<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...

Potential Memory Corruption When Decoding Ogg Vorbis files — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative the possibility of memory corruption during the decoding of Ogg Vorbis files. This can cause a crash during decoding and has the potential for remote code execution...

nsSVGValue out-of-bounds access — Mozilla

Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that a flaw in the Mozilla SVG implementation could result in an out-of-bounds memory access if SVG elements were removed during a DOMAttrModified event handler...

Crashes with evidence of memory corruption (rv:1.9.1.8/ 1.9.0.18) — 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...

Crashes with evidence of memory corruption (rv:1.9.0.9) — 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...

Crashes with evidence of memory corruption (rv:1.8) — Mozilla

As part of the Firefox 1.5 release we fixed several crash bugs to improve the stability of the product. Some of these crashes showed evidence of memory corruption that we presume could be exploited to run arbitrary code and have been applied to the Firefox 1.0.x and Mozilla Suite 1.7.x releases...

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...

File overwrite and privilege escalation through Mozilla Windows updater — Mozilla

Security researcher Frédéric Hoguin reported a mechanism where the Mozilla Windows updater could be used to overwrite arbitrary files. He found that files extracted by the updater from a MAR archive are not locked for writing and can be overwritten by other processes while the updater is running....

Buffer overflow in Brotli decompression — Mozilla

Security researcher Luke Li reported a pointer underflow bug in the Brotli library's decompression that leads to a buffer overflow. This results in a potentially exploitable crash when triggered...

DOS due to malformed frames in HTTP/2 — Mozilla

Security researcher Stuart Larsen reported two issues with HTTP/2 resulting in integer underflows that lead to intentional aborts when the errors are detected...

Use-after-free during DOM interactions with SVG — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover a use-after-free during cycle collection. This was found in interactions with the SVG content through the document object model DOM with animating SVG content. This leads to a...

Trust settings for built-in roots ignored during EV certificate validation — Mozilla

Firefox user Sijie Xia reported that if a user explicitly removes the trust for extended validation EV capable root certificates in the certificate manager, the change is not properly used when validating EV certificates, causing the setting to be ignored. This removes the ability of users to...

Mozilla Updater fails to update some Windows Registry entries — Mozilla

Security researcher Robert Kugler discovered that in some instances the Mozilla Maintenance Service on Windows will be vulnerable to some previously fixed privilege escalation attacks that allowed for local privilege escalation. This was caused by the Mozilla Updater not updating Windows Registry...

Phishing on HTTPS connection through malicious proxy — Mozilla

Google security researcher Michal Zalewski reported an issue where the browser displayed the content of a proxy's 407 response if a user canceled the proxy's authentication prompt. In this circumstance, the addressbar will continue to show the requested site's address, including HTTPS addresses...

Use-after-free in nsImageLoadingContent — Mozilla

Security researcher Nils reported a use-after-free in nsImageLoadingContent when content script is executed. This could allow for arbitrary code execution...

Buffer overflow in Javascript string concatenation — Mozilla

Security researcher pakt reported a flaw via TippingPoint's Zero Day Initiative that an integer overflow is possible when calculating the length for a Javascript string concatenation, which is then used for memory allocation. This results in a buffer overflow, leading to a potentially exploitable...

Out of bounds read in QCMS — Mozilla

Google developer Tony Payne reported an out of bounds OOB read in QCMS, Mozilla’s color management library. With a carefully crafted color profile portions of a user's memory could be incorporated into a transformed image and possibly deciphered...

feed: URLs with an innerURI inherit security context of page — Mozilla

Security researchers Mario Gomes and Soroush Dalili reported that since Mozilla allows the pseudo-protocol feed: to prefix any valid URL, it is possible to construct feed:javascript: URLs that will execute scripts in some contexts. On some sites it may be possible to use this to evade output...

Potential XSS via multibyte content processing errors — Mozilla

Anne van Kesteren of Opera Software found a multi-octet encoding issue where certain octets will destroy the following octets in the processing of some multibyte character sets. This can leave users vulnerable to cross-site scripting XSS attacks on maliciously crafted web pages...

SVG issues found with Address Sanitizer — Mozilla

Security researcher Atte Kettunen from OUSPG found two issues with Firefox's handling of SVG using the Address Sanitizer tool. The first issue, critically rated, is a use-after-free in SVG animation that could potentially lead to arbitrary code execution. The second issue is rated moderate and is...

XMLHttpRequest allows reading HTTPOnly cookies — Mozilla

Developer and Mozilla community member Wladimir Palant reported that cookies marked HTTPOnly were readable by JavaScript via the XMLHttpRequest.getResponseHeader and XMLHttpRequest.getAllResponseHeaders APIs. This vulnerability bypasses the security mechanism provided by the HTTPOnly flag which...

Security Vulnerabilities fixed in Thunderbird 115.14 — Mozilla

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. Incomplete WebAssembly exception handing could have led to a use-after-free. Editor code failed to check an attribute value. This cou...

