Microsoft failed to renew the certificate for one of their very important web pages, causing the site to break and redirect people elsewhere.
seen by The register (opens in new tab)the Windows Insider Software Testing Program certificate expired on Thursday, June 9 in the afternoon.
Those who tried to visit the site during this time were greeted with the usual message “Your connection is not private”, and Chrome, Firefox or Safari users were warned by their browsers. (opens in new tab) not proceed.
Those who did were redirected to the main Windows page with 302 and 307 redirect responses, the post claims, suggesting the company was already aware of the issue at the time.
Since then, the certificate has been renewed and the site is back up and running.
Every now and then, certificates expire and aren’t renewed in time, breaking a few things in the process. In October 2021, one of the largest non-profit Certificate Authority (CA) services experienced high levels of website renewals (opens in new tab) and applications, resulting in some big-name sites experiencing significant outages.
Due to the expiration of the DST Root CA X3 with cross-signature, the issue of Let’s Encrypt, which is run by the Internet Security Research Group, has left websites and apps like Shopify and Slack down. At the time, Let’s Encrypt took to Twitter to advise affected customers to consult the community forum, offering no promise to resolve the issue quickly.
A month later, an expired certificate affected Windows 11 21H2 and prevented Windows users from opening certain apps.
In 2020, an expired signing certificate made Microsoft Teams inaccessible for a while.
While expired certifications are a nuisance, they can be even worse if they affect root certificates and bork services, the publication explains. This was the case with Sectigo’s AddTrust legacy root certificate (opens in new tab) which, when it expired two years ago, affected thousands of customers.