Security Vulnerabilities fixed in Thunderbird 68.9.0 — Mozilla

NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. Mozilla developer Iain Ireland...

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...

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...

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...

Use-after-free during processing of DER encoded keys in NSS — Mozilla

Mozilla developer Tim Taubert used the Address Sanitizer tool and software fuzzing to discover a use-after-free vulnerability while processing DER encoded keys in the Network Security Services NSS libraries. The vulnerability overwrites the freed memory with zeroes. This issue has been addressed ...

Integer underflow and buffer overflow processing MP4 metadata in libstagefright — Mozilla

Mozilla developer Gerald Squelart fixed an integer underflow in the libstagefright library initially reported by Joshua Drake to Google. The issues occurred in MP4 format video file while parsing cover metadata, leading to a buffer overflow. This results in a potentially exploitable crash and can...

Linux file chooser crashes on malformed images due to flaws in Jasper library — Mozilla

Security researcher Gustavo Grieco reported that on Linux Gnome systems the dialog for choosing local files uses the operating system's gdk-pixbuf library to render thumbnails for image file types. This library supports various image decoders, and Grieco reported that the Jasper and TGA decoders...

Integer overflows in libstagefright while processing MP4 video metadata — Mozilla

Security researcher Joshua Drake reported potential integer overflows in the libstagefright library while processing video sample metadata in MPEG4 video files. This can lead to a potentially exploitable crash...

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...

Buffer overflow during CSS manipulation — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen from OUSPG discovered a buffer overflow when making capitalization style changes during CSS parsing. This can cause a crash that is potentially exploitable...

Use-after-free setting text directionality — Mozilla

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free during text layout when interacting with the setting of text direction. This results in a use-after-free which can lead to arbitrary code execution...

Potential overflow in JavaScript binary search algorithms — Mozilla

Compiler Engineer Dan Gohman of Google reported that binary search algorithms in the SpiderMonkey JavaScript engine were prone to overflow in several places, leading to potential out-of-bounds array access. While none of these are known to be directly exploitable, they are unsafe in theory and ha...

Character encoding cross-origin XSS attack — Mozilla

Security researcher Masato Kinugawa discovered that if a web page is missing character set encoding information it can inherit character encodings across navigations into another domain from an earlier site. Only same-origin inheritance is allowed according to the HTML5 specification. This issue...

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...

Wrapped WebIDL objects can be wrapped again — Mozilla

Mozilla developer Boris Zbarsky reported that in some circumstances a wrapped WebIDL object can be wrapped multiple times, overwriting the existing wrapped state. This could lead to an exploitable condition in rare cases...

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...

Frames can shadow top.location — Mozilla

Security researcher Mariusz Mlynski reported that the location property can be accessed by binary plugins through top.location with a frame whose name attribute's value is set to "top". This can allow for possible cross-site scripting XSS attacks through plugins...

Use-after-free, buffer overflow, and memory corruption issues found using Address Sanitizer — Mozilla

Security researcher miaubiz used the Address Sanitizer tool to discover a series critically rated of use-after-free, buffer overflow, and memory corruption issues in shipped software. These issues are potentially exploitable, allowing for remote code execution. We would also like to thank miaubiz...

Installer will launch incorrect executable following new installation — Mozilla

Security researcher Masato Kinugawa reported that if a crafted executable is placed in the root partition on a Windows file system, the Firefox and Thunderbird installer will launch this program after a standard installation instead of Firefox or Thunderbird, running this program with the user's...

Key detection without JavaScript via SVG animation — Mozilla

Security researcher Mario Heiderich reported it was possible to use SVG animation accessKey events to detect key strokes even when JavaScript was disabled. Since web pages can normally detect key events through script and most users have scripting enabled this does not present a risk for most...

XSS via plugins and shadowed window.location object — Mozilla

Mozilla developer Boris Zbarsky reported that a frame named "location" could shadow the window.location object unless a script in a page grabbed a reference to the true object before the frame was created. Because some plugins use the value of window.location to determine the page origin this cou...

Security issues addressed in SeaMonkey 2.3 — 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 SeaMonkey 2.2 and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and w...

Miscellaneous memory safety hazards (rv:3.0/1.9.2.18) — 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...

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...

Freed object reuse across plugin instances — Mozilla

Microsoft Vulnerability Research reported that two plugin instances could interact in a way in which one plugin gets a reference to an object owned by a second plugin and continues to hold that reference after the second plugin is unloaded and its object is destroyed. In these cases, the first...

