CVE-2021-29974 Information

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 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1704843 https://www.mozilla.org/security/advisories/mfsa2021-28/ https://security.gentoo.org/glsa/202202-03

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

4.3