{"id":"CVE-2018-18898","details":"The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.","modified":"2026-07-07T08:49:53.118522675Z","published":"2019-03-21T16:00:29.873Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"],"extracted_events":[{"introduced":"16.04"},{"last_affected":"16.04"},{"introduced":"18.04"},{"last_affected":"18.04"}],"source":"CPE_STRING","vendor_product":"canonical:ubuntu_linux"},{"source":"CPE_STRING","vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"},{"introduced":"10.0"},{"last_affected":"10.0"}]},{"source":"CPE_STRING","vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"28"},{"last_affected":"28"},{"introduced":"29"},{"last_affected":"29"}]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CPJVDT77ZPRU5Z2BEMZM7EBY6WZHUATZ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YR46PPHBEM76DNN4DEQMAYIKLCO3TQU2/"},{"type":"ADVISORY","url":"https://bestpractical.com/download-page"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/02/msg00009.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4517-1/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bestpractical/rt","events":[{"introduced":"ce5f72fbdc8bf043d45a1c09fa1c2af807a08695"},{"last_affected":"7197d3dade64d6ef63a329fe0e4e24bd05ca9cd9"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:bestpractical:request_tracker:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.1.13"},{"last_affected":"4.4.0"}]}}],"versions":["rt-4.4.0rc3","rt-4.4.0","rt-4.4.0rc2","rt-4.4.0rc1","rt-4.1.23","rt-4.1.19","rt-4.1.17","rt-4.1.13"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-18898.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}