{"id":"USN-6939-1","summary":"exim4 vulnerability","details":"Phillip Szelat discovered that Exim misparses multiline MIME header\nfilenames. A remote attacker could use this issue to bypass a MIME filename\nextension-blocking protection mechanism and possibly deliver executable\nattachments to the mailboxes of end users.\n","modified":"2026-02-10T04:44:43Z","published":"2024-07-31T18:40:26Z","related":["UBUNTU-CVE-2024-39929"],"upstream":["CVE-2024-39929","UBUNTU-CVE-2024-39929"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6939-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-39929"}],"affected":[{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.86.2-2ubuntu2.6+esm8?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.86.2-2ubuntu2.6+esm8"}]}],"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","4.86.2-2ubuntu2.6+esm6","4.86.2-2ubuntu2.6+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4-base"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4-config"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4-daemon-light"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"exim4-dev"},{"binary_version":"4.86.2-2ubuntu2.6+esm8","binary_name":"eximon4"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6939-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2024-39929"}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.90.1-1ubuntu1.10+esm5?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.90.1-1ubuntu1.10+esm5"}]}],"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","4.90.1-1ubuntu1.10+esm3","4.90.1-1ubuntu1.10+esm4"],"ecosystem_specific":{"binaries":[{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4-base"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4-config"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4-daemon-light"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"exim4-dev"},{"binary_version":"4.90.1-1ubuntu1.10+esm5","binary_name":"eximon4"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6939-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2024-39929"}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.93-13ubuntu1.12?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.93-13ubuntu1.12"}]}],"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","4.93-13ubuntu1.10","4.93-13ubuntu1.11"],"ecosystem_specific":{"binaries":[{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4-base"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4-config"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4-daemon-light"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"exim4-dev"},{"binary_version":"4.93-13ubuntu1.12","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6939-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2024-39929"}],"ecosystem":"Ubuntu:20.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.95-4ubuntu2.6?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.95-4ubuntu2.6"}]}],"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","4.95-4ubuntu2.5"],"ecosystem_specific":{"binaries":[{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4-base"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4-config"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4-daemon-light"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"exim4-dev"},{"binary_version":"4.95-4ubuntu2.6","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6939-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2024-39929"}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"exim4","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.97-4ubuntu4.1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.97-4ubuntu4.1"}]}],"versions":["4.96-17ubuntu2","4.96-17ubuntu2.1","4.97-3ubuntu1","4.97-4ubuntu1","4.97-4ubuntu3","4.97-4ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4-base"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4-config"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4-daemon-heavy"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4-daemon-light"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"exim4-dev"},{"binary_version":"4.97-4ubuntu4.1","binary_name":"eximon4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6939-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2024-39929"}],"ecosystem":"Ubuntu:24.04:LTS"}}}],"schema_version":"1.7.3"}