Vulnerability Description
When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 90.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1704843Issue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202202-03Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-28/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1704843Issue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202202-03Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-28/Vendor Advisory
FAQ
What is CVE-2021-29974?
CVE-2021-29974 is a vulnerability with a CVSS score of 4.3 (MEDIUM). When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict...
How severe is CVE-2021-29974?
CVE-2021-29974 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-29974?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.