CVSS: 8.8EPSS: 0%CPEs: 3EXPL: 0CVE-2020-26959 – Mozilla: Use-after-free in WebRequestService
https://notcve.org/view.php?id=CVE-2020-26959
During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. Durante el cierre del navegador, la disminución de la referencia podría haber ocurrido en un objeto previamente liberado, 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 83, Firefox ESR versiones anteriores a 78.5, y Thunderbird versiones anteriores a 78.5 • https://bugzilla.mozilla.org/show_bug.cgi?id=1669466 https://www.mozilla.org/security/advisories/mfsa2020-50 https://www.mozilla.org/security/advisories/mfsa2020-51 https://www.mozilla.org/security/advisories/mfsa2020-52 https://access.redhat.com/security/cve/CVE-2020-26959 https://bugzilla.redhat.com/show_bug.cgi?id=1898736 • CWE-416: Use After Free •
CVSS: 9.3EPSS: 0%CPEs: 3EXPL: 0CVE-2020-26968 – Mozilla: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5
https://notcve.org/view.php?id=CVE-2020-26968
Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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 < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. Los desarrolladores de Mozilla reportaron bugs de seguridad de la memoria presentes en Firefox versión 82 y Firefox ESR versión 78.4. Algunos de estos bugs mostraron evidencia de corrupción de la memoria y suponemos que con un esfuerzo suficiente algunos de ellos podrían haber sido explotados para ejecutar código arbitrario. • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1551615%2C1607762%2C1656697%2C1657739%2C1660236%2C1667912%2C1671479%2C1671923 https://www.mozilla.org/security/advisories/mfsa2020-50 https://www.mozilla.org/security/advisories/mfsa2020-51 https://www.mozilla.org/security/advisories/mfsa2020-52 https://access.redhat.com/security/cve/CVE-2020-26968 https://bugzilla.redhat.com/show_bug.cgi?id=1898741 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •
CVSS: 6.1EPSS: 0%CPEs: 3EXPL: 0CVE-2020-26951 – Mozilla: Parsing mismatches could confuse and bypass security sanitizer for chrome privileged code
https://notcve.org/view.php?id=CVE-2020-26951
A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. Un desajuste en el análisis y la carga de eventos en el código SVG de Firefox podría haber permitido a unos eventos de carga dispararse, incluso después del saneamiento. Un atacante ya capaz de explotar una vulnerabilidad de tipo XSS en páginas internas privilegiadas podría haber usado este ataque para omitir nuestro sanitizador incorporado. • https://bugzilla.mozilla.org/show_bug.cgi?id=1667113 https://www.mozilla.org/security/advisories/mfsa2020-50 https://www.mozilla.org/security/advisories/mfsa2020-51 https://www.mozilla.org/security/advisories/mfsa2020-52 https://access.redhat.com/security/cve/CVE-2020-26951 https://bugzilla.redhat.com/show_bug.cgi?id=1898731 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE-354: Improper Validation of Integrity Check Value •
CVSS: 4.3EPSS: 0%CPEs: 2EXPL: 1CVE-2020-16012 – Mozilla: Variable time processing of cross-origin images during drawImage calls
https://notcve.org/view.php?id=CVE-2020-16012
Side-channel information leakage in graphics in Google Chrome prior to 87.0.4280.66 allowed a remote attacker to leak cross-origin data via a crafted HTML page. Un filtrado de información de canal lateral en graphics en Google Chrome versiones anteriores a 87.0.4280.66, permitió a un atacante remoto filtrar datos de origen cruzado por medio de una página HTML diseñada • https://chromereleases.googleblog.com/2020/11/stable-channel-update-for-desktop_17.html https://crbug.com/1088224 https://access.redhat.com/security/cve/CVE-2020-16012 https://bugzilla.redhat.com/show_bug.cgi?id=1898732 • CWE-829: Inclusion of Functionality from Untrusted Control Sphere •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2020-26967
https://notcve.org/view.php?id=CVE-2020-26967
When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83. Cuando se escuchan unos cambios de página con un Mutation Observer, una página web maliciosa podría confundir unas Screenshots de Firefox para interactuar con elementos distintos a los que inyectó en la página. Esto conllevaría a errores internos y un comportamiento inesperado en el código de Screenshots. • https://bugzilla.mozilla.org/show_bug.cgi?id=1665820 https://www.mozilla.org/security/advisories/mfsa2020-50 •