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

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. Un fallo en el registro correcto de la ubicación de los punteros vivos a través de las llamadas a instancias de wasm daba lugar a que una GC que ocurría dentro de la llamada no rastreara esos punteros vivos. Esto podría haber conllevado a un uso de memoria previamente liberada causando un bloqueo potencialmente explotable. • https://bugzilla.mozilla.org/show_bug.cgi?id=1739683 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-52 https://www.mozilla.org/security/advisories/mfsa2021-53 • CWE-416: Use After Free •

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

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. Una conversión de tipo incorrecta de los tamaños de enteros de 64 bits a 32 bits permitía a un atacante corromper la memoria, conllevando a un bloqueo potencialmente explotable. 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 Foundation Security Advisory describes this flaw as: An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. • https://bugzilla.mozilla.org/show_bug.cgi?id=1738237 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-52 https://www.mozilla.org/security/advisories/mfsa2021-53 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-704: Incorrect Type Conversion or Cast •

CVSS: 6.5EPSS: 0%CPEs: 6EXPL: 0

Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. El uso de la API de localización en un bucle podría haber causado graves cuelgues y bloqueos de la aplicación. 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 • https://bugzilla.mozilla.org/show_bug.cgi?id=1720926 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-52 https://www.mozilla.org/security/advisories/mfsa2021-53 • CWE-834: Excessive Iteration CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •

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

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. La funcionalidad Opportunistic Encryption de HTTP2 (RFC 8164) permite que una conexión sea actualizada transparentemente a TLS mientras conserva las propiedades visuales de una conexión HTTP, incluyendo el mismo origen con conexiones no cifradas en el puerto 80. • https://bugzilla.mozilla.org/show_bug.cgi?id=1730935 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-48 https://www.mozilla.org/security/advisories/mfsa2021-49 • CWE-346: Origin Validation Error CWE-829: Inclusion of Functionality from Untrusted Control Sphere •

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

When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. Cuando se interactúa con el diálogo del selector de archivos de un elemento de entrada HTML con webkitdirectory configurado, podría haberse producido un uso de memoria previamente liberada, conllevando a una corrupción de memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones anteriores a 94, Thunderbird versiones anteriores a 91.3 y Firefox ESR versiones anteriores a 91.3 The Mozilla Foundation Security Advisory describes this flaw as: When interacting with an HTML input element's file picker dialog with `webkitdirectory` set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. • https://bugzilla.mozilla.org/show_bug.cgi?id=1730156 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://security.gentoo.org/glsa/202202-03 https://security.gentoo.org/glsa/202208-14 https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-48 https://www.mozilla.org/security/advisories/mfsa2021-49 • CWE-416: Use After Free •