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 ...

jar: scheme ignores the content-disposition: header on the inner URI — Mozilla

Mozilla developer Daniel Veditz reported that when the jar: scheme is used to wrap a URI which serves the content with Content-Disposition: attachment, the HTTP header is ignored and the content is unpacked and displayed inline. A site may depend on this HTTP header to prevent potentially untrust...

UTF-8 URL stack buffer overflow — Mozilla

Justin Schuh and Tom Cross of the IBM X-Force and Peter Williams of IBM Watson Labs reported errors in Mozilla URL parsing routines. These errors could be exploited using a specially crafted UTF-8 URL in a hyperlink which could overflow a stack buffer and allow an attacker to execute arbitrary co...

Security Vulnerabilities fixed in Firefox ESR 102.9 — Mozilla

Sometimes, when invalidating JIT code while following an iterator, the newly generated code could be overwritten incorrectly. This could lead to a potentially exploitable crash. Dragging a URL from a cross-origin iframe that was removed during the drag could have led to user confusion and website...

Security Vulnerabilities fixed in Firefox ESR 91.6 — Mozilla

A Time-of-Check Time-of-Use bug existed in the Maintenance Updater Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.This bug only affects Firefox on Windows. Other operating systems are unaffected. If a user...

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...

Location bar spoofing via data URLs with malformed/invalid mediatypes — Mozilla

Security researcher Firas Salem reported that decoding url-encoded values in data: urls for display leads to potential spoofing in the Location bar by using non-ASCII and emoji characters in a data: url's mediatype. This issue could result in the wrong URL being displayed as a location, which can...

Information disclosure and local file manipulation through drag and drop — Mozilla

Security researcher Rafael Gieschke reported that file URIs dragged from a web page in Firefox to other software do not have their contents properly filtered before being passed to other programs, such as the local file manager. This can allow for the theft or manipulation of arbitrary local file...

Buffer overflow in libstagefright with CENC offsets — Mozilla

Using Address Sanitizer, security researcher Sascha Just reported a buffer overflow in the libstagefright library due to issues with the handling of CENC offsets and the sizes table. This results in a potentially exploitable crash triggerable through web content...

CSP not applied to pages sent with multipart/x-mixed-replace — Mozilla

Security researcher Muneaki Nishimura nishimunea of Recruit Technologies Co., Ltd. reported that Content Security Policy CSP is not applied correctly to web content sent with the multipart/x-mixed-replace MIME type. This allows for script to run in instances where CSP should block it, leading to ...

Same-origin policy violation using performance.getEntries and history navigation with session restore — Mozilla

Security researcher Jordi Chancel discovered a variant of Mozilla Foundation Security Advisory 2015-136 which was fixed in Firefox 43. In the original bug, it was possible to read cross-origin URLs following a redirect if performance.getEntries was used along with an iframe to host a page...

Use-after-free in SetBody — Mozilla

Security researcher lokihardt, working with HP's Zero Day Initiative, reported a use-after-free issue in the SetBody function of HTMLDocument. This results in a potentially exploitable crash...

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...

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...

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...

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...

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...

Use-after-free in Developer Console date with OpenType Sanitiser — Mozilla

Using the Address Sanitizer tool, security researcher Atte Kettunen found a problem with OpenType Sanitiser OTS that resulted in a use-after-free while expanding macros in some circumstances. This use-after-free was only used for information displayed in the developer console and was not...

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...

XBL bindings accessible via improper CSS declarations — Mozilla

Security researcher Cody Crews reported a method to trigger chrome level XML Binding Language XBL bindings through web content. This was possible because some chrome accessible CSS stylesheets had their primary namespace improperly declared. When this occurred, it was possible to use these...

onbeforeunload and Javascript navigation DOS — Mozilla

Security researchers Tim Philipp Schäfers and Sebastian Neef, the team of Internetwache.org, reported a mechanism using JavaScript onbeforeunload events with page navigation to prevent users from closing a malicious page's tab and causing the browser to become unresponsive. This allows for a deni...

Crash when using web workers with asm.js — Mozilla

Soeren Balko reported a crash when terminating a web worker running asm.js code after passing an object between threads. This crash is potentially exploitable...

User-defined properties on DOM proxies get the wrong "this" object — Mozilla

Mozilla developer Boris Zbarsky reported that user-defined getters on DOM proxies would incorrectly get the expando object as this. It is unlikely that this is directly exploitable but could lead to JavaScript client or add-on code making incorrect security sensitive decisions based on hacker...