Security Vulnerabilities fixed in Firefox ESR 91.12 — Mozilla

When combining CSS properties for overflow and transform, the mouse cursor could interact with different coordinates than displayed. When visiting directory listings for chrome:// URLs as source text, some parameters were reflected...

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 60.4 — 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...

Use-after-free when applying SVG effects — Mozilla

Security researcher Nils used the Address Sanitizer tool to discover a use-after-free vulnerability when applying effects to SVG elements. This results in a potentially exploitable crash...

Spoofing attack through text injection into internal error pages — Mozilla

Security researcher musicDespiteEverything reported that some of the special about: URLs used by Firefox to display system information or error messages can incorporate text passed as parameters. These could be used in spoofing attacks...

Delay following click events in file download dialog too short on OS X — Mozilla

Security researcher Jordi Chancel reported an issue on OS X where the delay between the download dialog getting focus and the button getting enabled was too short. If an attacker is able to induce the user to double-click in a specific location, they can then pass the second click through to the...

Miscellaneous memory safety hazards (rv:41.0 / rv:38.3) — 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...

Windows can retain access to privileged content on navigation to unprivileged pages — Mozilla

Mozilla developer Bobby Holley reported that windows created to hold privileged UI content retained access to privileged internal methods if later navigated to unprivileged content. If a separate flaw was found that allowed for web content to reference these privileged windows, an attacker could...

Use-after-free when using the Fluendo MP3 GStreamer plugin — Mozilla

Security researcher Aki Helin reported a use-after-free when playing certain MP3 format audio files on the web using the Fluendo MP3 plugin for GStreamer on Linux. This is due to a flaw in handling certain MP3 files by the plugin and its interaction with Mozilla code. This can lead to a potential...

Local files or privileged URLs in pages can be opened into new tabs — Mozilla

Security researcher Armin Ebert reported that opening hyperlinks on a page with the mouse and specific keyboard key combinations could allow a Chrome privileged URL to be opened without context restrictions being preserved. This could also allow for local files or resources from a known location ...

XrayWrapper bypass through DOM objects — Mozilla

Mozilla developer Bobby Holley reported that Document Object Model DOM objects with some specific properties can bypass XrayWrappers. This can allow web content to confuse privileged code, potentially enabling privilege escalation...

Script execution in HTML mail replies — Mozilla

Security researcher Fabián Cuchietti discovered that it was possible to bypass the restriction on JavaScript execution in mail by embedding an with a data: URL within a message. If the victim replied or forwarded the mail after receiving it, quoting it "in-line" using Thunderbird's HTML mail...

XSLT stylesheets treated as styles in Content Security Policy — Mozilla

Mozilla security engineer Frederik Braun reported an issue where the implementation of Content Security Policy CSP is not in compliance with the specification. XSLT stylesheets must be subject to script-src directives but Mozilla's implementation of CSP treats them as styles. This could lead to...

Buffer overflow with multi-column, lists, and floats — Mozilla

Security researcher Aki Helin reported that combining lists, floats, and multiple columns could trigger a potentially exploitable buffer overflow...

Buffer overflow in Mozilla Maintenance Service and Mozilla Updater — Mozilla

Security researcher Seb Patane reported stack buffer overflows in both the Maintenance Service and the Mozilla Updater when unexpectedly long paths were encountered. A local attacker could pass these as command-line arguments to the Maintenance Service to crash either program and potentially lead...

Inaccessible updater can lead to local privilege escalation — Mozilla

Security researcher Seb Patane reported an issue with the Mozilla Maintenance Service on Windows. He discovered that when the Mozilla Updater executable was inaccessible, the Maintenance Service will behave incorrectly and can be made to use an updater at an arbitrary location. This updater will...

Sandbox restrictions not applied to nested frame elements — Mozilla

Mozilla community member Bob Owen reported that restrictions are not applied to a frame element contained within a sandboxed iframe. As a result, content hosted within a sandboxed iframe could use a frame element to bypass the restrictions that should be applied...

