Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird

Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the Mozilla Security Advisories for Firefox...

DLA-2496-1 firefox-esr - security update

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Mozilla Firefox ESR Security Advisories (MFSA2020-54, MFSA2020-56) - Windows

Mozilla Firefox ESR is prone to multiple vulnerabilities. SPDX-FileCopyrightText: 2020 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:mozilla:firefoxesr";...

DSA-4813-1 firefox-esr - security update

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Mozilla Firefox ESR Security Advisories (MFSA2020-54, MFSA2020-56) - Mac OS X

Mozilla Firefox ESR is prone to multiple vulnerabilities. SPDX-FileCopyrightText: 2020 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE = "cpe:/a:mozilla:firefoxesr";...

CVE-2020-26973

Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR 78.6...

KLA12030 Multiple vulnerabilities in Mozilla Firefox ESR

Multiple vulnerabilities were found in Mozilla Firefox ESR. Malicious users can exploit these vulnerabilities to obtain sensitive information, bypass security restrictions, cause denial of service, execute arbitrary code. Below is a complete list of vulnerabilities: 1. A security bypass...

CVE-2020-26978

Using techniques that built on the slipstream research, a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR 78.6...

CVE-2020-26971

Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR 78.6...

Mozilla Firefox ESR < 78.6

The version of Firefox ESR installed on the remote Windows host is prior to 78.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-55 advisory. - Mozilla developer Christian Holler reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. Some of...

UBUNTU-CVE-2020-26971

Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR 78.6...

UBUNTU-CVE-2020-26973

Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR 78.6...

Mozilla Firefox ESR < 78.6

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 78.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-55 advisory. - Mozilla developer Christian Holler reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5...

CVE-2020-26974

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR...

CVE-2020-35113

Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. 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 84, Thunderbi...

CVE-2020-35111

When an extension with the proxy permission registered to receive , the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. This vulnerability affects Firefox...

UBUNTU-CVE-2020-26974

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox 84, Thunderbird 78.6, and Firefox ESR...

UBUNTU-CVE-2020-35113

Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. 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 84, Thunderbi...

EulerOS 2.0 SP8 : nss-softokn (EulerOS-SA-2020-2523)

According to the versions of the nss-softokn packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This...

Security fix for the ALT Linux 10 package firefox-esr version 78.6.0-alt1

Dec. 14, 2020 Andrey Cherepanov 78.6.0-alt1 - New version 78.6.0. - Fixes: + CVE-2020-16042 Operations on a BigInt could have caused uninitialized memory to be exposed + CVE-2020-26971 Heap buffer overflow in WebGL + CVE-2020-26973 CSS Sanitizer performed incorrect sanitization + CVE-2020-26974...