8.1
CVSSv3

CVE-2020-12387

Published: 26/05/2020 Updated: 14/12/2021
CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6
CVSS v3 Base Score: 8.1 | Impact Score: 5.9 | Exploitability Score: 2.2
VMScore: 605
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Summary

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Vulnerability Trend

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mozilla firefox

mozilla firefox esr

mozilla thunderbird

Vendor Advisories

USN-4353-1 caused a regression in Firefox ...
Firefox could be made to crash or run programs as your login if it opened a malicious website ...
Several security issues were fixed in Thunderbird ...
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code or information disclosure For the oldstable distribution (stretch), these problems have been fixed in version 6880esr-1~deb9u1 For the stable distribution (buster), these problems have been fixed in vers ...
Multiple security issues have been found in Thunderbird which could result in spoofing the displayed sender email address, denial of service or potentially the execution of arbitrary code For the oldstable distribution (stretch), these problems have been fixed in version 1:6880-1~deb9u1 For the stable distribution (buster), these problems have ...
The Mozilla Foundation Security Advisory describes this flaw as:On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in &lt;code&gt;GMPDecodeData&lt;/code&gt; It is possible that with enough effort this could have been exploited to run arbitrary code This vulnerability affects Thunderbird &lt; 68 ...
Synopsis Critical: firefox security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base score, wh ...
Synopsis Critical: firefox security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base score, wh ...
Synopsis Critical: firefox security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability ...
Synopsis Critical: thunderbird security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulner ...
Synopsis Critical: thunderbird security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base s ...
Synopsis Critical: thunderbird security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base s ...
Synopsis Critical: thunderbird security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base s ...
Synopsis Critical: thunderbird security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Sc ...
Synopsis Critical: firefox security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring Sy ...
Synopsis Critical: firefox security update Type/Severity Security Advisory: Critical 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 Critical A Common Vulnerability Scoring System (CVSS) base score, wh ...
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability This resulted in a potentially exploitable crash ...
Mozilla Foundation Security Advisory 2020-18 Security Vulnerabilities fixed in Thunderbird 6880 Announced May 5, 2020 Impact critical Products Thunderbird Fixed in Thunderbird 688 ...
Mozilla Foundation Security Advisory 2020-17 Security Vulnerabilities fixed in Firefox ESR 688 Announced May 5, 2020 Impact critical Products Firefox ESR Fixed in Firefox ESR 688 ...
Mozilla Foundation Security Advisory 2020-16 Security Vulnerabilities fixed in Firefox 76 Announced May 5, 2020 Impact critical Products Firefox Fixed in Firefox 76 ...