USN-4566-1: Cyrus IMAP Server vulnerabilities
5 October 2020
Cyrus IMAP Server could be made to overwrite files as the administrator.
Releases
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.