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CVSS: 7.1EPSS: 0%CPEs: 4EXPL: 1

23 Feb 2022 — 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.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. • https://bugzilla.mozilla.org/show_bug.cgi?id=1732435 • CWE-367: Time-of-check Time-of-use (TOCTOU) 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: 3EXPL: 1

14 Feb 2022 — If a user was convinced to drag and drop an image to their desktop or other folder, the resulting object could have been changed into an executable script which would have run arbitrary code after the user clicked on it. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Si se convenciera a un usuario de arrastrar y soltar una imagen en su escritorio u otra carpeta, el objeto resultante podría haberse convertido en un script ejecutable que habría ejecutado código arbitrario... • https://bugzilla.mozilla.org/show_bug.cgi?id=1317873 • CWE-94: Improper Control of Generation of Code ('Code Injection') CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

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

14 Feb 2022 — If a document created a sandboxed iframe without allow-scripts, and subsequently appended an element to the iframe's document that e.g. had a JavaScript event handler - the event handler would have run despite the iframe's sandbox. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Si un documento creó un iframe en la sandboxed sin allow-scripts y posteriormente agregó un elemento al documento del iframe que, por ejemplo, tenía un controlador de ev... • https://bugzilla.mozilla.org/show_bug.cgi?id=1739957 • CWE-693: Protection Mechanism Failure CWE-829: Inclusion of Functionality from Untrusted Control Sphere •

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

14 Feb 2022 — When importing resources using Web Workers, error messages would distinguish the difference between application/javascript responses and non-script responses. This could have been abused to learn information cross-origin. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Al importar recursos utilizando Web Workers, los mensajes de error distinguirían la diferencia entre respuestas application/javascript y respuestas sin script. Se podría haber abu... • https://bugzilla.mozilla.org/show_bug.cgi?id=1740985 • CWE-209: Generation of Error Message Containing Sensitive Information CWE-829: Inclusion of Functionality from Untrusted Control Sphere •

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

14 Feb 2022 — Web-accessible extension pages (pages with a moz-extension:// scheme) were not correctly enforcing the frame-ancestors directive when it was used in the Web Extension's Content Security Policy. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Las páginas de extensión accesibles desde la web (páginas con un esquema moz-extension://) no aplicaban correctamente la directiva frame-ancestors cuando se usaba en la Política de seguridad de contenido de la extensión web. Esta vul... • https://bugzilla.mozilla.org/show_bug.cgi?id=1745566 • CWE-693: Protection Mechanism Failure CWE-829: Inclusion of Functionality from Untrusted Control Sphere •

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

14 Feb 2022 — Mozilla developers Paul Adenot and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 96 and Firefox ESR 91.5. 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 < 97, Thunderbird < 91.6, and Firefox ESR < 91.6. Los desarrolladores de Mozilla, Paul Adenot y Mozilla Fuzzing Team, informaron sobre errores de seguridad de la memoria presentes en Fire... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1742682%2C1744165%2C1746545%2C1748210%2C1748279 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

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: 10.0EPSS: 0%CPEs: 4EXPL: 0

26 Jan 2022 — The constructed curl command from the "Copy as curl" feature in DevTools was not properly escaped for PowerShell. This could have lead to command injection if pasted into a Powershell prompt.<br>*This bug only affects Thunderbird for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. • https://bugzilla.mozilla.org/show_bug.cgi?id=1737252 • CWE-116: Improper Encoding or Escaping of Output •