- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 202006-23
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                           https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: Normal
    Title: Cyrus IMAP Server: Access restriction bypass
     Date: June 15, 2020
     Bugs: #703630
       ID: 202006-23

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
An error in Cyrus IMAP Server allows mailboxes to be created with
administrative privileges.

Background
=========
The Cyrus IMAP Server is an efficient, highly-scalable IMAP e-mail
server.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-mail/cyrus-imapd         < 3.0.13                  >= 3.0.13 

Description
==========
An issue was discovered in Cyrus IMAP Server where sieve script
uploading is excessively trusted.

Impact
=====
A user can use a sieve script to create any mailbox with administrator
privileges.

Workaround
=========
Disable sieve script uploading until the upgrade is complete.

Resolution
=========
All Cyrus IMAP Server users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-mail/cyrus-imapd-3.0.13"

References
=========
[ 1 ] CVE-2019-19783
      https://nvd.nist.gov/vuln/detail/CVE-2019-19783

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202006-23

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5/