US and allies say Russian hackers stole emails without social engineering

WASHINGTON, July 23 : The United States and more than a dozen allied nations said on Thursday that Russian hackers stole emails from users of the Zimbra email program without having to fool them into opening an attachment or clicking a link.The trick, which cybersecurity firm Proofpoint described as a "half-click exploit," leveraged a now-patched weakness in Zimbra software that allowed a hacker to compromise it after a user simply opened an email."No social engineering required," Proofpoint said in a blog post outlining the hacking campaign.In a 31-page alert about the hacking, police and intelligence agencies from the U.S., the Netherlands, Canada, Britain, Australia, New Zealand, Denmark, the Czech Republic and other European nations blamed what they said was a Russian government-suppor