USN-4566-1: Cyrus IMAP Server vulnerabilities

Releases

• Ubuntu 18.04 ESM

Packages

• cyrus-imapd - An IMAP server

Details

It was dicovered that Cyrus IMAP Server could execute arbitrary code via a
crafted HTTP PUT operation for an event with a long iCalendar property name.
An attacker could use this vulnerability to cause a crash or possibly execute
arbitrary code. (CVE-2019-11356)

It was discovered that the Cyrus IMAP Server allow users to create any
mailbox with administrative privileges. A local attacker could use this to
obtain sensitive information. (CVE-2019-19783)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04

• cyrus-admin - 2.5.10-3ubuntu1.1
• cyrus-caldav - 2.5.10-3ubuntu1.1
• cyrus-common - 2.5.10-3ubuntu1.1
• cyrus-imapd - 2.5.10-3ubuntu1.1
• cyrus-replication - 2.5.10-3ubuntu1.1

In general, a standard system update will make all the necessary changes.

References

• CVE-2019-11356
• CVE-2019-19783