{"id":"UBUNTU-CVE-2018-18509","details":"A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird \u003c 60.5.1.","modified":"2026-04-22T13:00:22.822840Z","published":"2018-12-31T00:00:00Z","related":["USN-3897-1"],"upstream":["CVE-2018-18509"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-18509"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2019-06/#CVE-2018-18511"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3897-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-18509"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/thunderbird@1:60.5.1+build2-0ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:60.5.1+build2-0ubuntu0.14.04.1"}]}],"versions":["1:24.0+build1-0ubuntu1","1:24.0+build1-0ubuntu2","1:24.1.1+build1-0ubuntu0.13.10.1","1:24.1.1+build1-0ubuntu1","1:24.2.0+build1-0ubuntu1","1:24.4.0+build1-0ubuntu1","1:24.5.0+build1-0ubuntu0.14.04.1","1:24.6.0+build1-0ubuntu0.14.04.1","1:31.0+build1-0ubuntu0.14.04.1","1:31.1.1+build1-0ubuntu0.14.04.1","1:31.1.2+build1-0ubuntu0.14.04.1","1:31.2.0+build2-0ubuntu0.14.04.1","1:31.3.0+build1-0ubuntu0.14.04.1","1:31.4.0+build1-0ubuntu0.14.04.1","1:31.5.0+build1-0ubuntu0.14.04.1","1:31.6.0+build1-0ubuntu0.14.04.1","1:31.7.0+build1-0ubuntu0.14.04.1","1:31.8.0+build1-0ubuntu0.14.04.1","1:38.2.0+build1-0ubuntu0.14.04.1","1:38.3.0+build1-0ubuntu0.14.04.1","1:38.4.0+build3-0ubuntu0.14.04.1","1:38.5.1+build2-0ubuntu0.14.04.1","1:38.6.0+build1-0ubuntu0.14.04.1","1:38.7.2+build1-0ubuntu0.14.04.1","1:38.8.0+build1-0ubuntu0.14.04.1","1:45.2.0+build1-0ubuntu0.14.04.3","1:45.3.0+build1-0ubuntu0.14.04.4","1:45.4.0+build1-0ubuntu0.14.04.1","1:45.5.1+build1-0ubuntu0.14.04.1","1:45.7.0+build1-0ubuntu0.14.04.1","1:45.8.0+build1-0ubuntu0.14.04.1","1:52.1.1+build1-0ubuntu0.14.04.1","1:52.2.1+build1-0ubuntu0.14.04.1","1:52.3.0+build1-0ubuntu0.14.04.1","1:52.4.0+build1-0ubuntu0.14.04.2","1:52.5.0+build1-0ubuntu0.14.04.1","1:52.6.0+build1-0ubuntu0.14.04.1","1:52.7.0+build1-0ubuntu0.14.04.1","1:52.8.0+build1-0ubuntu0.14.04.1","1:52.9.1+build3-0ubuntu0.14.04.1","1:60.2.1+build1-0ubuntu0.14.04.2","1:60.4.0+build2-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No 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