{"id":"ALPINE-CVE-2020-35680","details":"smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.","modified":"2025-11-19T06:18:24.721392Z","published":"2020-12-24T16:15:15.600Z","upstream":["CVE-2020-35680"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-35680"}],"affected":[{"package":{"name":"opensmtpd","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/opensmtpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.4p1-r1"}]}],"versions":["5.7.1p1-r0","5.7.1p1-r1","5.7.1p1-r2","5.7.2p1-r0","5.7.3p1-r0","5.7.3p1-r1","5.7.3p2-r0","5.7.3p2-r1","5.9.2p1-r0","5.9.2p1-r1","5.9.2p1-r2","5.9.2p1-r3","6.0.2p1-r0","6.0.2p1-r1","6.0.2p1-r2","6.0.2p1-r3","6.0.2p1-r4","6.0.2p1-r5","6.0.2p1-r6","6.0.2p1-r7","6.0.2p1-r8","6.0.3p1-r0","6.0.3p1-r1","6.0.3p1-r2","6.0.3p1-r3","6.0.3p1-r4","6.4.2p1-r0","6.4.2p1-r1","6.4.2p1-r2","6.6.1p1-r0","6.6.1p1-r1","6.6.1p1-r2","6.6.2p1-r0","6.6.4p1-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35680.json"}},{"package":{"name":"opensmtpd","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/opensmtpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.4p1-r2"}]}],"versions":["5.7.1p1-r0","5.7.1p1-r1","5.7.1p1-r2","5.7.2p1-r0","5.7.3p1-r0","5.7.3p1-r1","5.7.3p2-r0","5.7.3p2-r1","5.9.2p1-r0","5.9.2p1-r1","5.9.2p1-r2","5.9.2p1-r3","6.0.2p1-r0","6.0.2p1-r1","6.0.2p1-r2","6.0.2p1-r3","6.0.2p1-r4","6.0.2p1-r5","6.0.2p1-r6","6.0.2p1-r7","6.0.2p1-r8","6.0.3p1-r0","6.0.3p1-r1","6.0.3p1-r2","6.0.3p1-r3","6.0.3p1-r4","6.4.2p1-r0","6.4.2p1-r1","6.4.2p1-r2","6.6.1p1-r0","6.6.1p1-r1","6.6.1p1-r2","6.6.1p1-r3","6.6.2p1-r0","6.6.3p1-r0","6.6.3p1-r1","6.6.4p1-r0","6.6.4p1-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35680.json"}},{"package":{"name":"opensmtpd","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/opensmtpd?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.1p1-r1"}]}],"versions":["5.7.1p1-r0","5.7.1p1-r1","5.7.1p1-r2","5.7.2p1-r0","5.7.3p1-r0","5.7.3p1-r1","5.7.3p2-r0","5.7.3p2-r1","5.9.2p1-r0","5.9.2p1-r1","5.9.2p1-r2","5.9.2p1-r3","6.0.2p1-r0","6.0.2p1-r1","6.0.2p1-r2","6.0.2p1-r3","6.0.2p1-r4","6.0.2p1-r5","6.0.2p1-r6","6.0.2p1-r7","6.0.2p1-r8","6.0.3p1-r0","6.0.3p1-r1","6.0.3p1-r2","6.0.3p1-r3","6.0.3p1-r4","6.4.2p1-r0","6.4.2p1-r1","6.4.2p1-r2","6.6.1p1-r0","6.6.1p1-r1","6.6.1p1-r2","6.6.1p1-r3","6.6.2p1-r0","6.6.3p1-r0","6.6.3p1-r1","6.6.4p1-r0","6.6.4p1-r1","6.7.1p1-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-35680.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}