"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
IssueNotification email subject lines do not contain the expected host name, but instead show localhost6.localdomain6 or localhost.localdomain, for example, the subject line contains:
[SAV-LINUX] Notice from Sophos Anti-Virus on localhost6.localdomain6
Root causeThis occurs because the host name (helen in this example) is added to the localhost entry of the loopback device in the /etc/hosts file. For example
127.0.0.1 helen localhost.localdomain localhost localhost4::1 helen localhost6.localdomain6 localhost6
The main reason for this issue is due to the bug described here: https://bugzilla.redhat.com/show_bug.cgi?id=659471
Perform one of the following workarounds.You should however note that all of the following options change the way in which name resolution works in a system-wide fashion. This might have undesired side-effects on other applications. You should therefore test these workarounds thoroughly before implementing them.
# hostname helen.domain.com
127.0.0.1 localhost.localdomain localhost localhost4::1 localhost6.localdomain6 localhost6
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