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CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0

14 Feb 2022 — When a worker is shutdown, it was possible to cause script to run late in the lifecycle, at a point after where it should not be possible. This vulnerability affects Firefox < 96, Thunderbird < 91.6, and Firefox ESR < 91.6. Cuando se apaga un trabajador, era posible hacer que el script se ejecutara tarde en el ciclo de vida, en un punto posterior al que no debería ser posible. Esta vulnerabilidad afecta a Firefox < 96, Thunderbird< 91.6 y Firefox ESR < 91.6. The Mozilla Foundation Security Advisory... • https://bugzilla.mozilla.org/show_bug.cgi?id=1740534 • CWE-94: Improper Control of Generation of Code ('Code Injection') CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0

14 Feb 2022 — If a user installed an extension of a particular type, the extension could have auto-updated itself and while doing so, bypass the prompt which grants the new version the new requested permissions. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Si un usuario instaló una extensión de un tipo particular, la extensión podría haberse actualizado automáticamente y, al hacerlo, omitir el mensaje que otorga a la nueva versión los nuevos permisos solicitados. Esta vulnerabilida... • https://bugzilla.mozilla.org/show_bug.cgi?id=1750565 • CWE-863: Incorrect Authorization CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 10.0EPSS: 0%CPEs: 1EXPL: 0

28 Jan 2022 — Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA or RSA-PSS signatures. A flaw was found in Thunderbird, which is vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable co... • https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0

21 Jan 2022 — When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerab... • https://bugzilla.mozilla.org/show_bug.cgi?id=1732310 •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 1

13 Jan 2022 — Applying a CSS filter effect could have accessed out of bounds memory. This could have lead to a heap-buffer-overflow causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. La aplicación de un efecto de filtro CSS podría haber accedido a la memoria fuera de los límites. Esto podría haber provocado un desbordamiento de búfer de almacenamiento dinámico provocando un fallo potencialmente explotable. • https://bugzilla.mozilla.org/show_bug.cgi?id=1742382 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0

13 Jan 2022 — When inserting text while in edit mode, some characters might have lead to out-of-bounds memory access causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Al insertar texto en el modo de edición, es posible que algunos caracteres hayan provocado un acceso a la memoria fuera de los límites, lo que provocó un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox ESR < 91.5, Firefox < 96 y Thunderbird < 91.5. A... • https://bugzilla.mozilla.org/show_bug.cgi?id=1739923 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-125: Out-of-bounds Read •

CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0

13 Jan 2022 — When navigating from inside an iframe while requesting fullscreen access, an attacker-controlled tab could have made the browser unable to leave fullscreen mode. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Al navegar desde dentro de un iframe mientras se solicita acceso a pantalla completa, una pestaña controlada por un atacante podría haber impedido que el navegador saliera del modo de pantalla completa. Esta vulnerabilidad afecta a Firefox ESR < 91.5, Firefox &l... • https://bugzilla.mozilla.org/show_bug.cgi?id=1739220 • CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 0

13 Jan 2022 — Mozilla developers Calixte Denizet, Kershaw Chang, Christian Holler, Jason Kratzer, Gabriele Svelto, Tyson Smith, Simon Giesecke, and Steve Fink reported memory safety bugs present in Firefox 95 and Firefox ESR 91.4. 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. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Los desarrolladores de Mozilla, Calixte Denizet, Ker... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1664149%2C1737816%2C1739366%2C1740274%2C1740797%2C1741201%2C1741869%2C1743221%2C1743515%2C1745373%2C1746011 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 10.0EPSS: 0%CPEs: 3EXPL: 1

13 Jan 2022 — It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Fue posible construir un marcado XSLT específico que podría omitir un entorno limitado de iframe. Esta vulnerabilidad afecta a Firefox ESR < 91.5, Firefox < 96 y Thunderbird < 91.5. The Mozilla Foundation Security Advisory describes this flaw as: It was possible to construct specific XSLT markups that would enable some... • https://bugzilla.mozilla.org/show_bug.cgi?id=1746720 • CWE-91: XML Injection (aka Blind XPath Injection) CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0

13 Jan 2022 — When resizing a popup while requesting fullscreen access, the popup would have become unable to leave fullscreen mode. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Al cambiar el tamaño de una ventana emergente mientras se solicita acceso a pantalla completa, la ventana emergente no podría salir del modo de pantalla completa. Esta vulnerabilidad afecta a Firefox ESR &lt; 91.5, Firefox &lt; 96 y Thunderbird &lt; 91.5. A flaw was found in Mozilla. • https://bugzilla.mozilla.org/show_bug.cgi?id=1740389 • CWE-1021: Improper Restriction of Rendered UI Layers or Frames •