{"id":"USN-4456-1","summary":"dovecot vulnerabilities","details":"It was discovered that Dovecot incorrectly handled deeply nested MIME\nparts. A remote attacker could possibly use this issue to cause Dovecot to\nconsume resources, resulting in a denial of service. (CVE-2020-12100)\n\nIt was discovered that Dovecot incorrectly handled memory when using NTLM.\nA remote attacker could possibly use this issue to cause Dovecot to crash,\nresulting in a denial of service. (CVE-2020-12673)\n\nIt was discovered that the Dovecot RPA mechanism incorrectly handled\nzero-length messages. A remote attacker could possibly use this issue to\ncause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)\n","modified":"2026-02-10T04:41:54Z","published":"2020-08-12T13:42:30Z","related":["UBUNTU-CVE-2020-12100","UBUNTU-CVE-2020-12673","UBUNTU-CVE-2020-12674"],"upstream":["CVE-2020-12100","CVE-2020-12673","CVE-2020-12674","UBUNTU-CVE-2020-12100","UBUNTU-CVE-2020-12673","UBUNTU-CVE-2020-12674"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4456-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12100"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12673"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12674"}],"affected":[{"package":{"name":"dovecot","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.2.22-1ubuntu2.13?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.2.22-1ubuntu2.13"}]}],"versions":["1:2.2.18-2ubuntu2","1:2.2.22-1ubuntu1","1:2.2.22-1ubuntu2","1:2.2.22-1ubuntu2.1","1:2.2.22-1ubuntu2.2","1:2.2.22-1ubuntu2.3","1:2.2.22-1ubuntu2.4","1:2.2.22-1ubuntu2.6","1:2.2.22-1ubuntu2.7","1:2.2.22-1ubuntu2.8","1:2.2.22-1ubuntu2.9","1:2.2.22-1ubuntu2.10","1:2.2.22-1ubuntu2.11","1:2.2.22-1ubuntu2.12"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-core"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-dev"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-gssapi"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-imapd"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-ldap"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-lmtpd"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-lucene"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-managesieved"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-mysql"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-pgsql"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-pop3d"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-sieve"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-solr"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"dovecot-sqlite"},{"binary_version":"1:2.2.22-1ubuntu2.13","binary_name":"mail-stack-delivery"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4456-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-12100"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-12673"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-12674"}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"dovecot","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.2.33.2-1ubuntu4.6?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.2.33.2-1ubuntu4.6"}]}],"versions":["1:2.2.27-3ubuntu1","1:2.2.33.2-1ubuntu1","1:2.2.33.2-1ubuntu2","1:2.2.33.2-1ubuntu3","1:2.2.33.2-1ubuntu4","1:2.2.33.2-1ubuntu4.1","1:2.2.33.2-1ubuntu4.2","1:2.2.33.2-1ubuntu4.3","1:2.2.33.2-1ubuntu4.4","1:2.2.33.2-1ubuntu4.5"],"ecosystem_specific":{"availability":"No subscription 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