{"id":"UBUNTU-CVE-2019-16791","details":"In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy.","modified":"2026-05-20T16:03:44.807104350Z","published":"2020-01-22T02:15:00Z","upstream":["CVE-2019-16791"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-16791"},{"type":"REPORT","url":"https://github.com/Snawoot/postfix-mta-sts-resolver/security/advisories/GHSA-h92m-42h4-82f6"},{"type":"REPORT","url":"https://gist.github.com/Snawoot/b9da85d6b26dea5460673b29df1adc6b"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-16791"}],"affected":[{"package":{"name":"postfix-mta-sts-resolver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/postfix-mta-sts-resolver?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-1","0.7.0-1","0.7.3-1","0.7.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.5-1","binary_name":"postfix-mta-sts-resolver"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16791.json"}},{"package":{"name":"postfix-mta-sts-resolver","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/postfix-mta-sts-resolver?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-4","1.1.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.2-1","binary_name":"postfix-mta-sts-resolver"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16791.json"}},{"package":{"name":"postfix-mta-sts-resolver","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/postfix-mta-sts-resolver?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.2-1.1","1.1.2-1.1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"postfix-mta-sts-resolver","binary_version":"1.1.2-1.1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16791.json"}},{"package":{"name":"postfix-mta-sts-resolver","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/postfix-mta-sts-resolver?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"postfix-mta-sts-resolver","binary_version":"1.5.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16791.json"}},{"package":{"name":"postfix-mta-sts-resolver","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/postfix-mta-sts-resolver?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.0-1","1.5.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.5.0-1build1","binary_name":"postfix-mta-sts-resolver"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-16791.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}