CVE-2020-12421 (GCVE-0-2020-12421)
Vulnerability from cvelistv5 – Published: 2020-07-09 14:39 – Updated: 2024-08-04 11:56
VLAI
EPSS
VEX
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 This could have caused add-ons to become out-of-date silently without notification to the user.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.
Severity
6.5 (Medium)
CWE
- Add-On updates did not respect the same certificate trust rules as software updates
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2… | x_refsource_MISC |
| https://www.mozilla.org/security/advisories/mfsa2… | x_refsource_MISC |
| https://www.mozilla.org/security/advisories/mfsa2… | x_refsource_MISC |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1308251 | x_refsource_MISC |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://usn.ubuntu.com/4421-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.gentoo.org/glsa/202007-09 | vendor-advisoryx_refsource_GENTOO |
| https://security.gentoo.org/glsa/202007-10 | vendor-advisoryx_refsource_GENTOO |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Mozilla | Firefox ESR |
Affected:
unspecified , < 68.10
(custom)
|
guessed | |
| Mozilla | Firefox |
Affected:
unspecified , < 78
(custom)
|
guessed | |
| Mozilla | Thunderbird |
Affected:
unspecified , < 68.10.0
(custom)
|
guessed |
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Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 68.10, Firefox versiones anteriores a 78 y Thunderbird versiones anteriores a 68.10.0\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:P/A:N\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"78.0\",\"matchCriteriaId\":\"09FA5356-4843-47D3-964C-86A6C3859F3C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"68.10.0\",\"matchCriteriaId\":\"EFD35B04-283B-4EF1-9D63-6E023A49DDCA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"68.10.0\",\"matchCriteriaId\":\"A57C62F6-E2C3-4CDD-8518-EF2DB3DCD4DA\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*\",\"matchCriteriaId\":\"7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A31C8344-3E02-4EB8-8BD8-4C84B7959624\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"902B8056-9E37-443B-8905-8AA93E2447FB\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html\",\"source\":\"security@mozilla.org\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://bugzilla.mozilla.org/show_bug.cgi?id=1308251\",\"source\":\"security@mozilla.org\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202007-09\",\"source\":\"security@mozilla.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202007-10\",\"source\":\"security@mozilla.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/4421-1/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-24/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-25/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-26/\",\"source\":\"security@mozilla.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Broken Link\"]},{\"url\":\"https://bugzilla.mozilla.org/show_bug.cgi?id=1308251\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Vendor Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202007-09\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/202007-10\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/4421-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-24/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-25/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.mozilla.org/security/advisories/mfsa2020-26/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T16:55:42+00:00",
"cve": "CVE-2020-12421",
"id": "CVE-2020-12421",
"initial_release_date": "2020-06-30T00:00:00+00:00",
"product_status:fixed": "228",
"product_status:known_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Mozilla: Add-On updates did not respect the same certificate trust rules as software updates",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-12421.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-31T02:24:30Z",
"cve": "CVE-2020-12421",
"id": "CVE-2020-12421",
"initial_release_date": "2023-02-15T03:59:01Z",
"product_status:known_affected": "24",
"product_status:known_not_affected": "24",
"product_status:recommended": "433",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2020-12421",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-12421.json",
"version": "22"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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