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Gentoo Linux Security Advisory 202009-02

Gentoo Linux Security Advisory 202009-02
Posted Sep 7, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202009-2 - Multiple vulnerabilities have been found in Dovecot, the worst of which could allow remote attackers to cause a Denial of Service condition. Versions less than 2.3.11.3 are affected.

tags | advisory, remote, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2020-12100, CVE-2020-12673, CVE-2020-12674
MD5 | ebcfd57317df8fe31dcaca1f536069ba

Gentoo Linux Security Advisory 202009-02

Change Mirror Download
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Gentoo Linux Security Advisory GLSA 202009-02
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https://security.gentoo.org/
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Severity: Normal
Title: Dovecot: Multiple vulnerabilities
Date: September 06, 2020
Bugs: #736617
ID: 202009-02

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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 < 2.3.11.3 >= 2.3.11.3

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

It was discovered that Dovecot incorrectly handled deeply nested MIME
parts, incorrectly handled memory when using NTLM, and incorrectly
handled zero-length messages.

Impact
======

A remote attacker could send a specially crafted mail or send specially
crafted authentication requests possibly resulting in a Denial of
Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Dovecot users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.11.3"

References
==========

[ 1 ] CVE-2020-12100
https://nvd.nist.gov/vuln/detail/CVE-2020-12100
[ 2 ] CVE-2020-12673
https://nvd.nist.gov/vuln/detail/CVE-2020-12673
[ 3 ] CVE-2020-12674
https://nvd.nist.gov/vuln/detail/CVE-2020-12674

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

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

https://security.gentoo.org/glsa/202009-02

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
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