4.3
CVSSv2

CVE-2020-12421

Published: 09/07/2020 Updated: 30/01/2023
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Vulnerability Trend

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mozilla firefox

mozilla thunderbird

mozilla firefox esr

canonical ubuntu linux 18.04

canonical ubuntu linux 19.10

canonical ubuntu linux 20.04

canonical ubuntu linux 16.04

Vendor Advisories

Multiple security issues have been found in Thunderbird which could result in denial of service or potentially the execution of arbitrary code For the oldstable distribution (stretch), these problems have been fixed in version 1:68100-1~deb9u1 For the stable distribution (buster), these problems have been fixed in version 1:68100-1~deb10u1 W ...
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code For the oldstable distribution (stretch), these problems have been fixed in version 68100esr-1~deb9u1 For the stable distribution (buster), these problems have been fixed in version 68100esr-1~deb10u1 ...
Synopsis Important: firefox security update Type/Severity Security Advisory: Important Topic An update for firefox is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) base score, ...
Synopsis Important: firefox security update Type/Severity Security Advisory: Important Topic An update for firefox is now available for Red Hat Enterprise Linux 6Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) base score, ...
Synopsis Important: thunderbird security update Type/Severity Security Advisory: Important Topic An update for thunderbird is now available for Red Hat Enterprise Linux 80 Update Services for SAP SolutionsRed Hat Product Security has rated this update as having a security impact of Important A Common Vul ...
Synopsis Important: firefox security update Type/Severity Security Advisory: Important Topic An update for firefox is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) base score, ...
Synopsis Important: thunderbird security update Type/Severity Security Advisory: Important Topic An update for thunderbird is now available for Red Hat Enterprise Linux 8Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) bas ...
Synopsis Important: firefox security update Type/Severity Security Advisory: Important Topic An update for firefox is now available for Red Hat Enterprise Linux 80 Update Services for SAP SolutionsRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerabili ...
Synopsis Important: firefox security update Type/Severity Security Advisory: Important Topic An update for firefox is now available for Red Hat Enterprise Linux 81 Extended Update SupportRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring ...
Synopsis Important: thunderbird security update Type/Severity Security Advisory: Important Topic An update for thunderbird is now available for Red Hat Enterprise Linux 6Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) bas ...
Synopsis Important: thunderbird security update Type/Severity Security Advisory: Important Topic An update for thunderbird is now available for Red Hat Enterprise Linux 81 Extended Update SupportRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability ...
Synopsis Important: thunderbird security update Type/Severity Security Advisory: Important Topic An update for thunderbird is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (CVSS) bas ...
The Mozilla Foundation Security Advisory describes this flaw as: Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash (CVE-2020-12417) The Mozilla Foundation Security Advisory describes this flaw as: Manipulating individual parts of a ...
Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process memory to malicious JavaScript This vulnerability affects Firefox ESR &lt; 6810, Firefox &lt; 78, and Thunderbird &lt; 68100 (CVE-2020-12418) When processing callbacks that occurred during window flushing in the parent process, the associated ...
Mozilla Foundation Security Advisory 2020-26 Security Vulnerabilities fixed in Thunderbird 68100 Announced June 30, 2020 Impact high Products Thunderbird Fixed in Thunderbird 6810 ...
Mozilla Foundation Security Advisory 2020-29 Security Vulnerabilities fixed in Thunderbird 78 Announced July 16, 2020 Impact high Products Thunderbird Fixed in Thunderbird 78 ...
Mozilla Foundation Security Advisory 2020-25 Security Vulnerabilities fixed in Firefox ESR 6810 Announced June 30, 2020 Impact high Products Firefox ESR Fixed in Firefox ESR 6810 ...
Mozilla Foundation Security Advisory 2020-24 Security Vulnerabilities fixed in Firefox 78 Announced June 30, 2020 Impact high Products Firefox Fixed in Firefox 78 ...