# CVE-2020-10957: dovecot: Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind CVE-2020-10957 is fixed in 19 products on 1 platform, first by dovecot-auth-lua 1:2.3.7.2-1ubuntu3.1, released May 18, 2020. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2020-10957 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0717 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 18, 2020 ## Description Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fix(es): * dovecot: malformed NOOP commands leads to DoS (CVE-2020-10957) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | dovecot RHEL 8 | 1:2.3.8-2.el8_2.1 | [RHSA-2020:2901](https://patchblox.com/security/data/fix/linux/rhsa-2020-2901.md) | Jul 13, 2020 | | Linux | dovecot ol 8 | 1:2.3.8-2.el8_2.1 | [ELSA-2020-2901](https://patchblox.com/security/data/fix/linux/elsa-2020-2901.md) | Jul 14, 2020 | | Linux | dovecot-auth-lua Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-auth-lua 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-auth-lua-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-core Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-core 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-core-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-devel RHEL 8 | 1:2.3.8-2.el8_2.1 | [RHSA-2020:2901](https://patchblox.com/security/data/fix/linux/rhsa-2020-2901.md) | Jul 13, 2020 | | Linux | dovecot-devel ol 8 | 1:2.3.8-2.el8_2.1 | [ELSA-2020-2901](https://patchblox.com/security/data/fix/linux/elsa-2020-2901.md) | Jul 14, 2020 | | Linux | dovecot-gssapi Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-gssapi 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-gssapi-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-imapd Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-imapd 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-imapd-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-ldap Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-ldap 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-ldap-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-lmtpd Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-lmtpd 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-lmtpd-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-lucene Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-lucene 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-lucene-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-managesieved Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-managesieved 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-managesieved-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-mysql RHEL 8 | 1:2.3.8-2.el8_2.1 | [RHSA-2020:2901](https://patchblox.com/security/data/fix/linux/rhsa-2020-2901.md) | Jul 13, 2020 | | Linux | dovecot-mysql Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-mysql 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-mysql-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-mysql ol 8 | 1:2.3.8-2.el8_2.1 | [ELSA-2020-2901](https://patchblox.com/security/data/fix/linux/elsa-2020-2901.md) | Jul 14, 2020 | | Linux | dovecot-pgsql RHEL 8 | 1:2.3.8-2.el8_2.1 | [RHSA-2020:2901](https://patchblox.com/security/data/fix/linux/rhsa-2020-2901.md) | Jul 13, 2020 | | Linux | dovecot-pgsql Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-pgsql 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-pgsql-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-pgsql ol 8 | 1:2.3.8-2.el8_2.1 | [ELSA-2020-2901](https://patchblox.com/security/data/fix/linux/elsa-2020-2901.md) | Jul 14, 2020 | | Linux | dovecot-pigeonhole RHEL 8 | 1:2.3.8-2.el8_2.1 | [RHSA-2020:2901](https://patchblox.com/security/data/fix/linux/rhsa-2020-2901.md) | Jul 13, 2020 | | Linux | dovecot-pigeonhole ol 8 | 1:2.3.8-2.el8_2.1 | [ELSA-2020-2901](https://patchblox.com/security/data/fix/linux/elsa-2020-2901.md) | Jul 14, 2020 | | Linux | dovecot-pop3d Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-pop3d 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-pop3d-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-sieve Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-sieve 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-sieve-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-solr Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-solr 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-solr-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-sqlite Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-sqlite 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-sqlite-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | dovecot-submissiond Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [dovecot-submissiond 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-dovecot-submissiond-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | | Linux | mail-stack-delivery Ubuntu 20.04 LTS (focal) | 1:2.3.7.2-1ubuntu3.1 | [mail-stack-delivery 1:2.3.7.2-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mail-stack-delivery-1-2.3.7.2-1ubuntu3.1.md) | May 18, 2020 | --- Data as of 2026-11-08T13:06:02Z UTC. 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