6.8
CVSSv2

CVE-2021-23960

Published: 26/02/2021 Updated: 03/03/2021
CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6
CVSS v3 Base Score: 8.8 | Impact Score: 5.9 | Exploitability Score: 2.8
VMScore: 605
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Summary

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Vulnerability Trend

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mozilla firefox

mozilla firefox esr

mozilla thunderbird

Vendor Advisories

Multiple security issues have been found in Thunderbird, which may lead to the execution of arbitrary code, denial of service or an information leak For the stable distribution (buster), these problems have been fixed in version 1:7870-1~deb10u1 We recommend that you upgrade your thunderbird packages For the detailed security status of thunder ...
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 stable distribution (buster), these problems have been fixed in version 7870esr-1~deb10u1 We recommend that you upgrade your firefox-esr packages For the detailed secur ...
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: 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 ...
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: 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 81 Extended Update SupportRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability ...
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 82 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 82 Extended Update SupportRed Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability ...
The Mozilla Foundation Security Advisory describes these flaws as: During the plaintext phase of the STARTTLS connection setup, protocol commands could have been injected and evaluated within the encrypted session (CVE-2020-15685) When a HTTPS page was embedded in a HTTP page, and there was a service worker registered for the former, the service w ...
A security issue was found in Firefox before version 850 Performing garbage collection on re-declared JavaScript variables resulted in a use-after-poison, and a potentially exploitable crash ...
Mozilla Foundation Security Advisory 2021-03 Security Vulnerabilities fixed in Firefox 85 Announced January 26, 2021 Impact high Products Firefox Fixed in Firefox 85 ...
Mozilla Foundation Security Advisory 2021-04 Security Vulnerabilities fixed in Firefox ESR 787 Announced January 26, 2021 Impact high Products Firefox ESR Fixed in Firefox ESR 787 ...
Mozilla Foundation Security Advisory 2021-05 Security Vulnerabilities fixed in Thunderbird 787 Announced January 26, 2021 Impact high Products Thunderbird Fixed in Thunderbird 787 ...