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CA:MaintenanceAndEnforcement: Difference between revisions
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* If the certificate to be distrusted is cross-signed by another certificate in NSS, then the subject/issuer for that certificate chain also has to be distrusted. This is error-prone, even if we ask every CA in Mozilla's program if they have cross-signed with the certificate to be distrusted. | * If the certificate to be distrusted is cross-signed by another certificate in NSS, then the subject/issuer for that certificate chain also has to be distrusted. This is error-prone, even if we ask every CA in Mozilla's program if they have cross-signed with the certificate to be distrusted. | ||
** Possible Scenario: A cross-signing relationship is overlooked, so the malicious certificate continues to be trusted even after the security update. | ** Possible Scenario: A cross-signing relationship is overlooked, so the malicious certificate continues to be trusted even after the security update. | ||
** Possible Solution: Ability to Actively Distrust all certs with a particular Subject. | ** Possible Solution: {{Bug|808839}} - Ability to Actively Distrust all certs with a particular Subject. | ||
* If the certificate to be Actively Distrusted is used by a large portion of the internet population, immediately distrusting the certificate could make many high-traffic websites no longer be reachable, giving the appearance of a large network outage, or users might take actions (such as permanently trusting the bad cert) to bypass error messages. | * If the certificate to be Actively Distrusted is used by a large portion of the internet population, immediately distrusting the certificate could make many high-traffic websites no longer be reachable, giving the appearance of a large network outage, or users might take actions (such as permanently trusting the bad cert) to bypass error messages. | ||
** Possible Scenario: A root certificate that is chained to by many high-traffic websites is compromised and has to be Actively Distrusted. This is done and an update to Firefox pushed out. Then a large number of users can no longer browse to the high-traffic websites, giving the appearance of an outage, costing those high-traffic websites loss in money, causing frustration and confusion to end users who are regular customers of those websites. Many end-users are likely to manually-override the error, permanently trusting the certificate. Then if they later accidentally browse one of the corresponding malicious websites, they will not get an error. | ** Possible Scenario: A root certificate that is chained to by many high-traffic websites is compromised and has to be Actively Distrusted. This is done and an update to Firefox pushed out. Then a large number of users can no longer browse to the high-traffic websites, giving the appearance of an outage, costing those high-traffic websites loss in money, causing frustration and confusion to end users who are regular customers of those websites. Many end-users are likely to manually-override the error, permanently trusting the certificate. Then if they later accidentally browse one of the corresponding malicious websites, they will not get an error. | ||