[ GLSA 202101-01 ] Dovecot

[GLSA]

Gentoo Linux Security Advisory

Title: Dovecot: Multiple vulnerabilities (GLSA 202101-01)
Severity: normal
Exploitable: local, remote
Date: 2021-01-10
Bug(s): #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: net-mail/dovecot
Vulnerable: < 2.3.13
Unaffected: >= 2.3.13
Architectures: 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: