Red Hat Security Advisory 2021-1887-01 - 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. Issues addressed include a denial of service vulnerability.
045796f3b8418b5d1ac6859ee2713ae9bc1a6fe4c33f84ee2b09f1874015aaf9Debian Linux Security Advisory 4825-1 - Several vulnerabilities have been discovered in the Dovecot email server.
cf693b635e996bdc26281c39413a36a22f79f81d8a17b14eed1e84213499f91aGentoo Linux Security Advisory 202101-1 - Multiple vulnerabilities have been found in Dovecot, the worst of which could allow remote attackers to cause a Denial of Service condition. Versions less than 2.3.13 are affected.
40994030351d28d70fccdc9b526a2814bde6989f0445e6469d0113eecae63f41Dovecot versions 2.2.26 through 2.3.11.3 suffer from a bypass issue. When imap hibernation is active, an attacker can cause Dovecot to discover file system directory structure and access other users' emails using a specially crafted command. The attacker must have valid credentials to access the mail server.
5e5468067fc35516788b52ac2a4e75207c4c6d4b1f0ea93176e970b293daf7d6Ubuntu Security Notice 4674-1 - It was discovered that Dovecot incorrectly handled certain imap hibernation commands. A remote authenticated attacker could possibly use this issue to access other users' email. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10. Innokentii Sennovskiy discovered that Dovecot incorrectly handled MIME parsing. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. Various other issues were also addressed.
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