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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
security@gentoo.org 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
--Apple-Mail=_5FA05A54-FF53-44D6-A245-709D8A4AF0D3
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><pre style="word-wrap: break-word; white-space: pre-wrap;"
class="">- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 202101-01
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<a href="
https://security.gentoo.org/" class="">
https://security.gentoo.org/</a>
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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
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
<a href="
https://nvd.nist.gov/vuln/detail/CVE-2020-24386" class="">
https://nvd.nist.gov/vuln/detail/CVE-2020-24386</a>
[ 2 ] CVE-2020-25275
<a href="
https://nvd.nist.gov/vuln/detail/CVE-2020-25275" class="">
https://nvd.nist.gov/vuln/detail/CVE-2020-25275</a>
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
<a href="
https://security.gentoo.org/glsa/202101-01" class="">
https://security.gentoo.org/glsa/202101-01</a>
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
<a href="mailto:
security@gentoo.org" class="">
security@gentoo.org</a> or alternatively, you may file a bug at
<a href="
https://bugs.gentoo.org" class="">
https://bugs.gentoo.org</a>.
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.
<a href="
https://creativecommons.org/licenses/by-sa/2.5" class="">
https://creativecommons.org/licenses/by-sa/2.5</a></pre><div class=""><br class=""></div></body></html>
--Apple-Mail=_5FA05A54-FF53-44D6-A245-709D8A4AF0D3--
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