A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

Security update for MozillaFirefox

mozilla: Cross-origin theft of images with ImageBitmapRenderingContext chromium-browser: Out of bounds read in Skia libpng: use-after-free in png_image_free in png.c Mozilla: Cross-origin theft of images with createImageBitmap Mozilla: Memory safety bugs fixed in Firefox 67 and Firefox ESR 60.7 Mozilla: Type confusion with object groups and UnboxedObjects Mozilla: Stealing of cross-domain images using canvas Mozilla: Compartment mismatch with fetch API Mozilla: Use-after-free of ChromeEventHandler by DocShell Mozilla: Use-after-free in XMLHttpRequest Mozilla: Use-after-free removing listeners in the event listener manager Mozilla: Buffer overflow in WebGL bufferdata on Linux Mozilla: Theft of user history data through drag and drop of hyperlinks to and from bookmarks

Security update for MozillaFirefox

Affected: Ubuntu:16.04:LTS: firefox, Ubuntu:16.04:LTS: thunderbird, Ubuntu:18.04:LTS: firefox, Ubuntu:18.04:LTS: thunderbird, Ubuntu:18.04:LTS: mozjs52, Ubuntu:18.04:LTS: mozjs38, Ubuntu:20.04:LTS: mozjs52

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.