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CVSS: 4.3EPSS: 0%CPEs: 1EXPL: 0

For native-to-JS bridging the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token could leak when used for downloading files. This vulnerability affects Firefox for iOS < 26. Para el puente native-to-JS, la aplicación requiere que sea pasado un token único que garantice que un código que no sea de la aplicación no pueda llamar a las funciones de puente. Ese token podría filtrarse cuando sea usado para descargar archivos. • https://bugzilla.mozilla.org/show_bug.cgi?id=1631739 https://www.mozilla.org/security/advisories/mfsa2020-19 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 9.3EPSS: 0%CPEs: 3EXPL: 1

A VideoStreamEncoder may have been freed in a race condition with VideoBroadcaster::AddOrUpdateSink, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78. Un VideoStreamEncoder puede haberse liberado en una condición de carrera con la función VideoBroadcaster::AddOrUpdateSink, resultando en un uso de la memoria previamente liberada, una corrupción de la memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox versiones anteriores a 78 • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html https://bugzilla.mozilla.org/show_bug.cgi?id=1639734 https://security.gentoo.org/glsa/202007-10 https://www.mozilla.org/security/advisories/mfsa2020-24 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-416: Use After Free •

CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0

When the Windows DLL "webauthn.dll" was missing from the Operating System, and a malicious one was placed in a folder in the user's %PATH%, Firefox may have loaded the DLL, leading to arbitrary code execution. *Note: This issue only affects the Windows operating system; other operating systems are unaffected.* This vulnerability affects Firefox < 78. Cuando la DLL "webauthn.dll" de Windows estaba faltando desde el Sistema Operativo y se colocaba una maliciosa en una carpeta en la %PATH% de usuario, Firefox pudo haber cargado la DLL, conllevando a una ejecución de código arbitrario. *Nota: este problema solo afecta al sistema operativo Windows; otros sistemas operativos no están afectados. * Esta vulnerabilidad afecta a Firefox versiones anteriores a 78 • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html https://bugzilla.mozilla.org/show_bug.cgi?id=1642400 https://www.mozilla.org/security/advisories/mfsa2020-24 • CWE-427: Uncontrolled Search Path Element •

CVSS: 8.8EPSS: 0%CPEs: 3EXPL: 0

In non-standard configurations, a JPEG image created by JavaScript could have caused an internal variable to overflow, resulting in an out of bounds write, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78. En configuraciones no estándar, una imagen JPEG creada por JavaScript podría haber causado un desbordamiento de una variable interna, resultando en una escritura fuera de límites, corrupción de la memoria y un bloqueo explotable potencialmente. Esta vulnerabilidad afecta a Firefox versiones anteriores a 78 • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html https://bugzilla.mozilla.org/show_bug.cgi?id=1450353 https://security.gentoo.org/glsa/202007-10 https://www.mozilla.org/security/advisories/mfsa2020-24 https://access.redhat.com/security/cve/CVE-2020-12422 https://bugzilla.redhat.com/show_bug.cgi?id=1872538 • CWE-190: Integer Overflow or Wraparound CWE-787: Out-of-bounds Write •

CVSS: 4.4EPSS: 0%CPEs: 5EXPL: 0

During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78. Durante la generación de claves RSA, las implementaciones de bignum usaron una variación del Binary Extended Euclidean Algorithm que implicaba un flujo significativamente dependiente de la entrada. • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html https://bugzilla.mozilla.org/show_bug.cgi?id=1631597 https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/ • CWE-203: Observable Discrepancy CWE-327: Use of a Broken or Risky Cryptographic Algorithm •