
Hackers exploited Zimbra flaw as zero-day using iCalendar files
Researchers monitoring for larger .ICS calendar attachments found that a flaw in Zimbra Collaboration Suite (ZCS) was used in zero-day attacks at the beginning of the year. ICS files, also known as iCalendar files, are used to store calendar and scheduling information (meetings, events, and tasks) in plain text, and to exchange it between various calendar applications. […]