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The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade dovecot | Jul 2, 2019 | Apr 24, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Apr 24, 2019 |
| Debian | — | Upgrade dovecot | Jul 30, 2024 | Apr 24, 2019 |
| Freebsd | — | Upgrade dovecot2Upgrade dovecot | Apr 19, 2019 | Apr 18, 2019 |
| Gentoo Linux | — | Upgrade net-mail/dovecot. | Sep 3, 2019 | Apr 24, 2019 |
| Huawei Euleros 2_0_sp8 | — | Upgrade dovecot-pigeonholeUpgrade dovecot-mysqlUpgrade dovecot | Jun 27, 2019 | Apr 24, 2019 |
| Suse | — | Upgrade dovecot23Upgrade dovecot23-fts-luceneUpgrade dovecot23-backend-sqliteUpgrade dovecot23-backend-mysqlUpgrade dovecot23-backend-pgsqlUpgrade dovecot23-fts-squatUpgrade dovecot23-fts-solrUpgrade dovecot23-ftsUpgrade dovecot23-devel | May 3, 2019 | Apr 9, 2019 |
| Ubuntu | — | Upgrade dovecot-core | Apr 30, 2019 | Apr 9, 2019 |
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