CVSS: 4.3EPSS: 0%CPEs: 1EXPL: 0CVE-2021-43533
https://notcve.org/view.php?id=CVE-2021-43533
When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94. Cuando eran analizados los nombres de dominio internacionalizados, a veces se eliminaban los bits altos de los caracteres de las URL, resultando en incoherencias que podían conllevar a una confusión para el usuario o ataques como el phishing. Esta vulnerabilidad afecta a Firefox versiones anteriores a 94 • https://bugzilla.mozilla.org/show_bug.cgi?id=1724233 https://www.mozilla.org/security/advisories/mfsa2021-48 •
CVSS: 8.8EPSS: 0%CPEs: 6EXPL: 0CVE-2021-43534 – Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3
https://notcve.org/view.php?id=CVE-2021-43534
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 estos bugs mostraban evidencias de corrupción de memoria y suponemos que con suficiente esfuerzo algunos de ellos podrían haber sido explotados para ejecutar código arbitrario. • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html 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 https://www.mozilla.org/security/advisories/mfsa2021-50 https:/ • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •
CVSS: 8.8EPSS: 0%CPEs: 6EXPL: 0CVE-2021-43535 – Mozilla: Use-after-free in HTTP2 Session object
https://notcve.org/view.php?id=CVE-2021-43535
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 anteriores a 93, Thunderbird versiones anteriores a 91.3 y Firefox ESR versiones anteriores a 91.3 The Mozilla Foundation Security Advisory describes this flaw as: 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. • https://bugzilla.mozilla.org/show_bug.cgi?id=1667102 https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html https://www.debian.org/security/2021/dsa-5026 https://www.debian.org/security/2022/dsa-5034 https://www.mozilla.org/security/advisories/mfsa2021-43 https://www.mozilla.org/security/advisories/mfsa2021-49 https://www.mozilla.org/security/advisories/mfsa2021-50 https://access.redhat.com/security • CWE-416: Use After Free •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2021-43540
https://notcve.org/view.php?id=CVE-2021-43540
WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95. Las WebExtensions con los permisos correctos podían crear e instalar ServiceWorkers para sitios web de terceros que no habrían desinstalado con la extensión. Esta vulnerabilidad afecta a Firefox versiones anteriores a 95 • https://bugzilla.mozilla.org/show_bug.cgi?id=1636629 https://security.gentoo.org/glsa/202202-03 https://www.mozilla.org/security/advisories/mfsa2021-52 •
CVSS: 6.1EPSS: 0%CPEs: 2EXPL: 0CVE-2021-43544
https://notcve.org/view.php?id=CVE-2021-43544
When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have caused the URL to load unintentionally, which could lead to XSS and spoofing attacks. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95. Cuando se recibía una URL mediante una intención de SEND, Firefox habría buscado el texto, pero los usos posteriores de la barra de direcciones podrían haber causado que la URL se cargara involuntariamente, lo que podría conllevar a ataques de tipo XSS y de suplantación de identidad. • https://bugzilla.mozilla.org/show_bug.cgi?id=1739934 https://www.mozilla.org/security/advisories/mfsa2021-52 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •