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CVSS: 7.8EPSS: 0%CPEs: 15EXPL: 0

29 Sep 2017 — File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. Las descargas de archivos codificados con elementos URL "blob:" y "data:" omitían las comprobaciones de... • http://www.securityfocus.com/bid/101059 • CWE-20: Improper Input Validation CWE-494: Download of Code Without Integrity Check •

CVSS: 6.1EPSS: 1%CPEs: 15EXPL: 1

29 Sep 2017 — The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. La directiva CSP (Content Security Policy) "sandbox" no creaba un origen único para el documento, provocando que se comporte como si estuviera siempre es... • http://www.securityfocus.com/bid/101059 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •

CVSS: 9.8EPSS: 15%CPEs: 15EXPL: 0

29 Sep 2017 — A buffer overflow occurs when drawing and validating elements with the ANGLE graphics library, used for WebGL content. This is due to an incorrect value being passed within the library during checks and results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. Ocurre un desbordamiento de búfer cuando se dibujan y validan elementos con la librería de gráficos ANGLE, utilizado para contenidos WebGL. Esto se debe a que se pasa un valor inco... • http://www.securityfocus.com/bid/101053 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •

CVSS: 7.5EPSS: 4%CPEs: 6EXPL: 0

29 Sep 2017 — During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox... • http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html • CWE-416: Use After Free •

CVSS: 9.8EPSS: 9%CPEs: 14EXPL: 1

29 Sep 2017 — A use-after-free vulnerability can occur in design mode when image objects are resized if objects referenced during the resizing have been freed from memory. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. Puede ocurrir una vulnerabilidad de uso de memoria previamente liberada cuando los objetos imagen se redimensionan si los objetos referenciados durante el redimensionamiento se han liberado de la memoria. Esto resulta en... • http://www.securityfocus.com/bid/101055 • CWE-416: Use After Free •

CVSS: 10.0EPSS: 2%CPEs: 17EXPL: 0

29 Sep 2017 — Memory safety bugs were reported in Firefox 55 and Firefox ESR 52.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. Se han informado de errores de seguridad de memoria en Firefox 55 y Firefox ESR 52.3. Algunos de estos errores mostraron evidencias de corrupción de memoria y se cree que, con el esfuerzo necesario, se ... • http://www.securityfocus.com/bid/101054 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-122: Heap-based Buffer Overflow •

CVSS: 9.8EPSS: 3%CPEs: 23EXPL: 0

29 Sep 2017 — A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4. Puede ocurrir una vulnerabilidad de uso de memoria previamente liberada en la API Fetch cuando el trabajador o la ventana asociada se liberan mientras siguen en uso, lo que resulta en un cierre inesperado potencialmente explotable. La vulnerabilidad afe... • http://www.securityfocus.com/bid/101055 • CWE-416: Use After Free •

CVSS: 9.1EPSS: 2%CPEs: 18EXPL: 1

10 Aug 2017 — An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55. Ocurre una lectura fuera de límites al aplicar reglas de estilo a pseudo-elementos, como ::first-line, mediante el uso de datos de estilo en caché. La vulnerabilidad afecta a Thunderbird en versiones anteriores a la 52.3, Firefox ESR en versiones anteriores a la 52.3 y Firefox en versiones anteriores a l... • http://www.securityfocus.com/bid/100315 • CWE-125: Out-of-bounds Read •

CVSS: 9.8EPSS: 9%CPEs: 22EXPL: 1

10 Aug 2017 — A buffer overflow will occur when viewing a certificate in the certificate manager if the certificate has an extremely long object identifier (OID). This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55. Ocurrirá un desbordamiento de búfer al ver un certificado en el gestor de certificados si el certificado tiene un OID (Object Identifier) o identificador de objeto demasiado largo. Esto resulta en un cierre inesperado potencialme... • http://www.securityfocus.com/bid/100206 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read •

CVSS: 9.8EPSS: 11%CPEs: 23EXPL: 1

10 Aug 2017 — A buffer overflow can occur when the image renderer attempts to paint non-displayable SVG elements. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55. Puede ocurrir un desbordamiento de búfer cuando el renderizador de imagen intenta pintar elementos SVG no mostrables. Esto resulta en un cierre inesperado potencialmente explotable. • http://www.securityfocus.com/bid/100206 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read •