Information disclosure in Dovecot - CVE-2020-24386

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Main Vulnerability Database Vulnerabilities #VU49237

Information disclosure in Dovecot - CVE-2020-24386

Published: January 4, 2021


Vulnerability identifier: #VU49237
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-24386
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to an error, related to IMAP hibernation. A remote user can run a specially crafted command to discover system directory structure and access emails of other users.


Affected software

Dovecot
Arch Linux
Gentoo Linux
SUSE CaaS Platform
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for IBM z Systems
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server
SUSE Linux Enterprise Module for Server Applications
Ubuntu
openEuler
Fedora
dovecot (Alpine package)
dovecot (Debian package)
dovecot (Red Hat package)
dovecot-core (Ubuntu package)
dovecot-debugsource
dovecot-debuginfo
dovecot-devel
dovecot-help
dovecot
dovecot23-devel
dovecot23
dovecot23-backend-mysql
dovecot23-backend-mysql-debuginfo
dovecot23-backend-pgsql
dovecot23-backend-pgsql-debuginfo
dovecot23-backend-sqlite
dovecot23-backend-sqlite-debuginfo
dovecot23-debuginfo
dovecot23-fts-squat-debuginfo
dovecot23-debugsource
dovecot23-fts
dovecot23-fts-debuginfo
dovecot23-fts-lucene
dovecot23-fts-lucene-debuginfo
dovecot23-fts-solr
dovecot23-fts-solr-debuginfo
dovecot23-fts-squat

How to mitigate CVE-2020-24386

Install updates from vendor's website.

Dovecot - update to 2.3.13
dovecot (Alpine package) - update to 2.3.13-r0
dovecot (Debian package) - update to 2.3.4.1-5+deb10u5
dovecot (Red Hat package) - update to 2.3.8-9.el8
dovecot-core (Ubuntu package) - addressed in versions 1:2.2.22-1ubuntu2.14, 1:2.2.33.2-1ubuntu4.7, 1:2.3.7.2-1ubuntu3.3, 1:2.3.11.3+dfsg1-2ubuntu0.1
dovecot-debugsource - update to 2.3.10.1-4
dovecot-debuginfo - update to 2.3.10.1-4
dovecot-devel - update to 2.3.10.1-4
dovecot-help - update to 2.3.10.1-4
dovecot - update to 2.3.10.1-4
dovecot - addressed in versions 2.3.13-1.fc32, 2.3.13-1.fc33, 2.3.13-2.fc32
dovecot23-devel - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23 - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-mysql - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-mysql-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-pgsql - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-pgsql-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-sqlite - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-backend-sqlite-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-squat-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-debugsource - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-lucene - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-lucene-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-solr - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-solr-debuginfo - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3
dovecot23-fts-squat - addressed in versions 2.3.15-4.38.3, 2.3.15-27.3, 2.3.15-58.3

External References

Related Security Bulletins