{"id":"UBUNTU-CVE-2023-42119","details":"Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.","modified":"2026-01-30T02:11:23.270297Z","published":"2023-09-28T00:00:00Z","related":["USN-6455-1"],"upstream":["CVE-2023-42119"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-42119"},{"type":"REPORT","url":"https://www.zerodayinitiative.com/advisories/ZDI-23-1473/"},{"type":"REPORT","url":"https://exim.org/static/doc/security/CVE-2023-zdi.txt"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6455-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-42119"}],"affected":[{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.82-3ubuntu2.4+esm7?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.82-3ubuntu2.4+esm7"}]}],"versions":["4.80-7ubuntu3","4.80-7ubuntu4","4.80-9ubuntu1","4.80-9ubuntu2","4.82-3ubuntu1","4.82-3ubuntu2","4.82-3ubuntu2.1","4.82-3ubuntu2.2","4.82-3ubuntu2.3","4.82-3ubuntu2.4","4.82-3ubuntu2.4+esm1","4.82-3ubuntu2.4+esm2","4.82-3ubuntu2.4+esm3","4.82-3ubuntu2.4+esm4","4.82-3ubuntu2.4+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"exim4-base","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"exim4-config","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"exim4-daemon-light","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"exim4-dev","binary_version":"4.82-3ubuntu2.4+esm7"},{"binary_name":"eximon4","binary_version":"4.82-3ubuntu2.4+esm7"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-42119.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.86.2-2ubuntu2.6+esm5?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.86.2-2ubuntu2.6+esm5"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"exim4-base","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"exim4-config","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"exim4-daemon-light","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"exim4-dev","binary_version":"4.86.2-2ubuntu2.6+esm5"},{"binary_name":"eximon4","binary_version":"4.86.2-2ubuntu2.6+esm5"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-42119.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.90.1-1ubuntu1.10+esm2?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.90.1-1ubuntu1.10+esm2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"exim4-base","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"exim4-config","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"exim4-daemon-light","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"exim4-dev","binary_version":"4.90.1-1ubuntu1.10+esm2"},{"binary_name":"eximon4","binary_version":"4.90.1-1ubuntu1.10+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-42119.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.93-13ubuntu1.9?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.93-13ubuntu1.9"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"exim4-base","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"exim4-config","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"exim4-daemon-light","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"exim4-dev","binary_version":"4.93-13ubuntu1.9"},{"binary_name":"eximon4","binary_version":"4.93-13ubuntu1.9"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-42119.json"}},{"package":{"name":"exim4","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/exim4@4.95-4ubuntu2.4?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.95-4ubuntu2.4"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"exim4","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"exim4-base","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"exim4-config","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"exim4-daemon-heavy","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"exim4-daemon-light","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"exim4-dev","binary_version":"4.95-4ubuntu2.4"},{"binary_name":"eximon4","binary_version":"4.95-4ubuntu2.4"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-42119.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}