Security Vulnerabilities fixed in Firefox ESR 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 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...

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...

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...

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...

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...

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...

Certificate verification bypass through the HTTP/2 Alt-Svc header — Mozilla

Security researcher Muneaki Nishimura discovered a flaw in the Mozilla's HTTP Alternative Services implementation. If an Alt-Svc header is specified in the HTTP/2 response, SSL certificate verification can be bypassed for the specified alternate server. As a result of this, warnings of invalid SS...

CORS requests should not follow 30x redirections after preflight — Mozilla

Mozilla developer Christoph Kerschbaumer discovered an issue while investigating Mozilla Foundation Security Advisory 2015-03, previously reported by security researcher Muneaki Nishimura. This flaw was that a cross-origin resource sharing CORS request should not follow 30x redirections after...

Update OpenH264 plugin to version 1.3 — Mozilla

Mozilla and Cisco developers as well as security researcher Nils reported security and stability bugs affecting the OpenH264 plugin version 1.1. This plugin was available to Desktop Firefox 34 and 35 users as an on-demand download as needed. Security researchers Nils and Hanno Böck also reported...

Privileged access to security wrapped protected objects — Mozilla

Mozilla developer Bobby Holley discovered two issues involving security wrappers...

Out-of-bounds read in Web Audio audio timeline — Mozilla

Security researcher Holger Fuhrmannek discovered an out-of-bounds read during the creation of an audio timeline in Web Audio. This results in a crash and could allow for the reading of random memory values...

Use-after-free while when manipulating certificates in the trusted cache — Mozilla

Security researchers Tyson Smith and Jesse Schwartzentruber used the Address Sanitizer tool while fuzzing to discover a use-after-free error resulting in a crash. This is a result of a pair of NSSCertificate structures being added to a trust domain and then one of them is removed while they are...

Firefox for Android addressbar suppression — Mozilla

Security researcher Juho Nurminen reported that on Firefox for Android, when the addressbar has been scrolled off screen, an attacker can prevent it from rendering again through the use of script interacting DOM events. This allows an attacker to present a fake addressbar to the user, possibly...

File: protocol links downloaded to SD card by default — Mozilla

Security researcher Roee Hay reported that a hyperlink using the file: protocol on Firefox for Android could link to a local file in the Firefox profile directory. If a user selected this link on their device, the linked file would be copied to the SD card without prompting. This SD card location...

SVG filters information disclosure through feDisplacementMap — Mozilla

Mozilla developer Robert O'Callahan reported a mechanism for timing attacks involving SVG filters and displacements input to feDisplacementMap. This allows displacements to potentially be correlated with values derived from content. This is similar to the previously reported techniques used for S...

SVG filters can lead to information disclosure — Mozilla

Security researcher Paul Stone of Context Information Security discovered that timing differences in the processing of SVG format images with filters could allow for pixel values to be read. This could potentially allow for text values to be read across domains, leading to information disclosure...

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...

Privacy leak in JavaScript Workers — Mozilla

Mozilla security researcher Frederik Braun discovered that since Firefox 15 the file system location of the active browser profile was available to JavaScript workers. While not dangerous by itself, this could potentially be combined with other vulnerabilities to target the profile in an attack...

Chrome Object Wrapper (COW) bypass through changing prototype — Mozilla

Security researcher Mariusz Mlynski reported that it is possible to change the prototype of an object and bypass Chrome Object Wrappers COW to gain access to chrome privileged functions. This could allow for arbitrary code execution...

Event manipulation in plugin handler to bypass same-origin policy — Mozilla

Mozilla security researcher Jesse Ruderman reported that events in the plugin handler can be manipulated by web content to bypass same-origin policy SOP restrictions. This can allow for clickjacking on malicious web pages...

Location object can be shadowed using Object.defineProperty — Mozilla

Security researcher Mariusz Mlynski reported that it is possible to shadow the location object using Object.defineProperty. This could be used to confuse the current location to plugins, allowing for possible cross-site scripting XSS attacks...

NSS parsing errors with zero length items — Mozilla

Security researcher Kaspar Brand found a flaw in how the Network Security Services NSS ASN.1 decoder handles zero length items. Effects of this issue depend on the field. One known symptom is an unexploitable crash in handling OCSP responses. NSS also mishandles zero-length basic constraints,...

Miscellaneous memory safety hazards (rv:11.0/ rv:10.0.3 / rv:1.9.2.28) — 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...

User tracking across sites using Math.random() — Mozilla

Security researcher Amit Klein reported that it was possible to reverse engineer the value used to seed Math.random. Since the pseudo-random number generator was only seeded once per browsing session, this seed value could be used as a unique token to identify and track users across different web...

Crashes with evidence of memory corruption (rv:1.9.0.11) — 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 102.15 — 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...