GLSA 202009-02: Dovecot: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Dovecot: Multiple vulnerabilities
Date:	09/06/2020
Bugs:	#736617
ID:	202009-02

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	Architecture(s)
net-mail/dovecot	< 2.3.11.3	>= 2.3.11.3	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202009-02.xml

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.