developer Boris Zbarsky reported reported a problem where jsval-returning quickstubs fail to wrap their return values, causing a compartment mismatch. This mismatch can cause garbage collection to occur incorrectly and lead to a potentially exploitable crash...

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...

Invalid frees causes heap corruption in gfxImageSurface — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG found a heap corruption in gfxImageSurface which allows for invalid frees and possible remote code execution. This happens due to float error, resulting from graphics values being passed through different number system...

Potential site identity spoofing when loading RSS and Atom feeds — Mozilla

Security researcher Jeroen van der Gun reported that if RSS or Atom XML invalid content is loaded over HTTPS, the addressbar updates to display the new location of the loaded resource, including SSL indicators, while the main window still displays the previously loaded content. This allows for...

Overly permissive IPv6 literal syntax — Mozilla

For historical reasons Firefox has been generous in its interpretation of web addresses containing square brackets around the host. If this host was not a valid IPv6 literal address, Firefox attempted to interpret the host as a regular domain name. Gregory Fleischer reported that requests made...

Crashes with evidence of memory corruption (rv:1.9.2.2/ 1.9.1.9/ 1.9.0.19) — Mozilla

Mozilla developers 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 of these could be...

Security Vulnerabilities fixed in Firefox ESR 140.13 — Mozilla

We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. Memory safety bugs present in Firefox ESR 140.12 and...

Security Vulnerabilities fixed in Firefox ESR 68.12 — 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 ...