Archive | Security & Privacy

What is the Dark Tequila Threat?

Hello Zimbra Friends, This blog post is to update you on the Dark Tequila malicious campaign and its possible impact on Zimbra users. Dark Tequila is a complex, malicious campaign targeting Mexican users, with the primary purpose of stealing financial information and login credentials to popular websites (ranging from code versioning repositories to public file […]

Continue Reading 0

#EFAIL: Zimbra Not Affected

There has been active commentary about the “EFAIL” paper released May 14 by a German and Belgian research team that presented potential vulnerability in PGP and S/MIME encrypted emails. The Zimbra Security team has analyzed the paper and tested Zimbra for any exposure to the EFAIL attack patterns. The Results? Good news. Zimbra S/MIME solutions […]

Continue Reading 0

Zimbra Admin Alert … Potential “memcrashd” attack

Zimbra memcached may face the “memcrashd” attack on port 11211. By default, memcached listens on a server IP address that is accessible on the network and via the internet if there is no firewall. If your Zimbra memcache servers are behind a firewall, we recommend blocking access on port 11211 from the Internet to Zimbra […]

Continue Reading 0

Email’s Open Source Renaissance – It’s Time to Expect More

Do you think that email is fading as a communication tool? Think again! Contrary to popular opinion, email is not only still relevant—it’s growing. This whitepaper describes how email providers need to step up and close a yawning innovation gap to meet these demanding consumer expectations: Enterprise-strength privacy and security Cutting-edge functionality All delivered via […]

Continue Reading

ClamAV v0.97 included in ZCS 8.0.6 and below tags all messages as **UNCHECKED**

Hello Everyone. If you are using ZCS 8.0.6 and prior: starting 22 October 2016, anti-virus definitions will no longer update, and your ClamAV instance will stop working entirely. ClamAV EOL source: http://blog.clamav.net/2016/05/clamav-097-engine-end-of-life.html This is a real risk for all outdated ZCS versions, and as a visual symptom, all your messages are being tagged as **UNCHECKED**. […]

Continue Reading