Vulnerability 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 This could have caused add-ons to become out-of-date silently without notification to the user.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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 78.0 |
| Mozilla | Firefox Esr | < 68.10.0 |
| Mozilla | Thunderbird | < 68.10.0 |
| Canonical | Ubuntu Linux | 16.04 |
Related Weaknesses (CWE)
References
- 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
- https://security.gentoo.org/glsa/202007-10Third Party Advisory
- https://usn.ubuntu.com/4421-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-24/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-25/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-26/Vendor Advisory
- 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
FAQ
What is CVE-2020-12421?
CVE-2020-12421 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...
How severe is CVE-2020-12421?
CVE-2020-12421 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-12421?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Canonical Ubuntu Linux.