GLSA 202101-01: Dovecot: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Dovecot: Multiple vulnerabilities
Date:	01/10/2021
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	Architecture(s)
net-mail/dovecot	< 2.3.13	>= 2.3.13	All supported architectures

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

Availability

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