USN-4456-1: Dovecot vulnerabilities

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Ubuntu security notices

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It was discovered that Dovecot incorrectly handled deeply nested MIME parts. A remote attacker could possibly use this issue to cause Dovecot to consume resources, resulting in a denial of service. (CVE-2020-12100) It was discovered that Dovecot incorrectly handled memory when using NTLM. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12673) It was discovered that the Dovecot RPA mechanism incorrectly handled zero-length messages. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)

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