Popular websites and millions of Internet users scrambled to update software and change passwords Wednesday, after a security bug in crucial encryption code was disclosed sooner than researchers had planned.
Facebook Inc. and Yahoo Inc.'s blogging site Tumblr advised users to change their passwords because of the so-called Heartbleed bug. Canada's tax agency shut its filing website as a precaution, weeks before its April 30 filing deadline.
Websites for Airbnb Inc., the Four Seasons hotel chain and Netflix Inc. were vulnerable for a time, said Wayne Jackson, CEO of Sonatype Inc., which manages open-source software. Airbnb and Netflix said they had updated their software. Four Seasons didn't immediately respond to a request for comment.