Medium severity · published Jul 9, 2020
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…
6.5
CVSS
1.8%
EPSS
No
On KEV
Description
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 This could have caused add-ons to become out-of-date silently without notification to the user.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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 78.0 · source: NVD
FE
Firefox Esr · Mozilla
before 68.10.0 · source: NVD
TH
Thunderbird · Mozilla
before 68.10.0 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12421
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12421
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
Broken Link
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1308251
Third Party Advisory
https://security.gentoo.org/glsa/202007-09
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