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Ubuntu 18.04 LTS: USN-4566-1 Moderate: Cyrus IMAP Server Issues

ubuntu
Calendar Grey October 6, 2020
Dist Ubuntu Esm H88
Cyrus IMAP Server weaknesses permit admin-level file overwrites. Discover the resolutions and severity specifics.
Cyrus IMAP Server could be made to overwrite files as the administrator.

Summary

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

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory file overwrite Ubuntu administrative access Cyrus IMAP

Update Instructions

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

Ubuntu 18.04 LTS:
  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

https://ubuntu.com/security/notices/USN-4566-1

CVE-2019-11356, CVE-2019-19783

Severity
important
Lowest
Low
Medium
High
Critical

October 05, 2020

Topics%20covered

Topics Covered

security advisory file overwrite Ubuntu administrative access Cyrus IMAP

Package Information

https://launchpad.net/ubuntu/+source/cyrus-imapd/2.5.10-3ubuntu1.1

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