Gentoo: GLSA-202101-01: Dovecot: Multiple vulnerabilities

Advisories

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Gentoo Linux Security Advisory                           GLSA 202101-01
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Dovecot: Multiple vulnerabilities
     Date: January 10, 2021
     Bugs: #763525
       ID: 202101-01

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Synopsis
========

Multiple vulnerabilities have been found in Dovecot, the worst of which
could allow remote attackers to cause a Denial of Service condition.

Background
==========

Dovecot is an open source IMAP and POP3 email server.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-mail/dovecot             < 2.3.13                  >= 2.3.13

Description
===========

Multiple vulnerabilities have been discovered in Dovecot. Please review
the CVE identifiers referenced below for details.

Impact
======

A remote attacker could send a specially crafted mail or send a
specially crafted IMAP command possibly resulting in a Denial of
Service condition or an authenticated remote attacker might be able to
discover the file system directory structure and access other users'
emails.

Workaround
==========

The information disclosure vulnerability can be mitigated by disabling
IMAP hibernation feature which isn't enabled by default.

Resolution
==========

All Dovecot users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.13"

References
==========

[ 1 ] CVE-2020-24386
      https://nvd.nist.gov/vuln/detail/CVE-2020-24386
[ 2 ] CVE-2020-25275
      https://nvd.nist.gov/vuln/detail/CVE-2020-25275

Availability
============

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

 https://security.gentoo.org/glsa/202101-01

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2021 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

Gentoo: GLSA-202101-01: Dovecot: Multiple vulnerabilities

Summary

Multiple vulnerabilities have been discovered in Dovecot. Please review the CVE identifiers referenced below for details.

Resolution

All Dovecot users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.13"

References

[ 1 ] CVE-2020-24386 https://nvd.nist.gov/vuln/detail/CVE-2020-24386 [ 2 ] CVE-2020-25275 https://nvd.nist.gov/vuln/detail/CVE-2020-25275

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202101-01

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 [email protected] or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity
Severity: Normal
Title: Dovecot: Multiple vulnerabilities
Date: January 10, 2021
Bugs: #763525
ID: 202101-01

Synopsis

Multiple vulnerabilities have been found in Dovecot, the worst of which could allow remote attackers to cause a Denial of Service condition.

Background

Dovecot is an open source IMAP and POP3 email server.

Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/dovecot < 2.3.13 >= 2.3.13

Impact

A remote attacker could send a specially crafted mail or send a specially crafted IMAP command possibly resulting in a Denial of Service condition or an authenticated remote attacker might be able to discover the file system directory structure and access other users' emails.

Workaround

The information disclosure vulnerability can be mitigated by disabling IMAP hibernation feature which isn't enabled by default.

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