{"id":"USN-6611-1","summary":"exim4 vulnerability","details":"It was discovered that Exim incorrectly handled certain requests.\nA remote attacker could possibly use a published exploitation technique\nto inject e-mail messages with a spoofed MAIL FROM address, allowing bypass\nof an SPF protection mechanism.\n","modified":"2026-02-10T04:43:29Z","published":"2024-01-29T10:52:45Z","related":["UBUNTU-CVE-2023-51766"],"upstream":["CVE-2023-51766","UBUNTU-CVE-2023-51766"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6611-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-51766"}],"affected":[{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.86.2-2ubuntu2.6+esm6?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.86.2-2ubuntu2.6+esm6"}]}],"versions":["4.86-3ubuntu1","4.86-7ubuntu1","4.86-7ubuntu2","4.86-7ubuntu3","4.86.2-2ubuntu1","4.86.2-2ubuntu2","4.86.2-2ubuntu2.1","4.86.2-2ubuntu2.2","4.86.2-2ubuntu2.3","4.86.2-2ubuntu2.4","4.86.2-2ubuntu2.5","4.86.2-2ubuntu2.6","4.86.2-2ubuntu2.6+esm1","4.86.2-2ubuntu2.6+esm2","4.86.2-2ubuntu2.6+esm4","4.86.2-2ubuntu2.6+esm5"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4-base"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4-config"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4-daemon-light"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"exim4-dev"},{"binary_version":"4.86.2-2ubuntu2.6+esm6","binary_name":"eximon4"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-51766","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6611-1.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.90.1-1ubuntu1.10+esm3?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.90.1-1ubuntu1.10+esm3"}]}],"versions":["4.89-5ubuntu1","4.89-9ubuntu1","4.89-9ubuntu2","4.89-9ubuntu3","4.89-9ubuntu4","4.90.1-1ubuntu1","4.90.1-1ubuntu1.1","4.90.1-1ubuntu1.2","4.90.1-1ubuntu1.3","4.90.1-1ubuntu1.4","4.90.1-1ubuntu1.5","4.90.1-1ubuntu1.8","4.90.1-1ubuntu1.9","4.90.1-1ubuntu1.10","4.90.1-1ubuntu1.10+esm1","4.90.1-1ubuntu1.10+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4-base"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4-config"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4-daemon-light"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"exim4-dev"},{"binary_version":"4.90.1-1ubuntu1.10+esm3","binary_name":"eximon4"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-51766","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6611-1.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.93-13ubuntu1.10?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.93-13ubuntu1.10"}]}],"versions":["4.92.1-1ubuntu3","4.92.1-1ubuntu4","4.93~RC2-1ubuntu1","4.93-9ubuntu1","4.93-11ubuntu1","4.93-12ubuntu1","4.93-13ubuntu1","4.93-13ubuntu1.1","4.93-13ubuntu1.5","4.93-13ubuntu1.6","4.93-13ubuntu1.7","4.93-13ubuntu1.8","4.93-13ubuntu1.9"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4-base"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4-config"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4-daemon-light"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"exim4-dev"},{"binary_version":"4.93-13ubuntu1.10","binary_name":"eximon4"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-51766","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6611-1.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.95-4ubuntu2.5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.95-4ubuntu2.5"}]}],"versions":["4.94.2-7ubuntu2","4.95-2ubuntu2","4.95-4ubuntu1","4.95-4ubuntu2","4.95-4ubuntu2.1","4.95-4ubuntu2.2","4.95-4ubuntu2.3","4.95-4ubuntu2.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4-base"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4-config"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4-daemon-light"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"exim4-dev"},{"binary_version":"4.95-4ubuntu2.5","binary_name":"eximon4"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-51766","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6611-1.json"}}],"schema_version":"1.7.3"}