Home/CVE/When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were le
CVE

CVE-2020-12421

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were le

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 This could have caused add-ons to become out-of-date silently without notification to the user.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.

MEDIUM · CVSS 6.5 EPSS 0.0047
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
▤

Affected Products & Versions

4
mozilla firefox< 78.0
mozilla firefox esr< 68.10.0
mozilla thunderbird< 68.10.0
canonical ubuntu linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Jul 2020 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

24
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:10600-1
suse-csafopenSUSE-SU-2024:10601-1
suse-csafopenSUSE-SU-2020:1017-1
suse-csafopenSUSE-SU-2020:0982-1
🔗

References & Sources

11
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlBroken Link
https://bugzilla.mozilla.org/show_bug.cgi?id=1308251Issue TrackingVendor Advisory
https://security.gentoo.org/glsa/202007-09Third Party Advisory
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