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Submission: On October 07 via api from AE — Scanned from DE
Submission: On October 07 via api from AE — Scanned from DE
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Menu Download Firefox Firefox Privacy Notice Get Mozilla VPN * Firefox Browsers Close Firefox Browsers menu * FIREFOX FOR DESKTOP Get the not-for-profit-backed browser on Windows, Mac or Linux. * FIREFOX FOR ANDROID Get the customizable mobile browser for Android smartphones. * FIREFOX FOR IOS Get the mobile browser for your iPhone or iPad. * FIREFOX FOCUS Simply private mobile browsing. * PRIVACY PROMISE Learn how Firefox treats your data with respect. * FIREFOX BLOG Read about new Firefox features and ways to stay safe online. * RELEASE NOTES Get the details on the latest Firefox updates. 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View all Products * Who We Are Close Who We Are menu * MOZILLA MANIFESTO Learn about the values and principles that guide our mission. * MOZILLA FOUNDATION Meet the not-for-profit behind Firefox that stands for a better web. * GET INVOLVED Join the fight for a healthy internet. * LEADERSHIP Meet the team that’s building technology for a better internet. * CAREERS Work for a mission-driven organization that makes people-first products. * MOZILLA BLOG Learn about Mozilla and the issues that matter to us. More About Mozilla * Innovation Close Innovation menu * MOZILLA HUBS Gather in this interactive, online, multi-dimensional social space. * FIREFOX DEVELOPER EDITION Get the Firefox browser built just for developers. * MDN WEB DOCS Check out the home for web developer resources. * FIREFOX REALITY Explore the web with the Firefox browser for virtual reality. * COMMON VOICE Donate your voice so the future of the web can hear everyone. * WEBASSEMBLY Learn more about the new, low-level, assembly-like language. More Mozilla Innovation MENU * Mozilla Security MOZILLA SECURITY * Advisories * Known Vulnerabilities * Mozilla Security Blog * Security Bug Bounty CLIENT BUG BOUNTY * Frequently Asked Questions * Hall of Fame WEB BUG BOUNTY * Eligible Websites * Frequently Asked Questions * Hall of Fame MOZILLA FOUNDATION SECURITY ADVISORY 2021-43 SECURITY VULNERABILITIES FIXED IN FIREFOX 93 Announced October 5, 2021 Impact high Products Firefox Fixed in * Firefox 93 #CVE-2021-38496: USE-AFTER-FREE IN MESSAGETASK Reporter Yangkang of 360 ATA Team Impact high DESCRIPTION During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. REFERENCES * Bug 1725335 #CVE-2021-38497: VALIDATION MESSAGE COULD HAVE BEEN OVERLAID ON ANOTHER ORIGIN Reporter Irvan Kurniawan Impact moderate DESCRIPTION Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. REFERENCES * Bug 1726621 #CVE-2021-38498: USE-AFTER-FREE OF NSLANGUAGEATOMSERVICE OBJECT Reporter Yangkang of 360 ATA Team Impact moderate DESCRIPTION During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. REFERENCES * Bug 1729642 #CVE-2021-32810: DATA RACE IN CROSSBEAM-DEQUE Reporter Maor Kleinberger Impact moderate DESCRIPTION In the crossbeam crate, one or more tasks in the worker queue could have been be popped twice instead of other tasks that are forgotten and never popped. If tasks are allocated on the heap, this could have caused a double free and a memory leak. REFERENCES * Bug 1729813 * Bug https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw #CVE-2021-38500: MEMORY SAFETY BUGS FIXED IN FIREFOX 93, FIREFOX ESR 78.15, AND FIREFOX ESR 91.2 Reporter Mozilla developers Impact high DESCRIPTION Mozilla developers and community members Andreas Pehrson and Christian Holler reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. REFERENCES * Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2 #CVE-2021-38501: MEMORY SAFETY BUGS FIXED IN FIREFOX 93 AND FIREFOX ESR 91.2 Reporter Mozilla developers Impact high DESCRIPTION Mozilla developers and community members Kevin Brosnan, Mihai Alexandru Michis, and Christian Holler reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. REFERENCES * Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2 #CVE-2021-38499: MEMORY SAFETY BUGS FIXED IN FIREFOX 93 Reporter Mozilla developers and community Impact high DESCRIPTION Mozilla developers and community members Julien Cristau, Christian Holler reported memory safety bugs present in Firefox 92. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. REFERENCES * Memory safety bugs fixed in Firefox 93 COMPANY * Mozilla Manifesto * Press Center * Corporate Blog * Careers * Contact * Donate RESOURCES * Privacy Hub * Browser Comparison * Brand Standards SUPPORT * Product Help * File a Bug DEVELOPERS * Developer Edition * Beta * Beta for Android * Nightly * Nightly for Android * Enterprise * Tools FOLLOW @MOZILLA * Twitter (@mozilla) * Instagram (@mozilla) FOLLOW @FIREFOX * Twitter (@firefox) * Instagram (@firefox) * YouTube (@firefoxchannel) Mozilla * Website Privacy Notice * Cookies * Legal * Community Participation Guidelines Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation. Portions of this content are ©1998–2021 by individual mozilla.org contributors. Content available under a Creative Commons license.