Use-after-free in HTML Editor — Mozilla

VUPEN Security, via TippingPoint's Zero Day Initiative, reported a use-after-free within the HTML editor when content script is run by the document.execCommand function while internal editor operations are occurring. This could allow for arbitrary code execution...

AutoWrapperChanger fails to keep objects alive during garbage collection — Mozilla

Mozilla developer Olli Pettay discovered that the AutoWrapperChanger class fails to keep some javascript objects alive during garbage collection. This can lead to an exploitable crash allowing for arbitrary code execution...

Use-after-free in serializeToStream — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free in XMLSerializer by the exposing of serializeToStream to web content. This can lead to arbitrary code execution when exploited...

Improper character decoding in HZ-GB-2312 charset — Mozilla

Security researcher Masato Kinugawa found when HZ-GB-2312 charset encoding is used for text, the "" character will destroy another character near the chunk delimiter. This can lead to a cross-site scripting XSS attack in pages encoded in HZ-GB-2312...

evalInSanbox location context incorrectly applied — Mozilla

Mozilla security researcher mozbugra4 reported that if code executed by the evalInSandbox function sets location.href, it can get the wrong subject principal for the URL check, ignoring the sandbox's Javascript context and gaining the context of evalInSandbox object. This can lead to malicious we...

Crash with invalid cast when using instanceof operator — Mozilla

Mozilla community member Ms2ger reported a crash due to an invalid cast when using the instanceof operator on certain types of JavaScript objects. This can lead to a potentially exploitable crash...

Graphite 2 memory corruption — Mozilla

Using the Address Sanitizer tool, Mozilla security researcher Christoph Diehl discovered two memory corruption issues involving the Graphite 2 library used in Mozilla products. Both of these issues can cause a potentially exploitable crash. These problems were fixed in the Graphite 2 library, whi...

Insecure use of __android_log_print — Mozilla

Mozilla developer Blake Kaplan reported that androidlogprint is called insecurely in places. If a malicious web page used a dump statement with a specially crafted string, it can trigger a potentially exploitable crash...

HTTP Redirections and remote content can be read by javascript errors — Mozilla

Security researcher Daniel Divricean reported that a defect in the error handling of javascript errors can leak the file names and location of javascript files on a server, leading to inadvertent information disclosure and a vector for further attacks...

Cross-origin image theft on Mac with integrated Intel GPU — Mozilla

Claus Wahlers reported that random images from GPU memory were showing up in WebGL textures. Once incorporated into the WebGL graphics it is possible for a site to programmatically read the image data and potentially gain sensitive data from other things that had been displayed earlier. This...

Remote code execution using malformed PNG image — Mozilla

OUSPG researcher Aki Helin reported a buffer overflow in Mozilla graphics code which consumes image data processed by libpng. A malformed PNG file could be created which would cause libpng to incorrectly report the size of the image to downstream consumers. When the dimensions of such images are...

Miscellaneous memory safety hazards (rv:1.9.2.7/ 1.9.1.11) — 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...

Crashes with evidence of memory corruption (rv:1.9.1.6/ 1.9.0.16) — 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 ...

NTLM reflection vulnerability — Mozilla

Security researcher Takehiro Takahashi of the IBM X-Force reported that Mozilla's NTLM implementation was vulnerable to reflection attacks in which NTLM credentials from one application could be forwarded to another arbitrary application via the browser. If an attacker could get a user to visit a...

Download filename spoofing with RTL override — Mozilla

Mozilla security researchers Jesse Ruderman and Sid Stamm reported that when downloading a file containing a right-to-left override character RTL in the filename, the name displayed in the dialog title bar conflicts with the name of the file shown in the dialog body. An attacker could use this...

Crashes with evidence of memory corruption (rv:1.8.1.13) — 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 for iOS 147.4 — Mozilla

Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains...

