Vulnerability Details : CVE-2020-12421
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 This could have caused add-ons to become out-of-date silently without notification to the user.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.
Exploit prediction scoring system (EPSS) score for CVE-2020-12421
Probability of exploitation activity in the next 30 days: 0.41%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 70 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-12421
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2020-12421
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The product does not validate, or incorrectly validates, a certificate.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-12421
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
[security-announce] openSUSE-SU-2020:0982-1: important: Security updateBroken Link
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https://security.gentoo.org/glsa/202007-10
Mozilla Firefox: Multiple vulnerabilities (GLSA 202007-10) — Gentoo securityThird Party Advisory
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
[security-announce] openSUSE-SU-2020:0967-1: important: Security updateBroken Link
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
[security-announce] openSUSE-SU-2020:0983-1: important: Security updateBroken Link
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
[security-announce] openSUSE-SU-2020:1017-1: important: Security updateBroken Link
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https://usn.ubuntu.com/4421-1/
USN-4421-1: Thunderbird vulnerabilities | Ubuntu security notices | UbuntuThird Party Advisory
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https://www.mozilla.org/security/advisories/mfsa2020-25/
Security Vulnerabilities fixed in Firefox ESR 68.10 — MozillaVendor Advisory
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https://bugzilla.mozilla.org/show_bug.cgi?id=1308251
1308251 - (CVE-2020-12421) Remove built-in certificate requirement for addon updates (no security updates for corporate or AntiVirus users)Issue Tracking;Vendor Advisory
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https://www.mozilla.org/security/advisories/mfsa2020-26/
Security Vulnerabilities fixed in Thunderbird 68.10.0 — MozillaVendor Advisory
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https://www.mozilla.org/security/advisories/mfsa2020-24/
Security Vulnerabilities fixed in Firefox 78 — MozillaVendor Advisory
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https://security.gentoo.org/glsa/202007-09
Mozilla Thunderbird: Multiple vulnerabilities (GLSA 202007-09) — Gentoo securityThird Party Advisory
Products affected by CVE-2020-12421
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*