Multiple vulnerabilities in Mozilla Firefox and Firefox ESR

Обновлено: 18/06/2020
Дата обнаружения
Уровень угрозы

Multiple serious vulnerabilities have been found in Mozilla Firefox. Malicious users can exploit these vulnerabilities to bypass security restrictions, execute arbitrary code, elevate privileges, cause denial of service, conduct XSS or obtain sensitive information.

Below is a complete list of vulnerabilities:

  1. Memory safety bugs can be exploited to run arbitrary code;
  2. Improper parsing of HTML5 fragments can be exploited remotely via specially crafted web content to cause denial of service;
  3. Improper deleting of document object model (DOM) can be exploited via specially crafted table elements created within the editor to cause denial of service;
  4. An unknown vulnerability can be exploited remotely via specially crafted <select> element to spoof the contents of the addressbar;
  5. An unknown vulnerability at ANGLE graphics library can be exploited remotely to cause denial of service (Windows);
  6. An unknown vulnerability can be exploited remotely via specially crafted URI data to bypass of some same-origin policy protections;
  7. No locked for writing files at the Mozilla updater can be exploited locally via a specially crafted application to escalate privileges (Windows);
  8. Improper processing of permission requests can be exploited remotely via specially crafted web page to get permissions, such as for geolocation or microphone access;
  9. An unknown vulnerability can be exploited via specially crafted requests to spoofing, clickjacking and to cause denial of service;
  10. An unknown vulnerability can be exploited via a fingerprinting attack to information disclosure;
  11. Improper mediating of network requests without checking against Content Security Policy (CSP) at Java plugin can be exploited remotely via a specially crafted web site to conduct XSS attack.

Technical details

Vulnerability (2) caused by improper parsing of HTML5 fragments in a foreign context such as under an <svg> node.

Vulnerability (5) caused by improper size checking while writing to an array during some WebGL shader operations.

Vulnerability (6) can be exploited to set location.host value to an arbitrary string.

Vulnerability (7) related to files extracted by the Mozilla updater from a MAR archive. This files are not locked for writing and can be overwritten by other processes while the updater is running.

To exploit vulnerability (8) malicious user has to conduct series of permissions in a short timespan. As result permission notifications can show the icon for the wrong permission request.

Vulnerability (9) can be exploited when paired fullscreen and pointerlock requests are done in combination with closing windows. As result a pointerlock can be created within a fullscreen window without user permission and cannot then be cancelled without terminating the browser.

Vulnerability (10) caused because CSS pseudo-classes can be used by web content to leak information on plugins that are installed but disabled. It can be exploited to disclosure all of the installed plugins.

Пораженные продукты

Mozilla Firefox versions earlier than 47
Mozilla Firefox ESR versions earlier than 45.2


Update to the latest version
Get Firefox ESR
Get Firefox

Первичный источник обнаружения
Mozilla Foundation Security Advisory 2016-50
Mozilla Foundation Security Advisory 2016-49
Mozilla Foundation Security Advisory 2016-55
Mozilla Foundation Security Advisory 2016-57
Mozilla Foundation Security Advisory 2016-56
Mozilla Foundation Security Advisory 2016-59
Mozilla Foundation Security Advisory 2016-58
Mozilla Foundation Security Advisory 2016-54
Mozilla Foundation Security Advisory 2016-60
Mozilla Foundation Security Advisory 2016-61
Mozilla Foundation Security Advisory 2016-53
Mozilla Foundation Security Advisory 2016-52
Mozilla Foundation Security Advisory 2016-51
Оказываемое влияние





Связанные продукты
Mozilla Firefox
Mozilla Firefox ESR

The following public exploits exists for this vulnerability:


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