{"id":"UBUNTU-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":"2026-02-04T02:56:05.244290Z","published":"2019-03-21T16:00:00Z","related":["USN-4517-1"],"upstream":["CVE-2018-18898"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-18898"},{"type":"REPORT","url":"https://github.com/bestpractical/email-address-list/commit/a22e6b233443fe3ad1a408e50ecbd7237674817d"},{"type":"REPORT","url":"https://github.com/bestpractical/email-address-list/commit/6dd5021a6e5df2e8c86a163dc2e180a76a38e63b"},{"type":"REPORT","url":"https://github.com/bestpractical/email-address-list/commit/31bd4dc2dfb26fd6a17e4436df3d3c8904856f30"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4517-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-18898"}],"affected":[{"package":{"name":"libemail-address-list-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libemail-address-list-perl@0.05-1+deb9u1build0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.05-1+deb9u1build0.16.04.1"}]}],"versions":["0.05-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libemail-address-list-perl","binary_version":"0.05-1+deb9u1build0.16.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18898.json"}},{"package":{"name":"libemail-address-list-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libemail-address-list-perl@0.05-1+deb9u1build0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.05-1+deb9u1build0.18.04.1"}]}],"versions":["0.05-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libemail-address-list-perl","binary_version":"0.05-1+deb9u1build0.18.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18898.json"}},{"package":{"name":"libemail-address-list-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libemail-address-list-perl@0.06-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.06-1"}]}],"ecosystem_specific":{"binaries":[{"binary_name":"libemail-address-list-perl","binary_version":"0.06-1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-18898.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}