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CVSS: 7.8EPSS: 0%CPEs: 4EXPL: 0

30 Aug 2023 — When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2. Al recibir datos de representación a través de IPC, `mStream` podría haberse destruido al inicializarse, lo que podría haber dado lugar a un uso después de la liberación que provocaría un bloqueo potencial... • https://bugzilla.mozilla.org/show_bug.cgi?id=1846687 • CWE-416: Use After Free •

CVSS: 7.8EPSS: 0%CPEs: 4EXPL: 0

30 Aug 2023 — When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2. Al crear una devolución de llamada a través de IPC para mostrar la ventana Fil... • https://bugzilla.mozilla.org/show_bug.cgi?id=1846689 • CWE-416: Use After Free •

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

30 Aug 2023 — When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2. Al comprobar si el contexto de navegación se había descartado en `HttpBaseChannel`, si el grupo de carga no estaba disponible, se suponía que ya se había descartado, lo q... • https://bugzilla.mozilla.org/show_bug.cgi?id=1842030 • CWE-179: Incorrect Behavior Order: Early Validation CWE-754: Improper Check for Unusual or Exceptional Conditions •

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

30 Aug 2023 — Memory safety bugs present in Firefox 116, Firefox ESR 102.14, Firefox ESR 115.1, Thunderbird 102.14, and Thunderbird 115.1. 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. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2. Errores de seguridad de la memoria presentes en Firefox 116, Firefox ESR 102.14, Firefox ESR 115.... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1843968%2C1845205%2C1846080%2C1846526%2C1847529 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 10.0EPSS: 0%CPEs: 2EXPL: 0

01 Aug 2023 — Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0. 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 < 116, Firefox ESR < 115.1, and Thunderbird < 115.1. Fallos de seguridad de memoria presentes en Firefox 115, Firefox ESR 115.0 y Thunderbird 115.0. Algunos de estos fallos mostraban evidencias de corrupción de memoria y suponemos que... • https://bugzilla.mozilla.org/show_bug.cgi?id=1841682 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 6.8EPSS: 0%CPEs: 2EXPL: 0

01 Aug 2023 — The Firefox updater created a directory writable by non-privileged users. When uninstalling Firefox, any files in that directory would be recursively deleted with the permissions of the uninstalling user account. This could be combined with creation of a junction (a form of symbolic link) to allow arbitrary file deletion controlled by the non-privileged user. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 116, Firefox ESR < 115.1, and... • https://bugzilla.mozilla.org/show_bug.cgi?id=1824420 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •

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

12 Jul 2023 — During the worker lifecycle, a use-after-free condition could have occured, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1. The Mozilla Foundation Security Advisory describes this flaw as: During the worker lifecycle, a use-after-free condition could have occured, which could have led to a potentially exploitable crash. Multiple security issues were discovered in Thunderbird. If a user were tricked into ... • https://bugzilla.mozilla.org/show_bug.cgi?id=1839703 • CWE-416: Use After Free •

CVSS: 7.8EPSS: 0%CPEs: 6EXPL: 0

05 Jul 2023 — A website could have obscured the fullscreen notification by using a URL with a scheme handled by an external program, such as a mailto URL. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13. The Mozilla Foundation Security Advisory describes this flaw as: A website could have obscured the fullscreen notification by using a URL with a scheme handled by an external program, such as a mailto URL. This c... • https://bugzilla.mozilla.org/show_bug.cgi?id=1816287 • CWE-290: Authentication Bypass by Spoofing CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') •

CVSS: 10.0EPSS: 0%CPEs: 6EXPL: 0

05 Jul 2023 — An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13. The Mozilla Foundation Security Advisory describes this flaw as: An attacker could have triggered a use-after-free condition when creating a WebRTC connection over HTTPS. Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, a... • https://bugzilla.mozilla.org/show_bug.cgi?id=1826002 • CWE-416: Use After Free •

CVSS: 10.0EPSS: 0%CPEs: 6EXPL: 0

05 Jul 2023 — Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13. The Mozilla Foundation Security Advisory describes this flaw as: Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. Multiple securi... • https://bugzilla.mozilla.org/show_bug.cgi?id=1834711 • CWE-416: Use After Free •