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Speculative execution side-channel attack in Mozilla Firefox and Firefox ESR

Обновлено: 03/06/2020
Дата обнаружения
Уровень угрозы

An information disclosure vulnerability was found in modern CPUs. By exploiting this vulnerability malicious users can obtain sensitive information. This vulnerability can be exploited remotely via malicious web page through a timing side-channel attack using JavaScript.

Technical details

Vendor has disabled or reduced the precision of several time sources in Firefox. The precision of has been reduced from 5μs to 20μs, and the SharedArrayBuffer feature has been disabled because it can be used to construct a high-resolution timer.

Пораженные продукты

Mozilla Firefox earlier than 57.0.4
Mozilla Firefox ESR earlier than 52.6


Update to latest version
Download Mozilla Firefox ESR
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Первичный источник обнаружения
Mozilla Foundation Security Advisory 2018-01
Связанные продукты
Mozilla Firefox
Mozilla Firefox ESR
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