Zimbra Collaboration - Unrestricted File Upload

An issue was discovered in Zimbra Collaboration ZCS 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole extraction to /opt/zimbra/jetty/webapps/zimbra/public that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also,...