{"id":"CVE-2020-7957","details":"The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing \u003e character exists. This causes a denial of service in which the recipient cannot read all of their messages.","modified":"2026-03-20T11:37:46.103117Z","published":"2020-02-12T17:15:12.563Z","related":["openSUSE-SU-2024:10726-1","openSUSE-SU-2025:14715-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XYT55WH372BJOXCJRKBDIFGBMPVOIDT/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJXHOUT3FH2DJNMACSX4GHPP4MUV4UKA/"},{"type":"ADVISORY","url":"https://dovecot.org/security"},{"type":"EVIDENCE","url":"https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2020/02/12/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dovecot/core","events":[{"introduced":"e7f79df9925091027280d88db05fb0135e35e75a"},{"fixed":"9f41b88fafd73dbc2b33965267425813b9c6456b"}],"database_specific":{"versions":[{"introduced":"2.3.9"},{"fixed":"2.3.9.3"}]}}],"versions":["2.3.9","2.3.9.1","2.3.9.2"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"30"}]},{"events":[{"introduced":"0"},{"last_affected":"31"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-7957.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}