Roundcube zero-day exploited in attacks on European governments – Week in security with Tony Anscombe

6 months ago AndyC

Video
The zero-day exploit deployed by the Winter Vivern APT group only requires that the target views a specially crafted message in a web browser

Video

The zero-day exploit deployed by the Winter Vivern APT group only requires that the target views a specially crafted message in a web browser

27 Oct 2023

This week, ESET research described how the Winter Vivern APT group has been exploiting a zero-day XSS vulnerability in Roundcube Webmail servers to target European governmental entities and a think tank. ESET researchers uncovered the attacks on October 11^th while monitoring Winter Vivern’s cyberespionage operations, which typically take aim at governments in Europe and Central Asia. They promptly reported the security loophole to the Roundcube team on October 12^th, who released security updates for the vulnerability four days later.

The security flaw (CVE-2023-5631) can be exploited via specially crafted email messages. Organizations are strongly recommended to update their installations of Roundcube Webmail to the latest version post-haste.

Find out more in the video and in our blogpost.

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AndyC

Andy Curtis is an award-winning security consultant, researcher and public speaker. He has been working in the computer security industry since the early 1990s, having been employed by state and federal government, leading healthcare and banking providers across three continents. He has given talks about computer security for some of the world’s largest companies, worked with law enforcement agencies on investigations into hacking groups, and is a regular voice on TV and radio explaining IT security threats.

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