{"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":"2026-07-08T05:54:11.977088445Z","published":"2020-02-12T17:15:12.563Z","related":["openSUSE-SU-2024:10726-1","openSUSE-SU-2025:14715-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"30"},{"last_affected":"30"},{"introduced":"31"},{"last_affected":"31"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"}]},"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":"http://www.openwall.com/lists/oss-security/2020/02/12/2"},{"type":"EVIDENCE","url":"https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dovecot/core","events":[{"introduced":"e7f79df9925091027280d88db05fb0135e35e75a"},{"fixed":"9f41b88fafd73dbc2b33965267425813b9c6456b"}],"database_specific":{"cpe":"cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.3.9"},{"fixed":"2.3.9.3"}],"source":"CPE_RANGE"}}],"versions":["2.3.9.2","2.3.9.1","2.3.9"],"database_specific":{"source":"https://storage.googleapis.com/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"}]}