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

13 Jan 2022 — After accepting an untrusted certificate, handling an empty pkcs7 sequence as part of the certificate data could have lead to a crash. This crash is believed to be unexploitable. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Después de aceptar un certificado que no es de confianza, manejar una secuencia pkcs7 vacía como parte de los datos del certificado podría haber provocado un bloqueo. Se cree que este accidente no es explotable. • https://bugzilla.mozilla.org/show_bug.cgi?id=1735028 • CWE-295: Improper Certificate Validation CWE-476: NULL Pointer Dereference •

CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 1

13 Jan 2022 — Malicious websites could have confused Firefox into showing the wrong origin when asking to launch a program and handling an external URL protocol. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5. Los sitios web maliciosos podrían haber confundido a Firefox al mostrar el origen incorrecto al solicitar iniciar un programa y manejar un protocolo URL externo. Esta vulnerabilidad afecta a Firefox ESR < 91.5, Firefox < 96 y Thunderbird < 91.5. A flaw was found in Mozi... • https://bugzilla.mozilla.org/show_bug.cgi?id=1705211 • 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: 6.5EPSS: 0%CPEs: 4EXPL: 0

08 Dec 2021 — Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record data copied to the clipboard to the cloud, and make it available on other computers in certain scenarios. Applications that wish to prevent copied data from being recorded in Cloud History must use specific clipboard formats; and Firefox before versions 94 and ESR 91.3 did not implement them. This could have caused sensitive data to be recorded to a user's Microsoft account. *This bug only affects Firefo... • https://bugzilla.mozilla.org/show_bug.cgi?id=1730194 • CWE-668: Exposure of Resource to Wrong Sphere •

CVSS: 8.8EPSS: 0%CPEs: 4EXPL: 0

08 Dec 2021 — The executable file warning was not presented when downloading .inetloc files, which, due to a flaw in Mac OS, can run commands on a user's computer.*Note: This issue only affected Mac OS operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. La advertencia de archivo ejecutable no se presentaba cuando se descargaban archivos .inetloc, que, debido a un fallo en Mac OS, pueden ejecutar comandos en el ordenador de un us... • https://bugzilla.mozilla.org/show_bug.cgi?id=1731779 •

CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0

08 Dec 2021 — Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities. This vulnerability affects Thunderbird < 91.4.0. Thunderbird habilitó inesperadamente JavaScript en el área de composición. El contexto de ejecución de JavaScript se limitaba a esta área y no recibía privilegios a nivel de cromo, pero podía ser usado co... • https://bugzilla.mozilla.org/show_bug.cgi?id=1742579 • CWE-269: Improper Privilege Management CWE-281: Improper Preservation of Permissions •

CVSS: 8.8EPSS: 0%CPEs: 6EXPL: 0

08 Dec 2021 — Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. Los desarrolladores y miembros de la comunidad de Mozilla informaron de bugs de seguridad de memoria presentes en Firefox 93 y Firefox ESR 91.2. Algunos de ... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 8.8EPSS: 1%CPEs: 6EXPL: 0

08 Dec 2021 — A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3. Podría haberse producido un uso de memoria previamente liberada cuando un objeto de sesión HTTP2 se liberaba en un hilo diferente, conllevando a una corrupción de memoria y un fallo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones ante... • https://bugzilla.mozilla.org/show_bug.cgi?id=1667102 • CWE-416: Use After Free •

CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 0

08 Dec 2021 — Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. En determinadas circunstancias, las funciones asíncronas podrían haber causado el fallo de una navegación pero exponiendo la URL de destino. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 91.4.0, Firefox ESR versiones anteriores a 91.4.0 y Firefox versiones anteriores a 95 The Mozilla Fo... • https://bugzilla.mozilla.org/show_bug.cgi?id=1730120 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-1021: Improper Restriction of Rendered UI Layers or Frames •