Security Vulnerabilities fixed in Thunderbird 128.1 — 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....

OAuth session fixation vulnerability in Mozilla VPN — Mozilla

An OAuth session fixation vulnerability existed in the VPN login flow, where an attacker could craft a custom login URL, convince a VPN user to login via that URL, and obtain authenticated access as that user. This issue is limited to cases where attacker and victim are sharing the same source IP...

Incorrect icon displayed on permissions notifications — Mozilla

Security researcher Tim McCormack reported that when a page requests a series of permissions in a short timespan, the resulting permission notifications can show the icon for the wrong permission request. This can lead to user confusion and inadvertent consent given when a user is prompted by web...

Information disclosure of disabled plugins through CSS pseudo-classes — Mozilla

Mozilla developer John Schoenick reported that CSS pseudo-classes can be used by web content to leak information on plugins that are installed but disabled. This can be used for information disclosure through a fingerprinting attack that lists all of the plugins installed by a user on a system,...

Disclosure of user actions through JavaScript with motion and orientation sensors — Mozilla

Security researcher Maryam Mehrnezhad of Newcastle University, UK reported an issue discovered by their research team, which also includes Ehsan Toreini, Siamak F. Shahandashti, and Feng Hao. They found vulnerabilities in Firefox for Android using orientation data and motion sensors on a mobile...

Memory leak in libstagefright when deleting an array during MP4 processing — Mozilla

Security researchers Jose Martinez and Romina Santillan reported a memory leak in the libstagefright library when array destruction occurs during MPEG4 video file processing...

Unsafe memory manipulation found through code inspection — Mozilla

Security researcher Ronald Crane reported three vulnerabilities affecting released code that were found through code inspection. These include a high rated memory safety issue in the ANGLE graphics library, a moderate rated potential wild pointer flaw when handling zip files, and a critical rated...

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...

Integer overflow allocating extremely large textures — Mozilla

Security researcher Abhishek Arya Inferno of the Google Chrome Security Team used the Address Sanitizer tool to discover an integer overflow when when allocating textures of extremely larges sizes during graphics operations. This results in a potentially exploitable crash when triggered...

Information disclosure through NTLM authentication — Mozilla

Security researcher Tim Brown reported that Firefox discloses the hostname and possibly the Windows domain through NTLM-based HTTP authentication when sending type 3 messages as part of the authentication exchange. This is because the Workstation field is populated with the hostname of the system...

Trailing whitespace in IP address hostnames can bypass same-origin policy — Mozilla

Security researcher Michał Bentkowski reported that adding white-space characters to hostnames that are IP addresses can bypass same-origin policy. This flaw was caused by trailing whitespaces being evaluated differently when parsing IP addresses instead of alphanumeric hostnames. This could lead...

Mozilla Content Security Policy allows for asterisk wildcards in violation of CSP specification — Mozilla

Mozilla security engineer Christoph Kerschbaumer reported a discrepancy in Mozilla's implementation of Content Security Policy and the CSP specification. The specification states that blob:, data:, and filesystem: URLs should be excluded in case of a wildcard when matching source expressions but...

Use-after-free due to Media Decoder Thread creation during shutdown — Mozilla

Security researchers Tyson Smith and Jesse Schwartzentruber reported a use-after-free during the shutdown process. This was caused by a race condition when media decoder threads are created during the shutdown process in some circumstances. This leads to a potentially exploitable crash when...

Miscellaneous memory safety hazards (rv:36.0 / rv:31.5) — 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...

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...

Apple CoreGraphics framework on OS X 10.10 logging input data to /tmp directory — Mozilla

Security researcher Kent Howard reported an Apple issue present in OS X 10.10 Yosemite where log files are created by the CoreGraphics framework of OS X in the /tmp local directory. These log files contain a record of all inputs into Mozilla programs during their operation. In versions of OS X fr...