1. Ubuntu Security Notices
  2. USN-4566-1

USN-4566-1: Cyrus IMAP Server vulnerabilities

Publication date

5 October 2020

Overview

Cyrus IMAP Server could be made to overwrite files as the administrator.

Releases

Packages

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic 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

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References

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