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CVE-2021-29974

Severity Medium
Score 4.3/10

Summary

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.

  • LOW
  • NETWORK
  • LOW
  • UNCHANGED
  • REQUIRED
  • NONE
  • NONE
  • NONE

References

Advisory Timeline

  • Published