Mozilla asks CAs to revoke all sub-CA certificates that are used for SSL traffic interception, or face penalties if found out later Mozilla has asked all certificate authorities (CAs) to revoke subordinate CA certificates currently used for corporate SSL traffic management, offering an amnesty to any CAs that had breached Mozilla’s conditions for having their root certificates ship with its products.The request comes after Trustwave recently admitted to issuing a sub-CA certificate to a private company for use in a data loss prevention system.Sub-CA keys can be used to sign SSL certificates for any domain name on the Internet, which makes them very dangerous if they fall in the wrong hands.Even though Trustwave argued that the sub-CA key in question was stored in a hardware security module (HSM), making it irretrievable, the fact that such a powerful certificate was issued to a private company that wasn’t a certificate authority, represents a violation of Mozilla’s policy for CAs. Certificate authorities voluntarily adhere to Mozilla’s CA Certificate Policy in order to have their root keys included by default in Firefox, Thunderbird and other Mozilla products.“Participation in Mozilla’s root program is at our sole discretion, and we will take whatever steps are necessary to keep our users safe, up to and including the removal of root certificates that mis-issue, as well as any roots that cross-sign them,” said Johnathan Nightingale, senior director of Firefox Engineering at Mozilla, in a blog post on Friday. Because there is reason to believe that multiple CAs engage in this type of behavior, Mozilla has decided to offer everyone a one-time chance to come clean about it without risking repercussions instead of making an example out of Trustwave, which would likely discourage similar disclosures.“We believe that security is best served when browsers and CAs can work together; we hope that frank communication and clear expectations can resolve these issues before any such action is required,” Nightingale said.Mozilla made its amnesty offer in an email to all CAs on Friday, asking them to revoke sub-CA certificates used for SSL man-in-the-middle interception or traffic management and to destroy the corresponding HSMs.“We have requested the serial numbers of those certificates and fingerprints of their signing roots so that we, and other relying parties, can detect and distrust these subCA certificates if encountered,” Nightingale said.CAs have until April 27 to comply with these requests. If such certificates are found after that date, the issuing CAs will face punishments including the removal of their root keys from Mozilla’s products.In theory, such forced removals could put those CAs out of business because all the certificates they ever signed would no longer work properly. However, this would only be 100 percent effective if all browser and operating system vendors agree to do it. It remains to be seen how CAs will respond to Mozilla’s requests, especially since they probably have contractual obligations to customers who bought such sub-CA certificates. Experts previously said that two months will not be enough for companies to replace SSL traffic inspection systems that currently use sub-CA certificates with something else. Related content brandpost Sponsored by AWS in collaboration with IBM How digital twin technology is changing complex industrial processes forever As the use cases for digital twins proliferate, it is becoming clear that data-driven enterprises with a track record of innovation stand the best chance of success. By Laura McEwan Dec 05, 2023 4 mins Digital Transformation brandpost Sponsored by AWS in collaboration with IBM Why modernising applications needs to be a ‘must’ for businesses seeking growth Around one-third of enterprises are spending heavily on application modernisation and aiming for cloud native status. The implications for corporate culture, structure and priorities will be profound. By Laura McEwan Dec 05, 2023 5 mins Digital Transformation opinion 11 ways to reduce your IT costs now Reorienting IT’s budget toward future opportunities is a big reason why CIOs should review their IT portfolios with an eye toward curbing unnecessary spending and realizing maximum value from every IT investment. By Stephanie Overby Dec 05, 2023 11 mins Budget Cloud Management IT Governance news analysis SAP faces breakdown in trust over innovation plans The company’s plan to offer future innovations in S/4HANA only to subscribers of its Rise with SAP offering is alienating customers, user conference hears. By Peter Sayer Dec 05, 2023 6 mins SAP Cloud Management Innovation Podcasts Videos Resources Events SUBSCRIBE TO OUR NEWSLETTER From our editors straight to your inbox Get started by entering your email address below. Please enter a valid email address Subscribe